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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 8 NO.1 JUNE 2024" : 5 Documents clear
The Influence of Natural Bayah Zeolite on the Pyrolysis Process of Liquid Fuel Based on HDPE and PP Plastic Waste Heriyanto, Heri; Suhendi, Endang; Nasheh, Muhammad Yusril; Rizqillah, Muhammad Fathi; Wardalia, Wardalia; Pujiastuti, Hendrini
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.26617

Abstract

Pyrolysis is a decomposition reaction method involving the heating of a material with little or no oxygen. The objectives of this research are to utilize plastic waste for the production of liquid fuel and determine the optimal conditions for maximizing liquid fuel yield. The pyrolysis method was used at a temperature of 350°C for 300 minutes with High-Density Polyethylene (HDPE) and Polypropylene (PP) plastic as raw materials in composition variations of 7:3, 5:5, and 3:7, and the Bayah natural zeolite catalyst was activated and varied in amounts of 0%, 3%, and 5%. The analysis included yield tests, density tests, viscosity tests, calorific value tests, and the composition analysis of the liquid product yield.The results of this research indicated that the highest liquid product yield was obtained with a composition of 30% HDPE, 70% PP, and 0% catalyst, achieving a yield of 66.4%. It was concluded that the activated Bayah natural zeolite catalyst was not sufficiently effective in the pyrolysis process at a temperature of 300°C. The highest density and viscosity values were obtained with a composition of 70% HDPE, 30% PP, and 0% catalyst, which were 0.764 g/cm³ and 0.789 cP, respectively. The highest calorific value was obtained with a 50% HDPE and 50% PP composition, reaching 10,978.8 Cal/g. The composition analysis of the liquid product yield for a 70% HDPE and 30% PP composition resulted in 42% gasoline and 58% kerosene. For a 30% HDPE and 70% PP composition, the yield was 30% gasoline, 62% kerosene, and 8% diesel.
Risk Analysis Using HIRADC Method (Hazard Identification Risk Assessment and Determining Control) in the Palm Oil Processing Plant of PT. Perkebunan Nusantara VII Unit Bekri Lampung Tengah Hasiany, Sillak; Difa, Geta Fatonah; Awan, Fajriharish Nur; Prasetio, Bambang
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.20632

Abstract

The palm oil processing plant of PT. Perkebunan Nusantara VII Unit Bekri Lampung Tengah is subject to various risks that need to be identified and assessed for effective control measures. This research aims to conduct a comprehensive risk analysis using the HIRADC (Hazard Identification Risk Assessment and Determining Control) method in the palm oil processing plant. The study involves the identification of hazards, assessment of risks associated with these hazards, and the determination of appropriate control measures. Data for the risk analysis are collected through literature review, field observations, interviews, and questionnaire surveys. The results of the analysis highlight the identified risks and their corresponding risk levels. The risk analysis reveals 10 work areas with 4 types of risk hazards and 84 risk identifications, categorized as 22 high-level risks, 13 medium-level risks, and 49 low-level risks By applying the HIRADC method, suitable control measures are recommended based on the hierarchyof risk control, including hazard elimination, engineering controls, administrative controls, and the use of personal protective equipment. This research provides valuable insights into risk management practices in the palm oil processing industry, specifically in PT. Perkebunan Nusantara VII Unit Bekri Lampung Tengah, and can serve as a foundation for improving occupational safety and health in similar industrial settings.
The Utilization of Zeolite from Laundry Waste Processing as a Soil-zeolite Growing Media for Corn Plant Maryani, Yeyen; Herayati, Herayati; Petrus, Dhannydon; Simatupang, Petrus Edison
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.25895

