The annealing temperature (200–500 °C) effects of optical frequency response on the dielectric fu... more The annealing temperature (200–500 °C) effects of optical frequency response on the dielectric functions of sol–gel derived CuCoOx thin film coatings: experimental and modelling.
The aim of this research is to synthesis the Precipitated Calcium Carbonate (PCC) from Anadara gr... more The aim of this research is to synthesis the Precipitated Calcium Carbonate (PCC) from Anadara granosa cockle-sheell via carbonation method. The tested variables were the calcination temperatures (700C, 800C, and 900C) and the ratios of between calcium oxide and nitric acid (14:300, 17:300, and 20:300 gr/m)l. The formed nitric calcium was then added by ammonia to pH 12 to start the synthesis of calcium hydroxide followed by flowing it with the carbon dioxide to form white precipitate (PCC). Based on the analysed, the best yield of PCC (84.88%) was obtained at calcination temperature of 900C with the ratio of 14 gr:300 ml. The X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) characterizations revealed that the type of crystals formed was vaterit and the shape of crystals were round (sphere-like) with a relatively uniform in size, respectively.
The purpose of this research was production of precipitated calcium carbonate (PCC) from blood co... more The purpose of this research was production of precipitated calcium carbonate (PCC) from blood cockle shell waste using carbonation method. Carbonation method that was used to synthesis PCC was modificated carbonation method by CaO as calcination result and HNO3 reaction and then flowed the CO2 gas. The learned variable was variation of the nitric acid concentration (1,5; 2; and 2,5 M) and CaO/HNO3 ratio (14:300; 17:300; 20:300 gr/ml). The highest yield of PCC was reached from the concentration of nitric acid 2 M and ratio 14 gr : 300 ml which the yield was 84,88%. From the X-Ray Diffraction (XRD) characteristic result, able to know the crystal form that reached was vaterite which was reinforced from analysis result of Scanning Elcetron Microscopy (SEM) with the sphere partical. Key words: Blood cockle shell, carbonation, PCC, SEM, XRD
Solar Selective Absorber (SSA) is the most important part that determines the efficiency of solar... more Solar Selective Absorber (SSA) is the most important part that determines the efficiency of solar thermal collectors. SSA should have high absorptance (low reflectance at wavelengths 2.5 m). Solar selective absorber can be synthesized using sol-gel dip coating method. The purpose of this research is to know the effect variation number of dipping-drying cycles to absorptance copper-cobalt coating and get a coating of copper cobalt that have absorptance value is high (> 80%) and low emitance (<10%). The coating were synthesized by molar percursors 0.25:0.5M and number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x. Reflektance spectra in the area of UV-Vis-NIR showed that increased cycles of dipping-drying cycles (which increases the thickness of the coating) increase the value of absorptance (α). The results showed that the highest absorptance value found in coatings which was synthesized using mixture copper nitrate and cobalt nitrate 0.25:0.5M M at 2x cycles (dipping...
The electronic structure of p-type GaN layers exposed to low-energy nitrogen ion bombardment was ... more The electronic structure of p-type GaN layers exposed to low-energy nitrogen ion bombardment was studied by near-edge Xray absorption fine-structure (NEXAFS) spectroscopy. It was found that ion bombardment lead to the creation of states lying below the nitrogen absorption edge which posses p-symmetry. These states are attributed to nitrogen interstitials with different local topologies created during ion bombardment. Furthermore, the NEXAFS spectra also shows the development of a strong p Ã-resonance above the absorption edge with increasing incident nitrogen ion energy. This peak is attributed to the formation of molecular nitrogen at interstitial positions, arising from a build up of nitrogen ions on these sites.
Journal of Community Engagement Research for Sustainability
Telah dilakukan kegiatan penyuluhan dan pelatihan pembuatan nugget ikan patin terhadap para santr... more Telah dilakukan kegiatan penyuluhan dan pelatihan pembuatan nugget ikan patin terhadap para santri di Rumah Amal MIS Hubbullah Pekanbaru. Kegiatan dilakukan oleh dosen di Jurusan Teknik Kimia FT UNRI yang dibantu oleh mahasiwa. Evaluasi kegiatan dilakukan baik sebelum maupun setelah kegiatan dilakukan. Dari hasil evaluasi kegiatan diketahui bahwa terjadi peningkatan pemahaman dan kemampuan peserta dalam pengolahan ikan patin menjadi produk nugget ikan sebesar 94,4%. Berdasarkan survei lanjutan yang dilakukan oleh tim pengabdian diketahui bahwa para santri MIS Hubbullah melanjutkan kegiatan pembuatan nugget patin tersebut dan bahkan membuat label kemasan produk nugget patin sebagai salah satu unit usaha mereka.
