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Iqbal Syaichurrozi
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Jurusan Teknik Kimia, Fakultas Teknik, Universitas Sultan Ageng Tirtayasa
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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 4 NO. 1 JUNE 2020" : 5 Documents clear
The Synthesis of Glutaraldehyde-modified Chitosan Utilizing MAOS (Microwave Assisted Organic Synthesis) Method as Adsorbent of Pb(II) Ions Contained in Water Sample of Cikapundung River - Bandung Herayati, Herayati; Wahyuningrum, Deana
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10591

Abstract

Indonesia has a vast territory. Approximately 2/3 of Indonesia is water. Indonesia has almost 6% of the world's water resources or approximately 21% of water resources in the Asia Pacific region. Indonesian waters comprise 97.4% seas and 2.6% are rivers, lakes and straits. There are 309 rivers in Indonesia and 49 of them flow through Bandung; one of them is Cikapundung River. Pb(II) ions contained in Cikapundung River has exceeded the quality standard of water river. Therefore, it is necessary to reduce the amount of Pb(II) ions from the river. One of the solutions is by using biodegradable adsorbent, the glutaraldehyde-modified chitosan. Chitosan was obtained from deacetylation of chitin in basic condition. The chitosan was characterized using FTIR showed 85.5% degrees of deacetylation. The other characterization is determination of average molecular mass using Ostwald viscometry method, obtained the average molecular mass of chitosan is 2.7 x 106 g/mol. Furthermore, chitosan was modified by reacting with glutaraldehyde using MAOS (Microwave Assisted Organic Synthesis) method at 80℃ with irradiation power of 100 W for 60 minutes to form glutaraldehyde-modified chitosan with 79% degree of substitution. The synthesized glutaraldehyde-modified chitosan was characterized by FTIR, SEM, SAA and applied as adsorbent of Pb(II) ions. The results showed that the optimum condition of adsorption for 15 mL of Pb(II) solution was achieved at pH 4 using 0.075 grams of adsorbent and 90 minutes of contact time. The adsorption process of Pb(II) ions follows the Langmuir isotherm model and the pseudo-second order kinetics with percent adsorption of Pb(II) ions from the water sample of Cikapundung river is 84% and 50.2%, for sample collected from middle-stream and downstream of river, respectively.
The Effect of Immersion Time on The Ability of Tannins to Inhibit The Corrosion Rate of Mild Steel In 1M H2SO4 Solution Pramudita, Marta; Sukirno, Sukirno; Nasikin, Mohammad
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10592

Abstract

Tannin is a polyphenol compound that is widely found in various types of plants. Polyphenol compounds can inhibit the corrosion rate of mild steel. This study aims to determine the effect of immersion time on tannins' ability to inhibit the corrosion rate of mild steel in 1M sulfuric acid. The method used is weight loss with immersion time variations of 2,4 and 6 hours, temperature variations of 313K, 333K, and 353K. The concentration variation used was 0; 250; 500; 750; 1000; 1250 ppm. From the research results, it was found that the immersion time affected tannins' ability to inhibit corrosion in mild steel. The highest efficiency was 71.07% at a concentration of 1250 ppm and 313K. The longer the immersion time, the lower the tannin ability to inhibit corrosion in mild steel.
Performance Test of Biomass Cookstove with Torrefied Rice Husk as Fuel Using Water Boiling Test Method Alwan, Hafid; Irawan, Anton; Santika, Santika; Nurindah, Erlin
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10585

Abstract

One of the way to increase effectiveness and efficiency of using biomass as fuel is through gasification cookstove technology. Gasification cookstoves is tools used to convert biomass into combustible gases via thermochemical pathline. Rice husk is a type of biomass that has a low heating value of 14 MJ/Kg. Therefore, it is necessary to pre-treat it through torefaction to increase the calorific value of the fuel so that it can increase the thermal efficiency of the gasification cookstove. This research was conducted to obtain the optimum conditions for air flow rate, height of the bed, and fuel type of rice husk torrefied. This research was conducted by inserting rice husk torrefied as fuel with a variation of height of the bed 42.6 cm; 31.5 cm; and 21.3 cm, the secondary air flow rate openings (full open; partial open; close), and type of fuel used is the rice husk torrefied at temperature 250 oC for 60 minutes (fuel A), and temperature 300 °C for 30 minutes (fuel B). The optimum operating conditions were found at 21.3 cm of bed height, full close secondary air opening, with type A fuel. While the highest efficiency value of 18.75% was found in type A fuel, with bed height 31.5 cm, and secondary air opening is full close.
Syngas Production by the Gasification of Bayah’s Coal over Ca(OH)2 and Na2CO3 catalyst Heriyanto, Heri; Nahudin, Ahmad; Amyranti, Mutia; Firdaus, Mochamad Adha; Suhendi, Endang; Kosimaningrum, Widya Ernayati
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10589

Abstract

Official data of Indonesia’s coal reserve provided by government in 2014 approximately reached 104.8 billion tonnes. Bayah as a part of South Banten region has been stored quite amount of coal. Gasification is one solution to utilize Bayah’s coal potential. Coal Gasification is a conversion process of solid phase coal into synthetic gas mixture (CO, H2). Main reaction of the process involves Boundouard and Water-Gas-Shift reaction. The aim of experiment was to observes influence of several variables such as : Air Fuel Ratio (AFR), Temperature, and Catalyst at particular condition. Gasification process becomes beneficial when ratio of synthetic gas mixture (H2/CO) exhibits 2.0. Synthetic gas mixtures were analyzed by using gas chromatograph method. 300 grams of Bayah’s coal (14 – 18 mesh) were gasified in updraft type of fixed bed reactor using steam injection under Air Fuel Ratio varied between 1.5, 2.0, 2.5, temperature of 600°C, 700°C, 800°C and catalyst of Ca(OH)2 and Na2CO3 . Air Fuel Ratio of 1.5 and 800 with the help Ca(OH)2 catalyst tended to produce the optimum result for H2/CO ratio which obtained a value of 1.98. Synthetic gas composition  at this variation reached 33.8% for Hydrogen and 17.1% for Carbon Monoxide.
Development of Simple Kinetic Model on Biogas Production from Co-Digestion of Vinasse Waste and Tofu Residue at Variation of C/N Ratio Syaichurrozi, Iqbal; Rusdi, Rusdi
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10590

Abstract

The Generated Biogas Rate (GBRT) model and the Predicted Maximum Biogas Potential and Yield (PMBPY) model were developed in this work for better understanding of the anaerobic co-digestion of vinasse waste and tofu residue at variation of total carbon/total nitrogen (C/N) ratio which was 3.71, 5.26, 7.30, 32.54, 97.34. Rate constant (k (/day)) and biogas production rate (ū (mL/day)) estimated using GBRT model was 0.071, 0.140, 0.153, 0.150, 0.125 /day and 20.206, 101.393, 111.832, 95.967, 58.616 mL/day respectively for all variables (R2 of 0.925 – 0.976). The maximum biogas potential (Pm) obtained using PMBPY model for all variables was 335.8317, 737.0868, 760.4523, 608.3871, 523.3872 mL respectively (R2 = 0.914 – 0.972). The fitting error between measured biogas and predicted biogas through the developed model was 0.20 – 7.03 %. The developed kinetic model can predict biogas potential with prediction efficiency (%) over modified Gompertz model of 91.71 – 98.57%.

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