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All Journal HAYATI Journal of Biosciences Reaktor International Journal of Science and Engineering (IJSE) METANA JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Bulletin of Chemical Reaction Engineering & Catalysis Majalah Ilmiah MOMENTUM Jurnal Manajemen Sumber Daya Perairan Indonesian Journal of Chemistry Jurnal Geofisika Jurnal Teknik Kimia Indonesia Journal of Renewable Energy, Electrical, and Computer Engineering Journal of Bioresources and Environmental Sciences Journal of Bioresources and Environmental Sciences International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis
A Abdullah
Jurusan Teknik Kimia Fakultas Teknik Universitas Diponegoro Semarang
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Journal : Bulletin of Chemical Reaction Engineering

 1 
Inhibition Effect of Ca2+ Ions on Sucrose Hydrolysis Using Invertase Hargono Hargono; Bakti Jos; Abdullah Abdullah; Teguh Riyanto
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (382.156 KB) | DOI: 10.9767/bcrec.14.3.4437.646-653

Abstract

Fermentable sugar for bioethanol production can be produced from molasses due to its high sucrose content but Ca2+ ions found in the molasses may affect the hydrolysis. Therefore, this paper was focused to study the effect of Ca2+ ions as CaO on sucrose hydrolysis using invertase and to obtain the kinetic parameters. The kinetic parameters (KM and Vmax) were obtained using a Lineweaver-Burk plot. The value of KM and Vmax parameters were 36.181 g/L and 21.322 g/L.h, respectively. The Ca2+ ions act as competitive inhibitor in sucrose hydrolysis using invertase. Therefore, the inhibition mechanism was followed the competitive inhibition mechanism. The value of inhibition constant was 0.833 g/g. These parameters were obtained from the non-substrate inhibition process because this study used the low substrate concentrations which means the fermentable sugar production was low. Hence, there were still more challenges to studying the simultaneous effect of substrate and Ca2+ on sucrose hydrolysis to produce high fermentable sugar. 
Biodiesel Production from Nyamplung (Calophyllum inophyllum) Oil using Ionic Liquid as A Catalyst and Microwave Heating System Prima Astuti Handayani; Abdullah Abdullah; Hadiyanto Hadiyanto
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 2 Year 2017 (August 2017)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (109.482 KB) | DOI: 10.9767/bcrec.12.2.807.293-298

Abstract

Nyamplung (Calophyllum inophyllum) is a typical Indonesian plant. Its seed contains abundant inedible oil, and therefore it is potential for biodiesel feedstock. The current issues of biodiesel are longer  reaction time of oil to biodiesel through transesterification reaction and lower biodiesel yield due to ineffective use of a homogenous catalyst. This work was aimed to use an ionic liquid as a catalyst and equipped with microwave heating as the heating system in order to increase the biodiesel yield and accelerate the process. Effects of the catalyst concentration and power of microwave irradiation to the biodiesel yield were studied. The ionic liquid of 1-butyl-3-methylimidazolium hydrogen sulfate (BMIMHSO4) was used as a catalyst. The results showed that the highest biodiesel yield was achieved of 92.81% which was catalyzed by IL0.5NaOH0.5 (0.5 wt.% (BMIMHSO4) + 0.5 wt.% NaOH) with a methanol-to-oil molar ratio of 9, a reaction time of 6 minutes, and the microwave temperature was 60 °C. 
Co-Authors . Bahtiar . Widayat Ahmad Fauzi Ismail Ahmad Mustafa Aisy, S R Al Hadatz, Jubair Alice Pramashinta Andi Irwan Nur, Andi Irwan Ardina, Wa Ode Argadenta Adi Prabawa Bakti Jos Bayu Wicaksono Broto Dhegdo Haris Pranoto Cholish D. Soetrisnanto Danang Kristiyanto Dian Arofisma Dyah Hesti Wardhani Elisa Mutiah Elisa Mutiah Emil Hanityo Utomo Erlinda Khoirunisa Erlinda Khoirunisa F Armanda, F Fahmi Arifan Fenti, La Ode Gandini, D. R. A H Hadiyanto H Hamid H. Satriadi Hamid Hamid Hanafi Mat Hanapi bin Mat Hanapi bin Mat Hantoro Satriado Hargono Hargono Ibrahim Ghazi Ika Windrianto K. Handono Iswandi, . Kasim, Ma'ruf La Anadi, La Lin Liu Lucia Hermawati Rahayu M. Hadi M. Hadi Maani, Gratischa VHL Madrinovella, I Maharani Kusumaningrum Malau, Ayu Tamara Marcelinus Christwardana Marlia, . Nadia, La Ode Abdul Rajab Njie, Yahya Pranata, B Prima Astuti Handayani Salsabila, Unik Hanifah Samida, . Sasmito, Hardianto Setiawan, Y A Siswo Sumardiono Sitepu, Trahman Suhardja, S K Teguh Riyanto Tutuk Djoko Kusworo Weidong Wang