cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Iqbal Syaichurrozi
Contact Email
iqbal_syaichurrozi@untirta.ac.id
Phone
+6282310809665
Journal Mail Official
isyaichurrozi@gmail.com
Editorial Address
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Sultan Ageng Tirtayasa
Location
Kab. serang,
Banten
INDONESIA
World Chemical Engineering Journal
Published by Universitas Sultan Ageng Tirtayasa
ISSN : -     EISSN : 24432261     DOI : https://dx.doi.org/10.62870/wcej.v8i1.26617
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering
WCEJ publishes original papers and reviewed papers on the fundamental, theoretical as well as applications of Chemical Engineering. WCEJ is published two times a year. This journal covering some aspects of chemical engineering, which are environmental chemical engineering, chemical reaction engineering, bioprocess-chemical engineering, materials synthesis and processing.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "VOLUME 1 NO. 5 DECEMBER 2017" : 5 Documents clear
Aluminum Corrosion Analysis for Environmental Acid Chloride Solution Arwati, I Gusti Ayu; Fina, Fina
World Chemical Engineering Journal VOLUME 1 NO. 5 DECEMBER 2017
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i5.2547

Abstract

Aluminum is the most commonly used metal. Aluminum is present on the bipolar plate which is a key part in PEMFC (Proton Exchange Membrane Fuel Cell). In the air, aluminum is easily oxidized, forming a thin layer (Al2O3). Therefore it's necessary to do an experiment to find out the extent of corrosion on aluminum. In this experiment, corrosion rate analysis on aluminum is arrived at by using hydrochloric acid (HCl) using weight loss and electrochemical methods. And corrosion rate results of aluminum metal with a concentration of 0.1M ; 0.2M; 0.3M; 0.4M and 0.5M with a concentration of 0.5M with a value 0.04250 grams and the smallest corrosion rate of 0.00030 gram with concentration of 0,1M. The largest value of corrosion rate at 0.58610 (mpy) and 0.91589 Ampere using electrochemical method. Morphology on aluminum is seen using SEM (Scanning Electron Microscope is pitting corrosion).
Polylactic acid Synthesis via Direct Polycondensation Method Using Candida rugosa Lipase Catalyst Rahmayetty, Rahmayetty; Barleany, Dhena Ria; Suhendi, Endang; Prasetya, Bayu; Andiyani, Tuti
World Chemical Engineering Journal VOLUME 1 NO. 5 DECEMBER 2017
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i5.2621

Abstract

Polylactic acid (PLA) is a biodegradable, biocompatible polymer and is produced from renewable natural resources. PLA synthesis through a polycondensation mechanism generally uses a metal catalyst, such as Zn and Sn oxides. The disadvantages of using metal catalysts are the contamination of products produced by the metals used so that unsafe products are used for biomedical applications and food packaging. The purpose of this research is to synthesize the safe PLA used for food packaging and biomedical applications. Polycondensation is done by pretreatment of lactic acid at 120oC for 1 hour. Diluted lactic acid is mixed with Candida rugosa lipise catalyst with a certain concentration (1, 2, 3 and 4% w / w). The mixture was heated at certain temperature (60; 80; 100 and 120oC) and vacuum pressure of 0.1 bar for 72 hours. The highest viscosity and density of PLA in this study was produced at 100oC and using 3% Candida rugosa lipase. The highest viscosity and density of PLA were 2443,9 CSt and 1231,9 mg / l respectively. Candida rugosa lipase concentration does not affect PLA yield at constant polycondensation temperature. PLA yield is affected by temperature. PLA yields at 60, 80, 100 and 120 ° C are 97.98; 97,65; 96.78; 96.13% respectively. The molecule weight of PLA at temperature 100oC for 1436-1482. Lipase concentration does not affect the molecular weight of the PLA.
The Effect of K2CO3 and Ca(OH)2 Catalysts on The Yield of Syngas Products and Tar Production on Tobacco Waste Gasification with Downdraft Gasifier Type Suhendi, Endang; Dahlin, Julianus Marthin; Almundzir, Yahya
World Chemical Engineering Journal VOLUME 1 NO. 5 DECEMBER 2017
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i5.2635

Abstract

Nowadays tobacco waste from cigarette production has not been managed properly, only used as fuel on direct combustion process that caused air pollution. To resolve it, indirect combustion method or gasification can be used. Gasification is a thermochemical process that converts solid fuel into a gas capable of fuel known as Synthesis Gas by a combustion process using limited oxygen. Fuel gases and synthesis gases produced by the gasification is used as power generation, heating, chemical products, etc. However, gasification processes also generated condensable organic compounds, so called “tar”. As the processing method, using the catalytic tar decomposition has been widely studied. The purposes of this study is to determine the effect of catalysts K2CO3 and Ca(OH)2 on increasing the composition of synthesis gas produced and decreasing the amount of tar produced. As for the steps of this research are preparation of raw materials, gasification process and analyzing the composition of the syngas. The experimental results show that alkali metal compound (K2CO3) and alkaline earth metal compound (Ca(OH)2) have a catalytic effect to decompose tar contents, to enhance gaseous production. The largest syngas composition produced by the use of Ca(OH)2 catalyst with H2= 10,20 %v; CO = 21,81 %v; dan CH4 = 2,02 %v. On tar reduction, Ca(OH)2 catalyst was better than K2CO3 catalyst with tar production reduced by 34,04%v.
Production of Poly Lactic Glycolic Acid from Solid Waste of Palm Starch Industry for Applications in the Field of Medical Biomaterials Purnavita, Sari; Rahayu, Lucia Hermawati; Rinihapsari, Elisa
World Chemical Engineering Journal VOLUME 1 NO. 5 DECEMBER 2017
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i5.1241