Increasing the production capacity of the business unit at the Mis Hubbullah charity house to dev... more Increasing the production capacity of the business unit at the Mis Hubbullah charity house to develop and improve the business unit so that it is expected to increase income that supports the Education program at the Mis Hubbullah charity house, one of the sources of animal protein that is widely consumed by the public, easy to obtain is fish and the price is cheap, but Fish quickly undergo a process of decay, so it is necessary to preserve fish. Preservation of fish aims to reduce the water content in the fish body so that it does not provide an opportunity for bacteria to breed. Fish undergo the process of decay quickly compared to other foodstuffs. To increase sales value and income, it is necessary to give a touch of innovation so that it can add business units and attract public interest. Therefore, in this community service activity, counseling was carried out on the diversification of processed catfish meat products into practical and more quality catfish nugget products. In ...
Salah satu solusi terhadap masalah krisis energi adalah optimalisasi pemanfaatan energy matahari ... more Salah satu solusi terhadap masalah krisis energi adalah optimalisasi pemanfaatan energy matahari sebagai sumber energi alternatif. Dye-sensitized solar cell (DSSC) adalah sel surya yang memanfaatkan zat warna (dye) sebagai pengikat cahaya matahari sekaligus sebagai sensitizer-nya untuk menghasilkan listrik DC. Penelitian ini bertujuan menguji penggunaan ekstrak buah Senduduk sebagai bahan zat warna dalam DSSC dan mempelajari pengaruh fraksi/konsentrasi etanol pada proses penyiapan koating TiO 2 dalam DSSC dan ketebalannya terhadap kinerja DSSC. Zat warna diekstrak dengan melarutkan buah Senduduk dalam campuran pelarut metanol-asam asetat-aquades. Pasta TiO 2 dibuat dengan mencampurkan 5 g TiO 2 ke dalam 40 ml pelarut ethanol-air dengan berbagai variasi konsentrasi/fraksi. Selanjutnya TiO 2 dideposisikan pada substrat kaca fluorine tin oxide (FTO) menggunakan spin coater dengan variasi ketebalan yang selanjutnya disintering membentuk elektroda kerja. Elektroda lawan (counter-electrode) yang sekaligus sebagai katalis dibuat menggunakan lapisan karbon. Uji UV-Vis menunjukkan bahwa ekstrak buah Senduduk mengandung senyawa antosianin sebagai media sensitizer. Semakin besar fraksi etanol dalam pelarut pasta TiO 2 dan semakin tebal koating TiO 2, maka semakin tinggi tegangan listrik yang dihasilkan. Tegangan tertinggi ditunjukkan oleh DSSC dengan koating yang disintesis menggunakan etanol tanpa pengenceran yaitu sebesar 659 mV/cm 2 (pencahayaan LED), dan sebesar 1806,7 mV/cm 2 (pencahayaan matahari langsung). Uji morfologi menunjukkan peningkatan fraksi etanol pada preparasi pasta TiO 2 mempengaruhi morfologi permukaan koating yang bermuara pada peningkatan kinerja DSSC. Peningkatan fraksi etanol juga meningkatkan daya adhesi koating TiO 2 pada substrat.
Availability of petroleum as a fuel that can not be updated further reduced by increasing the use... more Availability of petroleum as a fuel that can not be updated further reduced by increasing the use of oil for human needs. For that we need to do a conversion innovation of energy that do not depend on fossil resources and can be renewable and have an output similar to that produced from fossil resources. One such innovation is the conversion of biomass derived from pine merkusii wood to bio-oil. Bio-oil can be produced by pyrolysis of pine merkusii wood with catalyst NiMo/NZA. Objective this research to produce bio-oil from pine merkusii wood as an alternative fuel, studying the effect of the weight ratio of the catalyst NiMo/NZA to the biomass, studying the effect of metal impregnation Nickel (Ni) and Molybdenum (Mo) on Natural Zeolite deAluminated (NZA) and characterization of physical properties and chemical properties of bio-oil. Process pyrolysis was carried out at 320 0C, silinap 500 ml, 50 grams of biomass with + 100-200 mesh sieve size, variations in the catalyst NiMo/NZA to...
