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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 5 NO. 2 DECEMBER 2021" : 5 Documents clear
Sensors and Mini Photocatalytic Reactor as a Tool for Measure CO2 Gas from the Degradation of the Detergent Active Compound Maryani, Yeyen; Ruhiat, Yayat; Oktarisa, Yuvita
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12289

Abstract

This study aims to test the performance and feasibility of new tools and methods for analysis of detergent based on the photocatalytic degradation of LAS and ABS, which is a detergent active compound. Testing is done by measuring the CO2 gas formed from the degradation at every one-hour for five hours of reaction. The results of the determination of analytical parameters are as follows, sensitivity: 0.394 to 0.460, the limit of detection: 0.16 mg/L, accuracy: 0.94% to 12.88% and punctilio: 0.12% to 0.14%, the range of linearity: 0.4 mg/L to 2 mg/L. Results of calibration using standard solutions obtained regression equation y = 1.033 x - 77.713 with R2 = 0.988, indicating that the instrument has been calibrated and fit for use for the analysis of LAS and ABS with concentrations above or equal to 25 mg/L. The test results showed that the developed method is practical, effective and efficient.
Centrifugal Concentration of Mandailing Natal North Sumatera Gold Ores Using Knelson Concentrator Oediyani, Soesaptri; Triana, Tiara; Ifzan, Ifzan; Mamby, Hasudungan Eric
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12974

Abstract

Gravity concentration is the type of separation process of minerals based upon the difference in density. This technique has been known for centuries. It has the ability to separate the valuable minerals with relatively low production cost and little environmental impact, such as gold ores. Separation of gold from gangue minerals by using gravity concentration has been used for decades. In fact, it has the limitation to process fine particles. In attempt to recover fine particles using gravity concentration methods, the technique has been developed by combining centrifugal force. One of wellknown devices, Knelson Concentrator, was used to separate gravity recoverable golds (GRG) from the gangue minerals of Mandailing Natal (North Sumatera) sulfide complex gold ores with -200# of particle size. The head grade of ores was 5 g/t of gold. The ores were separated by using Knelson Concentrator with variation of pulp density, feeding rate, and water fluidization pressure. The results have proved that these three variables have particular impacts on gold recovery. The recovery of gold was increased by the increasing of pulp density until it reached the optimum level in 25% of solid with 86.9% of gold recovered, and then decresed by increasing of pulp density into 84.88% of gold with 30% of solid in pulp. It has the same trends in variation of feeding rate and water fluidization pressure. The highest point with 87.08% of recovery and 17.88 g/t of concentrate grade was anchieved at 25% of solid, 0.7 kg/minutes of feeding rate, and 2.7 kg/cm2 of water fluidization pressure.
A review of encapsulation using emulsion crosslinking method Jayanudin, Jayanudin; Heriyanto, Heri
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12312

Abstract

Encapsulation is a process to protect active components or other materials in the form of liquids, solids, and gases which are sensitive to the environment using coating materials. Encapsulation can be used for the pharmaceutical, food, beverage, textile, and other industries. The encapsulation method has been developed depending on the active ingredient being protected and its function. The encapsulation method is generally divided into chemical and mechanical methods. This review aims to explain the emulsion crosslinking which is one of the encapsulation methods. This method was easy and simple, just add a crosslink agent to the emulsion and then the microparticles formed were washed, filtered, and dried. This review also reports several encapsulation studies using the emulsion crosslinking method.
Alteration of The Properties of Spent Eucalyptus Biomass from Steam Distillation Yani, Syamsuddin; Yani, Setyawati
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12615

Abstract

Steam distillation is a common method to extract the eucalyptus oil from eucalyptus biomass. The spent biomass of the steam distillation process could be used as biofuel feedstock. This study aims to investigate the effect of eucalyptus biomass steam distillation time on the alteration of the spent biomass.  The properties studied include carbon retention, fuel properties namely proximate and ultimate analyses as well as grindability. Those properties were investigated from 5 to 180 minutes of the distillation time. The grindability and fuels chemistry of spent biomass were little affected by the steam distillation process. The results show that to use the spent biomass of steam distillation as a feedstock for bioenergy production it is quite promising.
Corrosion Analysis on AMS 4050 Aluminum Metal in an Extreme Acid Rain Environment by Weight Loss Method Arwati, I Gusti Ayu; Alva, Sagir; Fadilah, Arif; Maryani, Yeyen
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12613

Abstract

AMS 4050 aluminum metal which is a type of aluminum, with no Zn content, that composed of 5.7 - 6.7%Cu 2 - 2.6%, Mg 1.9 - 2.6%, Zr 0.15%, Si 0.15% and Mn 0.1% others 0.15% each. The advantage of aluminum is that it weighs only 2.7 gr / cm3, corrosion resistant, good electrical and heat transmitter, easy to fabricate or forge. This AMS 4050 material is widely used in the expansion industry to be used as an aircraft frame. MS 4050 aluminum is more resistant to cracking than other types of aluminum, however cracks can still occur due to corrosion due to acid rain. The test method used to calculate the corrosion rate is the weight loss method. The corrosion rate test results obtained with mean values for immersion of 1, 2, 3, and 4 weeks were 0.03, respectively; 0.07; 0.1 and 0.12 mg / cm2 h. EDX test results showed that the aluminum content in AMS 4050 metal decreased by 18.18%.

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