Abstract

Laundry waste containing detergent can release large amounts of Linear Alkylbenzene Sulfonate (LAS), as an active compound, and phosphates into the groundwater. One method for solving this problem is adsorption using natural zeolite. In this study, an innovation was made to utilize zeolite resulting from the processing of laundry wastewater as a growing media with soil for corn plants. The research methodology included activation of Bayah-Banten natural zeolite, adsorption process of LAS and phosphate from laundry waste by varying the contact time (0-60 minutes) and stirring speed (150-350 rpm), analysis of LAS and phosphate content, application of zeolite, obtained from waste treatment, as a soil-zeolite growing media for corn plants, and analysis of corn morphology (stem height, stem circumference and number of leaves).The results showed that the treatment of laundry waste using the adsorption method can reduce the concentration of LAS and phosphate in wastewater. The lowest LAS concentration was obtained at a stirring speed of 300 rpm and a contact time of 60 minutes, from 0.206312 mg/L (initial LAS) to 0.13747 mg/L (final LAS). The lowest phosphate concentration was obtained at a stirring speed of 350 rpm and contact time of 60 minutes, from 0.272184 mg/L (initial phosphate) to 0.06658 mg/L (final phosphate). The application of zeolite as a growing media with a ratio of soil and zeolite of 75:25 showed a good result in the morphology of corn plants, growth in stem height of 67.74% and stem circumference of 41.67%.
Engineering and Fabrication of TiO2 Photocatalyst: review Pujiastuti, Hendrini; Kustiningsih, Indar
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.25787

Abstract

The photocatalytic reactions occurring on the surface of TiO2 photocatalysts are crucial factors determining the kinetics and mechanisms of photocatalytic reactions. Photocatalyst engineering, especially of TiO2, is important due to various applications in photocatalytic processes. This review paper presents the engineering of materials and fabrication processes for TiO2 photocatalysts. Material catalyst engineering includes the development of TiO2 composites with magnetic materials, other additives, and doping. With the development of the chitosan-TiO2 coating to create the nanocomposite film, red grapes could be effectively protected against microbial infection and have their shelf life increased. F-doping on TiO₂ can increase the amount of photocatalytic oxidative species, encourage electron separation, and improve visible light absorption. To improve the effectiveness of removing the photocatalyst from the treated liquid waste once the procedure is finished, magnetic particles are added to photocatalysts. Fabrication methods for TiO2 modification to obtain specific crystal structures, including hydrothermal methods, anodization, and template-assisted techniques, will also be discussed. Another important factor is the duration of the hydrothermal treatment; nanotubes are generated after more than 12 hours. In contrast to diluted solutions, longer nanotubes will be produced during the Ti anodization process when concentrated electrolyte solutions, such as ethylene glycol and glycerol, are used.
The Effect of HCl Concentration on The Activation of Bentonite as A Catalyst in The Pyrolysis Process of Polypropylene (PP) Plastic Waste at The Integrated Waste Management Facility of Asari Cilegon Suhendi, Endang; Heriyanto, Heri; Anam, Muhammad Khoirul; Aulia, Anida; Putri, Rizki Amalia; Wardalia, Wardalia
World Chemical Engineering Journal VOLUME 8 NO.1 JUNE 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v8i1.26466

Abstract

Pyrolysis is the process of heating a substance without the presence of oxygen, causing the decomposition of plastic materials (polymers). Pyrolysis is used as an alternative to reduce the amount of plastic which is a source of environmental problems. This research aimed to determine the effect of HCl concentration on bentonite catalyst activation on the liquid product yield of pyrolysis of polypropylene (PP) plastic waste and to determine the characteristics of the liquid pyrolysis products. This research was carried out in several stages including raw material preparation, catalyst activation, and pyrolysis process. In bentonite catalyst activation, the HCl concentration was varied to 0.25, 0.50, and 0.75 M. The results showed that the highest liquid product yield was obtained at a concentration of 0.50 M, namely 76% with a product density range of 0.7452-0.762 g/ml. The heating value of the liquid product at 0.50 M HCl activated bentonite was 6806.48 cal/g. Through GC-MS analysis, the liquid product contained 2,4-Dimethyl-1-heptene with an area of 8.21% and a retention time of 3.626. Based on XRD analysis, the bentonite contained minerals of montmorillonite, kaolinite, and quartz.

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