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Dye-Sensitized Solar Cell (DSSC) is a solar cell unit that work based on electrochemical principl... more Dye-Sensitized Solar Cell (DSSC) is a solar cell unit that work based on electrochemical principle which convert the sun radiation into electricity. DSSC uses TiO2 semiconductor material for coating with spin coating method. The purpose of this research is to make a DSSC prototype using of Malabar melastome fruit (Melastoma Malabathricum L.) as dye and also to observe the impact of water's volume and soaking duration of TiO2 coating on the produced voltage. The DSSC is constructed with a layering system (sandwich) which consists of working electrode and counter electrode. The working electrode is made by using FTO glass (2.5 x 2.5 cm2) which is coated with TiO2 paste that made by mixing 0.5 gram TiO2 powder in 4 ml ethan ol (1:8). The electrode is sintered under temperature in 350oC for 15 minutes and then soaked in dye liquid with volume of solvent fraction in dye dilution which are ; without dilution (100%); diluted once (50%); and diluted twice (25%) for about 10 minutes, 2 h...
Telah berhasil disintesis koating silika tembaga kobal oksida pada substrat aluminium menggunakan... more Telah berhasil disintesis koating silika tembaga kobal oksida pada substrat aluminium menggunakan metode sol-gel dip-coating untuk aplikasi solar selektif absorber. Lapisan koating antirefleksi silika yang diperoleh dari proses kalsinasi gel tetraethyl orthosilicate (TEOS) melapisi lapisan underlayer tembaga kobal oksida yang diperoleh dari proses kalsinasi gel tembaga kobal berbasis nitrat. Hasil integrasi selanjutnya dikarakterisasi sifat optisnya berupa absorptansi () dan emitansi () secara berturut-turut menggunakan UV-VisNir yang dilengkapi bola integrasi dan FTIR spectrophotometer. Pengaruh jumlah siklus pencelupan – pengeringan (ketebalan) antirefleksi silika terhadap sifat absorptansi dan emitansi dari lapisan hasil integrasi diperlajari. Secara umum terlihat bahwa nilai absorptansi berfluktuasi terhadap peningkatan jumlah siklus pencelupan – pengeringan, dengan nilai absorptansi tertinggi =86,1% ditunjukkan oleh koating silika dengan 3 kali siklus pencelupan-pengeringan....
Various types of waste are found in TPA Muara Fajar Timur, Rumbai District, Pekanbaru. One of the... more Various types of waste are found in TPA Muara Fajar Timur, Rumbai District, Pekanbaru. One of the waste that does not decompose is styrofoam. If styrofoam is not handled seriously, it will have an impact on the environment and endanger the surrounding community. Styrofoam waste contains polystyrene foam which contains hazardous materials for health and the environment. For this reason, efforts should be made to handle the styrofoam waste, namely by recycling styrofoam into useful and economical products. One of the uses of Styrofoam waste is making latex glue. Latex glue is a product that is widely used by the community so that if it is produced it will be able to meet the needs both for themselves and for the needs of the community. Latex glue is made from styrofoam by adding toluene and surfactants (sodium lauryl sulfate / SLS) or by adding gasoline to Styrofoam.The results obtained were that the community could understand and be able to make latex glue. The results of the success...
20 6 Indonesian Institute of Sciences (LIPI), Serpong, Tangerang, Indonesia 22 23 Received ...., ... more 20 6 Indonesian Institute of Sciences (LIPI), Serpong, Tangerang, Indonesia 22 23 Received ...., revised ...., accepted .... 24 Published online ..... 25 26
Availability of fossil fuels as a non-renewable energy source has decreased due to the increase o... more Availability of fossil fuels as a non-renewable energy source has decreased due to the increase of energy consumption. Therefore, it is needed an alternative renewable energy sources, such as conversion of biomass derived from acacia mangium wood. Bio-oil can be produced by pyrolisis of Acacia mangium wood with catalyst Ni/clay. The purpose of this research are to produce bio-oil from acacia wood, to characterize of Ni/clay catalyst, to determine the effect of the impregnation of Ni metal in to clay and ratio of Ni/clay catalyst on the yield of bio-oil and to determine the physical and chemical characteristics of bio-oil. The pyrolysis was used 50 grams acacia wood, 500 ml silinap and Ni/clay catalyst with variations of the percentage of the Ni metal 0%, 1%, 2%, 3%, respectively and the variation ratio of Ni/clay catalyst of the biomass 3%, 5% and 7% with a stirring speed of 300 rpm and a temperature of 320oC for 120 minutes. In this research, the highest yield was on the use of the...
