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All Journal Indonesian Journal of Chemistry Bulletin of Chemical Reaction Engineering & Catalysis
Karna Wijaya
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta 55281
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Computer Aided Design of Molecular Imprinted Polymer for Selective Recognition of Capsaicin Iqmal Tahir; Karna Wijaya; Shafiqul Islam; Mohd Noor Ahmad
Indonesian Journal of Chemistry Vol 14, No 1 (2014)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.762 KB) | DOI: 10.22146/ijc.21272

Abstract

Searching capsaicin-like molecule as an alternative dummy template has been conducted for the synthesis of Molecularly Imprinted Polymer (MIP) of capsaicin. Dummy template should be applied because synthesis of capsaicin practically has a problem due to its structure containing double bond at the aliphatic chains. Virtual searching was done using an online chemical database of ChemDB containing 5 million commercial molecules. Capsaicin structure was converted into SMILES code and then it was run on ChemDB with molecular similarity threshold of 0.5. There were 69 chemical structures obtained as the output and pseudocapsaicin was practically selected as the dummy template. Experimental result from the prediction evaluation showed that the use of capsaicin as template and pseudocapsaicin as dummy template produced MIPs that have separation factor of 1.28 and 1.25 respectively. It is suggested to choose pseudocapsaicin as dummy template for the synthesis MIP of capsaicin instead of using capsaicin molecule.
NaHCO₃-Assisted Synthesis of Ni-Promoted Sulfated Mesoporous Silica for the Hydrocracking of Used Cooking Oil into Biogasoline Karna Wijaya; Marini Fairuz Vebryana; Niko Prasetyo; Aldino Javier Saviola; Wahyu Dita Saputri; Amalia Kurnia Amin; Latifah Hauli; Saharman Gea
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 1 Year 2026 (April 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20531

Abstract

Biofuel production from biomass sources remains a key area of research, aimed at reducing reliance on fossil fuels and promoting environmental sustainability. This study investigates the conversion of used cooking oil (UCO) into biogasoline via catalytic hydrocracking, employing sulfated mesoporous silica dispersed with nickel as the catalyst. Mesoporous silica was synthesized using tetraethyl orthosilicate (TEOS) and NaHCO₃ as the template, followed by a hydrothermal method to introduce sulfate groups and nickel metal. Among the synthesized catalysts, SMS-2 exhibited the highest acidity across varying sulfuric acid concentrations, while 1 Ni/SMS-2 demonstrated superior acidity compared to other nickel loadings. The SiO₂, SMS-2, and 1 Ni/SMS-2 catalysts were evaluated for UCO hydrocracking in a semi-batch double-furnace reactor operated at an optimum temperature of 550 °C for 2 h, with a hydrogen flow rate of 20 mL min⁻¹ under atmospheric pressure. Modifying mesoporous silica with sulfuric acid and nickel significantly enhanced its catalytic performance, with the 1 Ni/SMS-2 catalyst achieving the highest liquid product yield (66.10%) and gasoline fraction (35.47%) at an optimum catalyst-to-feed ratio of 1:100 (w/w). Notably, the resulting biogasoline exhibited a calorific value comparable to commercial gasoline and was free of aromatic hydrocarbons, indicating the potential for cleaner combustion. This study provides valuable insights into the effectiveness of mesoporous silica-based catalysts, highlighting their acid site modulation capabilities for efficiently transforming waste into high-value fuels. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Aldino Javier Saviola Amalia Kurnia Amin Iqmal Tahir Latifah Hauli Marini Fairuz Vebryana Mohd Noor Ahmad Niko Prasetyo Saharman Gea Shafiqul Islam Wahyu Dita Saputri