Abstract

Abstract Palm starch industry bring out solid waste that contain high total cellulose (cellulose and hemicellulose), that is 82,03%. Cellulose from solid waste of palm starch industry can be used in lactic acid production through hydrolysis and fermentation processes. Enzymatic hydrolysis and fermentation processes will work efficient and effectively when run simultaneously in one reactor, known as Simultaneous Sacharificatian and Fermentation (SSF). This research aimed to find out the most effective pH and quantity of inoculum in SSF process. This research was using substrate from solid waste of palm starch industry that treated by delignification using NaOH 7% and then saccharificated and fermented simultaneously using enzyme from Trichodermareesei for saccharification process, and Lactobacillus delbrueckii bacteria FNCC 0045 for lactic acid fermentation. The research was held by pH variation of 4, 5, 6 and 7, while quantity of inoculum were 5, 10, 15, 20 and 25% respectively. The incubation was at 46°C for 96 hour. The result showed that optimal pH was 6 and 25% inoculum was the best. Production of PLGA films was started with the polymerization reaction between lactic acid and glycolic acid at various ratios of monomer (wt%) = 95:5 and PLGA :PVA at various ratio (wt%)= 3:2, 3:3, 3:4, 3:5.The solution of PLGA in chloroform was added with PVA solution (as the film forming agents) and aloe vera gel (as an anti-microbial agents) subsequently, and then stirred with a magnetic stirrer for about 10 minutes until homogeneous. The homogeneous PLGA solution thereafter poured on the mold (glass plate). The results showed that the greater the amount of poly vinyl alcohol (ratio 3:5 % by weight), the greater the tensile strength of the film, but the lower elongation. Keywords: solid waste of palm starch industry; lactic acid; SSF;PLGA
Engineering of Cassava Stem Cellulose As a Filler for Manufacturing Plastic Biodegradable Febrianti, Tika; Septiriana, Irene; Ariyanto, Verananda Kusuma; Rizky, Renaldy
World Chemical Engineering Journal VOLUME 1 NO. 5 DECEMBER 2017
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i5.1995

Abstract

Biodegradable plastic is intensely researched in recently years. Out of many findings, one good finding suggests that lignocellulosic may prove to be one of the most useful alternatives to renewable environmental friendly sources. Cassava stems contain a 56.86 % cellulose. Cellulose from lignocellulosic material has a great impact to strengthen the mechanical properties of biodegradable plastic. Because cellulose has strong and stiff properties, it can be used to produce plastic film. The addition of glycerol helps to reduce the stiff properties of plastic film. This research is purposed to improve the use of cellulose from cassava stems to be a raw material of biodegradable plastic production. There are three methods to produce plastic film: hydrolysis, delignification, and casting of plastic film. IR spectra of biodegradable plastic results a cellulose and chitosan bonding because it has an ester group at wave number 2213 cm-1. SEM analysis of the additional of glycerol cracks the surface of plastic. Degradation analysis shows the use of cellulose increases the degradation rate for bioplastic by losing the mass of sample in three weeks. Tensile strength of bioplastic is not qualified with the specification of conventional polymer but it has good elongation. Therefore, there are necessarily additional materials to increase the tensile strength of bioplastic. 

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2017 2017


Reset
Filter By Issues
All Issue VOLUME 9 NO. 1 JUNE 2025 VOLUME 8 NO. 2 DECEMBER 2024 VOLUME 8 NO.1 JUNE 2024 VOLUME 7 NO. 2 DECEMBER 2023 VOLUME 7 NO.1 JUNE 2023 VOLUME 6 NO. 2 DECEMBER 2022 VOLUME 6 NO. 1 JUNE 2022 VOLUME 5 NO. 2 DECEMBER 2021 VOLUME 5 NO. 1 JUNE 2021 VOLUME 4 NO. 2 DECEMBER 2020 VOLUME 4 NO. 1 JUNE 2020 VOLUME 3 NO. 1 JUNE 2019 VOLUME 2 NO. 2 DECEMBER 2018 VOLUME 2 NO. 1 JUNE 2018 VOLUME 1 NO. 5 DECEMBER 2017 VOLUME 1 NO. 4 JUNE 2017 VOLUME 1 NO. 3 DECEMBER 2016 VOLUME 1 NO. 2 JUNE 2016 VOLUME 1 NO. 1 JUNE 2015 More Issue