The annealing temperature (200–500 °C) effects of optical frequency response on the dielectric fu... more The annealing temperature (200–500 °C) effects of optical frequency response on the dielectric functions of sol–gel derived CuCoOx thin film coatings: experimental and modelling.
The aim of this research is to synthesis the Precipitated Calcium Carbonate (PCC) from Anadara gr... more The aim of this research is to synthesis the Precipitated Calcium Carbonate (PCC) from Anadara granosa cockle-sheell via carbonation method. The tested variables were the calcination temperatures (700C, 800C, and 900C) and the ratios of between calcium oxide and nitric acid (14:300, 17:300, and 20:300 gr/m)l. The formed nitric calcium was then added by ammonia to pH 12 to start the synthesis of calcium hydroxide followed by flowing it with the carbon dioxide to form white precipitate (PCC). Based on the analysed, the best yield of PCC (84.88%) was obtained at calcination temperature of 900C with the ratio of 14 gr:300 ml. The X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) characterizations revealed that the type of crystals formed was vaterit and the shape of crystals were round (sphere-like) with a relatively uniform in size, respectively.
The purpose of this research was production of precipitated calcium carbonate (PCC) from blood co... more The purpose of this research was production of precipitated calcium carbonate (PCC) from blood cockle shell waste using carbonation method. Carbonation method that was used to synthesis PCC was modificated carbonation method by CaO as calcination result and HNO3 reaction and then flowed the CO2 gas. The learned variable was variation of the nitric acid concentration (1,5; 2; and 2,5 M) and CaO/HNO3 ratio (14:300; 17:300; 20:300 gr/ml). The highest yield of PCC was reached from the concentration of nitric acid 2 M and ratio 14 gr : 300 ml which the yield was 84,88%. From the X-Ray Diffraction (XRD) characteristic result, able to know the crystal form that reached was vaterite which was reinforced from analysis result of Scanning Elcetron Microscopy (SEM) with the sphere partical. Key words: Blood cockle shell, carbonation, PCC, SEM, XRD
Solar Selective Absorber (SSA) is the most important part that determines the efficiency of solar... more Solar Selective Absorber (SSA) is the most important part that determines the efficiency of solar thermal collectors. SSA should have high absorptance (low reflectance at wavelengths 2.5 m). Solar selective absorber can be synthesized using sol-gel dip coating method. The purpose of this research is to know the effect variation number of dipping-drying cycles to absorptance copper-cobalt coating and get a coating of copper cobalt that have absorptance value is high (> 80%) and low emitance (<10%). The coating were synthesized by molar percursors 0.25:0.5M and number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x. Reflektance spectra in the area of UV-Vis-NIR showed that increased cycles of dipping-drying cycles (which increases the thickness of the coating) increase the value of absorptance (α). The results showed that the highest absorptance value found in coatings which was synthesized using mixture copper nitrate and cobalt nitrate 0.25:0.5M M at 2x cycles (dipping...
The electronic structure of p-type GaN layers exposed to low-energy nitrogen ion bombardment was ... more The electronic structure of p-type GaN layers exposed to low-energy nitrogen ion bombardment was studied by near-edge Xray absorption fine-structure (NEXAFS) spectroscopy. It was found that ion bombardment lead to the creation of states lying below the nitrogen absorption edge which posses p-symmetry. These states are attributed to nitrogen interstitials with different local topologies created during ion bombardment. Furthermore, the NEXAFS spectra also shows the development of a strong p Ã-resonance above the absorption edge with increasing incident nitrogen ion energy. This peak is attributed to the formation of molecular nitrogen at interstitial positions, arising from a build up of nitrogen ions on these sites.
Journal of Community Engagement Research for Sustainability
Telah dilakukan kegiatan penyuluhan dan pelatihan pembuatan nugget ikan patin terhadap para santr... more Telah dilakukan kegiatan penyuluhan dan pelatihan pembuatan nugget ikan patin terhadap para santri di Rumah Amal MIS Hubbullah Pekanbaru. Kegiatan dilakukan oleh dosen di Jurusan Teknik Kimia FT UNRI yang dibantu oleh mahasiwa. Evaluasi kegiatan dilakukan baik sebelum maupun setelah kegiatan dilakukan. Dari hasil evaluasi kegiatan diketahui bahwa terjadi peningkatan pemahaman dan kemampuan peserta dalam pengolahan ikan patin menjadi produk nugget ikan sebesar 94,4%. Berdasarkan survei lanjutan yang dilakukan oleh tim pengabdian diketahui bahwa para santri MIS Hubbullah melanjutkan kegiatan pembuatan nugget patin tersebut dan bahkan membuat label kemasan produk nugget patin sebagai salah satu unit usaha mereka.
