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Djeni Hendra
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Materials Science & Nanotechnology

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REKAYASA PEMBUATAN MESIN PELET KAYU DAN PENGUJIAN HASILNYA Djeni Hendra
Jurnal Penelitian Hasil Hutan Vol. 30 No. 2 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.2.144-154

Abstract

Stock of fossil fuel will be decrescasing in the coming years accordingly, finding other raw material from renewable sources especially wood waste has to be sought. This material can be used as beat, electricity, transportation and directly used as fuel wood. However, phirycal properties of biomass, particularly sawdust has low density, difficult to store and transport. This problemscan be solved by converting sawdust into wood pelletusing a bat brydraulic press machine. The objective of this study was to make wood pellet machine and testing characteristics of the wood pellets. The machine has been succesfully made with production capacity of 2.67 kg/ b. Ramwmaterial sused in these research were sawdust of Tectona grandis, Paraserianthes falcataria and Acacia auriculiformis with particle size of 60 and 80 mesh. These materials were then machined into wood pellets at three stages of temperatures, ie. 150, 180 and 250°C respectively. Evaluation of wood pellet quality included moisture content, ash content, volatile matter, calorific value, density and pressure strength. The results showed that the bigbest quality of wood pellet was abtained from teak sawdust of size 80 meshand press temperature of 250 CThis process produced condition wood pellet with moisture content of 0.98%, asb content 0,93, volatile matter 80.63%%, density 0.82 g/cm', pressure strength 387,64 kg/cmi and calorific value of 4961.51 cal/g. Productivity of wood pellet machineis 2.67 kg with electric energy consumption of 2,55 kWh per hour.
PEMANFAATAN LIMBAH TEMPURUNG KEMIRI SUNAN (Aleuriteus trisperma) SEBAGAI BAHAN BAKU PADA PEMBUATAN ARANG AKTIF Djeni Hendra; R. Esa Pangersa Gusti; Sri Komarayati
Jurnal Penelitian Hasil Hutan Vol. 32 No. 4 (2014): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2014.32.4.271-282

Abstract

Charcoal is a porous solid material which is resulted from combustion of material that containing the carbon element (C). Charcoal can be used as raw materials in the manufacture of batteries, charcoal briquettes, and charcoal compost, can also be further processed in to activated charcoal. This study aims to manufacturing activated carbon from Kemiri Sunan shell waste as raw materials, determining it's optimum conditions and physico-chemical properties. The results showed that Kemiri Sunan shell can be used as raw material for activated charcoal with the following qualities: adsorb capacity of iodine solution 138.46‑768.31 mg/g, adsorb capacity of benzene 2.99‑21.37 %, and adsorb capacity of methylene blue 18.239‑260.237 mg/g. The optimum conditions of manufacturing of activated charcoal is produced at temperature of 850 °C that are soaked in a solution of 10 % H3PO4 with steam activation time for 90 minutes results adsorb capacity of iodine and methylene blue which meets the technical requirements of activated charcoal in the Indonesian standard (SNI) number 06‑3730‑1995.
POTENSI STRUKTUR NANO KARBON DARI BAHAN LIGNOSELULOSA KAYU JATI DAN BAMBU Gustan Pari; Adi Santoso; Djeni Hendra; Buchari; Akhirudin Maddu; Mamat Rachmat; Muji Harsini; Teddi Her anto; Saptadi Darmawan
Jurnal Penelitian Hasil Hutan Vol. 34 No. 4 (2016): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2016.34.4.309-322

Abstract

Nanotechnology research in the realm of forest products can be exploited from lignocellulose into nano carbon. The research was aimed to provide the potency of nano carbon structure from lignosellulose as bioenergy or biosensor material. O The materials of teak wood and bamboo were carbonized into charcoal at 400-500 C followed by activation using O chemical and physical processes at 800 C for 60 minutes. This process produced charcoal with high crystalinity and surface area. After purification and activation, the activated charcoal was subsequently doped process with Zn and Ni metals which O then followed by sintering using spark plasma at 1300 C. The qualities and structure of all the resulting carbon were evaluated using nano scale devices i.e. Pyrolysis Gas Chromatography Mass Spectrometer, Scanning Electron Microscope Energy Diffraction X-ray Spectrometer, X-ray Diffractometer, I-V meter and potensiometer. Results showed that the best activated charcoal produced from the chemical-physical activation (KOH steam) possessed high fixed carbon of 84.29%; 2 surface area of 850.5 m /g, crystallinity of 38,99% and resistancy of 0.10. The teak activated charcoal which intercalated by Ni at ratio of 1:5 produced the best properties with crystallinity degree of 73.45% and conductivity of 433.86 S/m. The sintered teak activated charcoal had crystallinity degree of 78.29% with I-V meter pattern in sigmoid shape and the potentiometer response formed a slope approaching the Nerst factors. Nano carbon produced from lignocellulose is a semiconductor and more suitably use for biosensors, particularly the one derived from teak wood.
Co-Authors ADI SANTOSO Akhirudin Maddu Armi Wulanawati Arya Sokanandi Buchari Bunga Ayu Safitri Eti Rohaeti Gustan Pari Heru S. Wibisono Heru S.Wibisono Heru Wibisono Ibrahim Kamela Gustina Mamat Rachmat Muji Harsini Novitri Hastuti Nur Adi Saputra R. Esa Pangersa Gusti Santiyo Wibowo Saptadi Darmawan Sri Komarayati Teddi Her anto Teddi Heriyanto Teddi Heryanto Totok K Waluyo