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All Journal Mimbar Sekolah Dasar Biopropal Industri Chimica et Natura Acta International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Tropical Livestock Science Journal
Egi Agustian
Pusat Penelitian Kimia-LIPI, Kawasan Puspiptek Serpong 15314, Tangerang 15314
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Veterinary

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Journal : International Journal of Renewable Energy Development

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Performance of sulfided NiMo catalyst supported on pillared bentonite Al and Ti under hydrodeoxygenation reaction of guaiacol Rinaldi, Nino; Sari, Novi Liana; Sumari, S.; Kristiani, Anis; Agustian, Egi; Widjaya, Robert Ronald; Dwiatmoko, Adep
International Journal of Renewable Energy Development Vol 13, No 3 (2024): May 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60060

Abstract

Bio-crude oil is known to be sustainable, eco-environmentally, and an alternative energy source produced by biomass pyrolysis. However, its quality remains relatively low due to a higher oxygen concentration compared to liquid fuels from fossils. Therefore, an upgrading process is necessary through the catalytic hydrodeoxygenation (HDO) process. This work synthesized pillared bentonite using Al and Ti metals as the pillaring agent to produce Al-PILC and Ti-PILC as catalyst support for sulfided NiMo. Their catalytic activity in HDO reaction using guaiacol as a model compound of bio-crude oil were also evaluated. Characterization of the bentonite-pillared materials, including Al-PILC, Mo/Al-PILC, NiMo/Al-PILC, Ti-PILC, Mo/Ti-PILC, and NiMo/Ti-PILC, was performed using Surface Area Analyzer, X-ray Diffractometer (XRD), Temperature-Programmed Desorption of ammonia (NH3-TPD), X-Ray Fluorescence (XRF), and Scanning Electron Microscope (SEM) techniques. The characterization results confirm the pillarization process of bentonite using Al and Ti metals as the pillaring agent, and the preparation of the NiMo catalyst using the stepwise impregnation method was successfully prepared. The NiMo/Ti-PILC catalyst performs a superior conversion value on the HDO guaiacol reaction than other catalysts. A well dispersion of Mo and Ni metals on the surface support (NiMo/Ti-PILC), thus creating numerous active sites of the catalyst after the sulfidation. Variations in time and temperature during the HDO guaiacol reaction significantly affected the conversion.
Bio-briquettes from tea fluff biochar: a response surface methodology study on particle size, resin gum-adhesive, and used cooking oil immersion time Suryajaya, Suryajaya; Agustian, Egi; Haryanti, Ninis Hadi; Prasetia, Hafiizh; Rahmah, Siti; Kurniawan, Hendris Hendarsyah; Wianto, Totok; Ramadhoni, Benni F; Manik, Tetti Novalina; Annisa, Nova; Rezamela, Erdiansyah; Sulaswatty, Anny
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60877

Abstract

Fluff tea is the residual solid waste generated in the green tea industry and holds the potential for development as a solid fuel in bio-briquettes. This study transformed fluff tea into bio-briquettes utilizing biochar produced through slow pyrolysis. The study aimed to optimize bio-briquettes production from fluff tea using the Response Surface Methodology (RSM) approach through proximate analysis. The cylindrical bio-briquettes were produced using biochar particle sizes of 850, 500, and 150 μm, resin gum adhesive concentrations of 10%, 15%, and 20%, and immersion times in cooking oil of 0, 3, and 6 minutes. The results showed that the overall response by the p-value was <0.05, and the lack of fit was insignificant (p-value >0.05). The findings indicated that the calorific value of tea fluff rose from 4,482.56 cal/g to 6,374.98 cal/g after conversion to biochar. The optimum conditions for producing tea fluff bio-briquettes were a particle size of 850 μm, adhesive concentration of 11%, and immersion time of 5 minutes. The bio-briquettes exhibited a moisture content of 3.53%, ash content of 5.65%, volatile matter of 14.75%, fixed carbon of 76.14%, calorific value of 7,796.37 cal/g, combustion rate of 0.11 g/min, density of 1.22 g/cm3, and compressive strength of 35.57 N/cm2. Most tea fluff briquettes' properties had met Indonesia's briquettes standard. The production of bio-briquettes from tea fluff waste is a viable alternative fuel for both industrial and domestic applications.
Co-Authors Adam Yuliandri, Lili Anis Kristiani, Anis Anny Sulaswatty, Anny Atep Sujana Dwiatmoko, Adep Dwiatmoko, Adid Adep Erdiansyah Rezamela, Erdiansyah Firmansyah, Sanji Hafiizh Prasetia, Hafiizh Hanifah, Yuliza Hendris Hendarsyah Kurniawan, Hendris Hendarsyah Indah Laela Rahmah, ulfa Indri Badria Adilina Isalmi Aziz Joni Prasetyo, Joni Julia, J. Maharani, Najiah Sephia Maisaroh Maisaroh Manik, Tetti Novalina Ninis Hadi Haryanti, Ninis Hadi Nino Rinaldi Nova Annisa, Nova Novia Dwi Rahmawati Nuni Widiarti Prana Dwija Iswara, Prana Dwija Ramadhoni, Benni F sandie gunara, sandie Sari, Novi Liana Sembiring, Rinawati Sumari, S. Suryajaya Suryajaya, Suryajaya Totok Wianto Widjaya, Robert Ronal Widjaya, Robert Ronald Yati Maryati yati, indri Yedi Kurniadi, Yedi Yildiz, Yıldız Mutlu