Increasing the production capacity of the business unit at the Mis Hubbullah charity house to dev... more Increasing the production capacity of the business unit at the Mis Hubbullah charity house to develop and improve the business unit so that it is expected to increase income that supports the Education program at the Mis Hubbullah charity house, one of the sources of animal protein that is widely consumed by the public, easy to obtain is fish and the price is cheap, but Fish quickly undergo a process of decay, so it is necessary to preserve fish. Preservation of fish aims to reduce the water content in the fish body so that it does not provide an opportunity for bacteria to breed. Fish undergo the process of decay quickly compared to other foodstuffs. To increase sales value and income, it is necessary to give a touch of innovation so that it can add business units and attract public interest. Therefore, in this community service activity, counseling was carried out on the diversification of processed catfish meat products into practical and more quality catfish nugget products. In ...
Salah satu solusi terhadap masalah krisis energi adalah optimalisasi pemanfaatan energy matahari ... more Salah satu solusi terhadap masalah krisis energi adalah optimalisasi pemanfaatan energy matahari sebagai sumber energi alternatif. Dye-sensitized solar cell (DSSC) adalah sel surya yang memanfaatkan zat warna (dye) sebagai pengikat cahaya matahari sekaligus sebagai sensitizer-nya untuk menghasilkan listrik DC. Penelitian ini bertujuan menguji penggunaan ekstrak buah Senduduk sebagai bahan zat warna dalam DSSC dan mempelajari pengaruh fraksi/konsentrasi etanol pada proses penyiapan koating TiO 2 dalam DSSC dan ketebalannya terhadap kinerja DSSC. Zat warna diekstrak dengan melarutkan buah Senduduk dalam campuran pelarut metanol-asam asetat-aquades. Pasta TiO 2 dibuat dengan mencampurkan 5 g TiO 2 ke dalam 40 ml pelarut ethanol-air dengan berbagai variasi konsentrasi/fraksi. Selanjutnya TiO 2 dideposisikan pada substrat kaca fluorine tin oxide (FTO) menggunakan spin coater dengan variasi ketebalan yang selanjutnya disintering membentuk elektroda kerja. Elektroda lawan (counter-electrode) yang sekaligus sebagai katalis dibuat menggunakan lapisan karbon. Uji UV-Vis menunjukkan bahwa ekstrak buah Senduduk mengandung senyawa antosianin sebagai media sensitizer. Semakin besar fraksi etanol dalam pelarut pasta TiO 2 dan semakin tebal koating TiO 2, maka semakin tinggi tegangan listrik yang dihasilkan. Tegangan tertinggi ditunjukkan oleh DSSC dengan koating yang disintesis menggunakan etanol tanpa pengenceran yaitu sebesar 659 mV/cm 2 (pencahayaan LED), dan sebesar 1806,7 mV/cm 2 (pencahayaan matahari langsung). Uji morfologi menunjukkan peningkatan fraksi etanol pada preparasi pasta TiO 2 mempengaruhi morfologi permukaan koating yang bermuara pada peningkatan kinerja DSSC. Peningkatan fraksi etanol juga meningkatkan daya adhesi koating TiO 2 pada substrat.
Availability of petroleum as a fuel that can not be updated further reduced by increasing the use... more Availability of petroleum as a fuel that can not be updated further reduced by increasing the use of oil for human needs. For that we need to do a conversion innovation of energy that do not depend on fossil resources and can be renewable and have an output similar to that produced from fossil resources. One such innovation is the conversion of biomass derived from pine merkusii wood to bio-oil. Bio-oil can be produced by pyrolysis of pine merkusii wood with catalyst NiMo/NZA. Objective this research to produce bio-oil from pine merkusii wood as an alternative fuel, studying the effect of the weight ratio of the catalyst NiMo/NZA to the biomass, studying the effect of metal impregnation Nickel (Ni) and Molybdenum (Mo) on Natural Zeolite deAluminated (NZA) and characterization of physical properties and chemical properties of bio-oil. Process pyrolysis was carried out at 320 0C, silinap 500 ml, 50 grams of biomass with + 100-200 mesh sieve size, variations in the catalyst NiMo/NZA to...
