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All Journal Jurnal Bioteknologi & Biosains Indonesia (JBBI) ASEAN Journal of Chemical Engineering International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis
Joko Waluyo
Chemical Engineering, Sebelas Maret University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology

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Modification of Natural Zeolite as a Catalystfor Steam Reforming of Toluene Joko Waluyo; Tobias Richards; IGBN Makertihartha; Herri Susanto
ASEAN Journal of Chemical Engineering Vol 17, No 1 (2017)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (993.264 KB) | DOI: 10.22146/ajche.49564

Abstract

A catalyst for tar cracking has been prepared successfully from natural zeolites using ion exchange with NH4NO3, and acid leaching with HNO3 solution for removing impurities and increasing pore volume. The activity of the modified zeolite was tested using toluene as a tar model compound. Tar conversion of about 54% was achieved in catalytic steam reforming at a temperature of 750C using 2 gram of catalyst and the gas hourly space velocity about 5040 h-1.
A REVIEW OF NANOCELLULOSE SYNTHESIS METHODS AND ITS APPLICATION Fuad Dimar Fauzi; Hafidz Dhany Wicaksono; Joko Waluyo
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 10 No. 1 (2023): Juni 2023
Publisher : Balai Bioteknologi, Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jbbi.v10i1.5349

Abstract

Nanocellulose is a type of cellulose that is being widely developed to replace petroleum-based polymers. This material possesses biocompatible properties, is abundant in nature, and is eco-friendly due to its biodegradability, sustainability, and non-toxic nature. Various nanocellulose synthesis methods are employed, including acid hydrolysis, alkaline, mechanical and biological treatments, as well as ionic liquid and deep eutectic solvent methods. The choice of synthesis method greatly influences the particle size and crystallinity of the resulting nanocellulose; hence further investigation is needed to determine the effectiveness of these methods. Nanocellulose finds applications in various fields, such as films, polymers, cosmetics, medical fuels, and energy storage. Among the different nanocellulose synthesis methods, ionic liquid and deep eutectic solvent (DES) methods have environmentally safe waste with better temperature, time, and diameter control compared to other methods. However, the DES method is currently preferred over the ionic liquid method due to the possibility of separating the lignin waste from the solvent.
Thermodynamic Study of Palm Kernel Shell Gasification for Aggregate Heating in an Asphalt Mixing Plant Firman Asto Putro; Sunu Herwi Pranolo; Joko Waluyo; Ary Setyawan
International Journal of Renewable Energy Development Vol 9, No 2 (2020): July 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.9.2.311-317

Abstract

This study evaluated thermodynamically the performance of conversion of palm kernel shells into combustible gas through gasification technology for aggregate heating in a hot-mixed asphalt production plant by developing a thermodynamic model using licensed Aspen Plus v.11 software. The effects of the equivalence ratio (ER) in the gasification process and the amount of combustion air to combustible gas to attain the required aggregate temperature were investigated. The thermodynamic model showed a good agreement with the experimental results based H2 and CO contain in producer gas which provided by maximum root mean square errors value of 8.82 and 6.42 respectively. Gasification of 30–35 kg of palm kernel shells in a fixed-bed gasifier reactor using air as a gasifying agent at an ER of 0.325–0.350 generated gaseous fuel for heating 1 ton of aggregate to a temperature of 180–200°C with combustion excess air 10%–20%. 
Utilization of Modified Zeolite as Catalyst for Steam Gasification of Palm Kernel Shell Joko Waluyo; Petric Marc Ruya; Dwi Hantoko; Jenny Rizkiana; I.G.B.N. Makertihartha; Mi Yan; Herri Susanto
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.3.10837.623-631

Abstract

Syngas from biomass gasification is being developed for alternative feedstock in the chemical industry. Palm kernel shell which is generated from palm oil industry can be potentially used as raw material for gasification process. The purpose of this study was to investigate the use of modified natural zeolite catalysts in steam gasification of palm kernel shells. Mordenite type zeolite was modified by acid leaching to be used as a tar cracking catalyst. Steam gasification was conducted at the temperature range of 750–850 °C and the steam to biomass ratio was in the range of 0–2.25. The result showed that steam gasification of palm kernel shell with the addition of zeolite catalyst at 750 °C and steam to biomass ratio 2.25 could reduce tar content up to 98% or became 0.7 g/Nm3. In this study, gasification of palm kernel shells produced syngas with the hydrogen concentration in the range of 52–64% and H2/CO ratio of 2.7–5.7. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Co-Authors Abdul Aziz Yudistira Ameilia Ayu Safitri Ari Diana Susanti Ary Setyawan Bregas Siswahjono Tatag Sambodo Dwi Hantoko Fawnia Hanifah Fenny Tri Ariyani Firman Asto Putro Fuad Dimar Fauzi Hafidz Dhany Wicaksono Handhianto Mustofa Herri Susanto Herri Susanto I.G.B Ngurah Makertihartha I.G.B.N. Makertihartha Ida Maya Sari Jenni Prasetiyo Jenny Rizkiana Margono Margono Mi Yan Muhammad Ibrahim Hanif Muhammad Luthfi Maulana Paryanto Paryanto Petric Marc Ruya Prabang Setyono Rizky Ridlo Ichlasul Amal Sunu Herwi Pranolo Sunu Herwi Pranolo Tobias Richards Yusi Prasetyaningsih