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All Journal Jurnal Rekayasa Proses Reaktor International Journal of Renewable Energy Development Journal of Engineering and Technological Sciences Jurnal Chemurgy Chemistry Indonesian Journal of Chemical Research Jurnal Rekayasa Proses FLUIDA Jurnal Teknik ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia Jurnal Teknik Kimia dan Lingkungan International Journal of Renewable Energy Development Jurnal Rekayasa Proses Journal of Engineering and Technological Sciences Scientific Contributions Oil and Gas
Tirto Prakoso
Chemical Engineering Department, Faculty Of Industrial Technology, Institut Teknologi Bandung
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Journal : reaktor

 1 
Performance of Various Organic Solvents as Reaction Media in Plant Oil Lipolysis with Plant Lipase Astri Nur Istyami; Tatang Hernas Soerawidjaja; Tirto Prakoso; Tri Ari Penia Kresnowati
Reaktor Volume 18 No. 2 June 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.652 KB) | DOI: 10.14710/reaktor.18.2.71-75

Abstract

Fatty acids are intermediate substances in synthesis of oleochemical products. Enzymatic technology of fatty acids production (also known as lipolysis) is now developing as potential substitution for the conventional production of fatty acid, i.e. thermal hydrolysis of triglyceride. It offers more economical process condition, low energy consumption, and minimal product degradation compared to the conventional process. This research aims to evaluate performance of various organic solvents as reaction media in lipolysis with plant latex lipase. Organic solvents observed were chloroform, n-hexane, diethyl ether, benzene, acetone, ethanol, methanol, n-heptane, and isooctane. Analysis of each organic solvent effect on lipolysis was described based on solvents properties. Conversion of lipolysis with organic solvents is 0,10-1,25 times fold compared to conversion of non-solvent lipolysis. We suggest that dielectric constant and viscosity are the two main organic solvent properties affecting lipase performance in lipolysis. Overall, n-hexane, n-heptane, and isooctane are recommended to be used as reaction media in lipolysis with plant lipase because their effects to degree of lipolysis are positive.  Keywords: lipolysis; lipase; organic solvent; frangipani
The Study of Hydrothermal Carbonization and Activation Factors' Effect on Mesoporous Activated Carbon Production From Sargassum sp. Using a Multilevel Factorial Design Prakoso, Tirto; Rustamaji, Heri; Yonathan, Daniel; Devianto, Hary; Widiatmoko, Pramujo; Rizkiana, Jenny; Guan, Guoqing
Reaktor Volume 22 No.2 August 2022
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.22.2.59-69

Abstract

Seaweeds are large-scale multicellular marine algae categorized based on color as Chlorophyceae, Rhodophyceae, and Phaeophyceae. No information has been provided on the conditions affecting the production of mesoporous activated carbon from one member of the described aquatic plants, namely Sargassum sp. Therefore, this study aimed to determine the impact of the main factors and their interactions on Sargassum sp.-derived activated carbon manufactured (SAC) by hydrothermal carbonization and CO2 activation methods. A mathematical approach was employed using a multilevel factorial design with the main factors being the activator type (ZnCl2, CaCl2, & KOH), hydrothermal temperature (200, 225, & 250oC), and activator ratios (2 & 4). Meanwhile, the response variables were yield and BET surface area (SBET) of SAC. Morphological, functional, crystallographic, and porosity characterization was carried out on the samples. The SAC-Ca-200-2 sample had the highest yield, with the value being 26.5 percent of weight. The activators having the highest specific surface area (SBET) were SAC-Zn-250-4, SAC-Ca-225-2, and SAC-K-250-2, with 1552, 1368, and 1799 m2/g, respectively. The pore size distribution in SAC products ranged from 2.16 to 10 nm in diameter. The analysis conducted indicated the activator type and interaction with its ratio substantially impacted the SAC yield value; besides, only the activator type affects the formation of high surface area pores.
Co-Authors Akiko Tanaka Akiko Tanaka Aqsha Aqsha Arry K. Rizky Aryan Fathoni Amri Astri Nur Istyami Astri Nur Istyami Bryan Bryan Bustomi, Agus Tendi Ahmad Dadan Kusdiana Dadan Kusdiana Daniel Yonathan, Daniel Danu Wicaksana DARMANSYAH . Devianto, Hary Endar Puspawiningtiyas Eviani, Mitra Fanany, Muhammad Rifki Febriyanto, Pramahadi Godlief F. Neonufa Gozali, Edbert Guan, Guoqing Gultom, Cristy Hagi Guoqing Guan Hanifah Widiastuti Hary Devianto Hary Devianto Hary Devianto Heri Rustamaji Ida Bagus Oka Lyong Budhatama Indarto, Antonius Indra G. Pasaribu Isdiriayani Nurdin Istyami, Astri Nur Jenny Rizkiana Jenny Rizkiana Johnner P. Sitompul Kembara Alam, Alif Kurniawan, Indra B M.T.A.P. Kresnowati Makertihartha, I Gusti Bagus Ngurah Maria Mahardini Sakanti Mario C. Gultom Meiti Pratiwi Meiti Pratiwi Meiti Pratiwi Melyna, Ella Mitra Eviani Nainggolan, Federiko Markus Lasardo Nugroho, R Heru Parncheewa Udomsap Parncheewa Udomsap Pilanda Lembono Pradana, Yano Surya Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Retno G. Dewi Rizkiana, Jenny Roy Winarso S Subagjo Saputera, Wibawa Hendra Sarastri Cintya Hapsari Sari, Myra Wardati Septhian Marno Setyo Yanus Sasongko Shinichi Goto Shinichi Goto Simparmin br Ginting Soerawidjaja, Tatang H. Subagjo Subagjo Tantra Diwa Larasati Tatang H Soerawidjaja Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Toshihiro Hirotsu Toshihiro Hirotsu Widdy Andya Fanny Widiatmoko, Pramujo Yoel Pasae