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Dye-Sensitized Solar Cell (DSSC) is a solar cell unit that work based on electrochemical principl... more Dye-Sensitized Solar Cell (DSSC) is a solar cell unit that work based on electrochemical principle which convert the sun radiation into electricity. DSSC uses TiO2 semiconductor material for coating with spin coating method. The purpose of this research is to make a DSSC prototype using of Malabar melastome fruit (Melastoma Malabathricum L.) as dye and also to observe the impact of water's volume and soaking duration of TiO2 coating on the produced voltage. The DSSC is constructed with a layering system (sandwich) which consists of working electrode and counter electrode. The working electrode is made by using FTO glass (2.5 x 2.5 cm2) which is coated with TiO2 paste that made by mixing 0.5 gram TiO2 powder in 4 ml ethan ol (1:8). The electrode is sintered under temperature in 350oC for 15 minutes and then soaked in dye liquid with volume of solvent fraction in dye dilution which are ; without dilution (100%); diluted once (50%); and diluted twice (25%) for about 10 minutes, 2 h...
Telah berhasil disintesis koating silika tembaga kobal oksida pada substrat aluminium menggunakan... more Telah berhasil disintesis koating silika tembaga kobal oksida pada substrat aluminium menggunakan metode sol-gel dip-coating untuk aplikasi solar selektif absorber. Lapisan koating antirefleksi silika yang diperoleh dari proses kalsinasi gel tetraethyl orthosilicate (TEOS) melapisi lapisan underlayer tembaga kobal oksida yang diperoleh dari proses kalsinasi gel tembaga kobal berbasis nitrat. Hasil integrasi selanjutnya dikarakterisasi sifat optisnya berupa absorptansi () dan emitansi () secara berturut-turut menggunakan UV-VisNir yang dilengkapi bola integrasi dan FTIR spectrophotometer. Pengaruh jumlah siklus pencelupan – pengeringan (ketebalan) antirefleksi silika terhadap sifat absorptansi dan emitansi dari lapisan hasil integrasi diperlajari. Secara umum terlihat bahwa nilai absorptansi berfluktuasi terhadap peningkatan jumlah siklus pencelupan – pengeringan, dengan nilai absorptansi tertinggi =86,1% ditunjukkan oleh koating silika dengan 3 kali siklus pencelupan-pengeringan....
Various types of waste are found in TPA Muara Fajar Timur, Rumbai District, Pekanbaru. One of the... more Various types of waste are found in TPA Muara Fajar Timur, Rumbai District, Pekanbaru. One of the waste that does not decompose is styrofoam. If styrofoam is not handled seriously, it will have an impact on the environment and endanger the surrounding community. Styrofoam waste contains polystyrene foam which contains hazardous materials for health and the environment. For this reason, efforts should be made to handle the styrofoam waste, namely by recycling styrofoam into useful and economical products. One of the uses of Styrofoam waste is making latex glue. Latex glue is a product that is widely used by the community so that if it is produced it will be able to meet the needs both for themselves and for the needs of the community. Latex glue is made from styrofoam by adding toluene and surfactants (sodium lauryl sulfate / SLS) or by adding gasoline to Styrofoam.The results obtained were that the community could understand and be able to make latex glue. The results of the success...
20 6 Indonesian Institute of Sciences (LIPI), Serpong, Tangerang, Indonesia 22 23 Received ...., ... more 20 6 Indonesian Institute of Sciences (LIPI), Serpong, Tangerang, Indonesia 22 23 Received ...., revised ...., accepted .... 24 Published online ..... 25 26
Availability of fossil fuels as a non-renewable energy source has decreased due to the increase o... more Availability of fossil fuels as a non-renewable energy source has decreased due to the increase of energy consumption. Therefore, it is needed an alternative renewable energy sources, such as conversion of biomass derived from acacia mangium wood. Bio-oil can be produced by pyrolisis of Acacia mangium wood with catalyst Ni/clay. The purpose of this research are to produce bio-oil from acacia wood, to characterize of Ni/clay catalyst, to determine the effect of the impregnation of Ni metal in to clay and ratio of Ni/clay catalyst on the yield of bio-oil and to determine the physical and chemical characteristics of bio-oil. The pyrolysis was used 50 grams acacia wood, 500 ml silinap and Ni/clay catalyst with variations of the percentage of the Ni metal 0%, 1%, 2%, 3%, respectively and the variation ratio of Ni/clay catalyst of the biomass 3%, 5% and 7% with a stirring speed of 300 rpm and a temperature of 320oC for 120 minutes. In this research, the highest yield was on the use of the...
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