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All Journal International Journal of Electrical and Computer Engineering JURNAL TEKNOLOGI LINGKUNGAN JTERA (Jurnal Teknologi Rekayasa) Majalah Ilmiah Pengkajian Industri Jurnal Energi dan Lingkungan (Enerlink) International Journal of Renewable Energy Development
Masfuri, Imron
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Journal : International Journal of Renewable Energy Development

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Effects of CaO addition into CuO/ZnO/Al2O3 catalyst on hydrogen production through water gas shift reaction Hastuti, Zulaicha Dwi; Rosyadi, Erlan; Anindita, Hana Nabila; Masfuri, Imron; Rahmawati, Nurdiah; Rini, Tyas Puspita; Anggoro, Trisno; Prabowo, Wargiantoro; Saputro, Frendy Rian; Syafrinaldy, Ade
International Journal of Renewable Energy Development Vol 13, No 4 (2024): July 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.59257

Abstract

Hydrogen is a promising renewable energy carrier and eco-friendly alternative to fossil fuels. Water-gas-shift reaction (WGSR) is commonly used to generate hydrogen from renewable biomass feedstocks. Enriching hydrogen content in synthesis gas (syngas) production can be made possible by applying the WGSR after gasification. WGSR can achieve a maximal carbon monoxide (CO) conversion using a commercially patented CZA (Cu/ZnO/Al2O3) catalyst. This study proposed three in-lab self-synthesized CZA catalysts to be evaluated and compared with the patented catalyst performance-wise. The three catalysts were prepared with co-precipitation of different Cu:Zn:Al molar ratios: CZA-431 (4:3:1), CZA-531 (5:3:1) and CZA-631 (6:3:1). The catalysts characteristics were determined through X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis and Scanning Electron Microscopy (SEM) techniques. CO gas was mixed with steam in a catalytic reactor with a 3:1 molar ratio, running continuously through the catalyst at 250 °C for 30 mins. All three catalysts, however, performed below expectations, where CZA-431 had a CO conversion of 77.44%, CZA-531 48.75%, and CZA-631 71.67%. CaO, as a co-catalyst, improved the performance by stabilizing the gas composition faster. The CO conversion of each catalyst also improved: CZA-431 improved its CO conversion to 97.39%, CZA-531 to 96.71%, and CZA-631 to 95.41%. The downward trend of the CO conversion was deemed to be caused by copper content found in CZA-531 and CZA-631 but not in CZA-431, which tended to form a Cu-Zn metal complex, weakening the catalyst's activity.
Synergistic co-pyrolysis of Gracilaria waste and waste tires: Enhancing bio-oil quality through thermal and chemical bond optimization Masfuri, Imron; Mohamad, Shaza Eva; Sugeng, Dhani Avianto; Amdrullah, Apip; Yahya, Wira Jazair
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.2025.61202

Abstract

The increasing demand for renewable energy and sustainable waste management has prompted research into innovative conversion technologies. This study explored the co-pyrolysis of Gracilaria waste (GW) and waste tires (WT) as a potential approach to improving bio-oil quality by enhancing its hydrocarbon content and reducing oxygenated compounds. The novelty of this study lay in providing new mechanistic insights into the co-pyrolysis process by systematically analyzing the thermal degradation behavior and chemical bond evolution of GW-WT mixtures using a combination of TGA, FTIR, and GC-MS techniques. This detailed chemical transformation analysis differentiated the study from prior research that primarily focused on product yields. The study analyzed the thermal degradation behavior and chemical bond transformation of GW and WT mixtures during pyrolysis, hypothesizing that the addition of WT to GW would enhance the hydrocarbon profile and thermal stability of the resulting bio-oil. Thermogravimetric analysis (TGA) was employed to evaluate the decomposition behavior of five different GW-WT blend ratios under an inert atmosphere, while Fourier Transform Infrared Spectrosco py (FTIR) was used to assess chemical functional group evolution in both raw materials and pyrolytic products. The results revealed that GW pyrolysis exhibited a single weight loss peak (100–350°C) with a total weight loss of 40%, while WT pyrolysis followed a two-stage decomposition process (200–500°C) with a total weight loss of 65%. The GW-WT mixture resulted in a total weight loss of approximately 60%, indicating a synergistic effect between the two feedstocks. FTIR analysis confirmed a reduction in hydroxyl (-OH) groups and an increase in hydrocarbon-related bonds (C=C, C-C, and C-H), demonstrating improved bio-oil composition. These findings suggested that incorporating waste tires into Gracilaria pyrolysis enhanced bio-oil quality and hydrocarbon content, offering a promising approach for biomass valorization and sustainable energy production. Future research should explore process optimization through catalyst integration and scale-up potential for industrial applications.
Co-Authors Adelia, Nesha Adiprabowo, Arya Bhaskara Amdrullah, Apip Anggoro, Trisno Bambang Suwondo Rahardjo Dwimansyah, Ridho Hana Nabila Anindita, Hana Nabila Hastuti, Zulaicha Dwi Irawan, Bagus Bhakti Juwita, Asmi Rima Mohamad, Shaza Eva Muharto, Bambang Murti, Galuh Wirama Pertiwi, Astri Prabowo, Wargiantoro Prasetyo, Dwi Husodo Priambodo, Trisaksono Bagus Priyanto, Unggul Rahmawati, Nurdiah Rini, Tyas Puspita Rosyadi, Erlan Saputro, Frendy Rian Semuel Pati Senda Soleh, Soleh Sugeng, Dhani Avianto Syafrinaldy, Ade YAHYA, WIRA JAZAIR