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Suhendi, Endang
Universitas Sultan Ageng Tirtayasa
Chemical Engineering, Chemistry & Bioengineering

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Synthesis of Alkyd Resin Through Alcoholysis – Polyesterification Process from Used Cooking Oil Pretreatment Using Alkaline Activated Natural Bayah Zeolite Suhendi, Endang; Heriyanto, Heri; Fitri Asyuni, Nadya; Kiki Shahila, Ilham
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17882

Abstract

Waste cooking oil can be treated by an adsorption process using Bayah natural zeolite as raw material for alkyd resin synthesis. This study aimed to determine the optimum conditions for the equivalent ratio of OH:COOH and the temperature of the alkyd resin synthesis. The research was carried out by preparing used cooking oil and Bayah natural zeolite (BNZ), adsorption process, and alkyd resin synthesis through the alcoholysis-polyesterification process. The optimum addition of Bayah natural zeolite-activated NaOH 0.75 N in pretreatment waste cooking oil is 30% weight in terms of color, density, viscosity, and functional group characteristics of the resulting alkyd resin. The characteristics of the alkyd resin product at optimum conditions obtained light brown color with an OH: COOH equivalent ratio of 1.4, and the alcoholysis and esterification temperature at 190 oC with a density value is 1.112 g/cm3, FFA value is 0.1528%, viscosity value is 4808 cP. The ester functional group at wavelengths 1267 cm-1 and 1722 cm-1, the 1H NMR spectrum of the ester group at the peak of 3.5 ppm, and a functional group of 7.6 ppm.
The Effect of Polypropylene and Low-Density Polyethylene Mixtures in the Pyrolysis Process on the Quantity and Quality of the Oil Products Suhendi, Endang; Heriyanto, Heri; Ammar, Muhammad; Tsania, Ayu; Anam, Muhammad Khairul
World Chemical Engineering Journal VOLUME 7 NO. 2 DECEMBER 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i2.23121

Abstract

Plastic waste is a type of waste that has economic value when processed properly, one of which is by converting it into fuel oil using the pyrolysis method. Pyrolysis of plastic waste involves the decomposition of materials at high temperatures without the presence of oxygen. This study aimed to examine the effect of the mixture of polypropylene (PP) plastic waste and low-density polyethylene (LDPE) plastic waste in the pyrolysis process on the quantity and quality of the oil products. The ratio of PP:LDPE was varied to 100 kg : 0 kg, 70 kg : 30 kg, 50 kg : 50 kg, and 30 kg : 70 kg. The pyrolysis was conducted at a temperature of 350ºC for 10 hours. The research results show that the highest yield value of 82.24% wt. is obtained at PP:LDPE ratio of 100 kg : 0 kg. Furthermore, the best pyrolysis oil products are obtained at PP:LDPE ratio of 70 kg : 30 kg. The gasoline, kerosene, and diesel fuel products have densities of 760 kg/m3, 776.4 kg/m3, and 873 kg/m3, respectively. Then, the gasoline and diesel fuel have calorific values of 10,836 cal/g and 10,996.5 cal/g. The cetane number of diesel fuel is 42, while the octane number of gasoline is 78.9.
The Effect of Operating Conditions on the Purification of Waste Cooking Oil over a Natural Zeolite Catalyst Suhendi, Endang; Heriyanto, Heri; Nur Avina, Mely; Andriani, Kharina
World Chemical Engineering Journal VOLUME 6 NO. 1 JUNE 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v6i1.15561

Abstract

The waste of cooking oil is a danger to human health. The Heating of waste cooking oil at high temperatures will cause an increase in free fatty acid (FFA) and peroxide number in the oil. Therefore, waste cooking oil needs to be processed before being reused. This paper studies the effect of operation conditions on the purification of waste cooking oil over a natural zeolite catalyst. The stage of the purification process is despicing, neutralization, and bleaching process. The despicing process injected the steam to remove impurities. The effect of the mass flow rate of oil at 1.051; 0.456 and 0.139 Kg/s on FFA value was studied. After that, the neutralization and bleaching process. The Bleaching process was performed using zeolite adsorbent. The results show that the purification method of waste cooking oil decreases of the color of oil, free fatty acid, and peroxide value.  In this study, the best performance of the despicing process at the mass flow rate of the oil is 0.139 Kg/s, a temperature of 60°C with 500 rpm stirring for the neutralization process and bleaching process of natural zeolite.  The value of free fatty acid content (FFA) is 2.22 mg. KOH/mg fat, peroxide is 6.98 mekO2/kg, color degradation is 66.93% and water content is 0.32% (w/w).
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.
The effect of Temperature Drying of Seaweed, Addition of Calcium Hypochlorite, and Potassium Hydroxide on the Quality of Semi-Refined Carrageenan Products Heriyanto, Heri; Astria, Windi; Fattah, Hanif Al; Suhendi, Endang
World Chemical Engineering Journal VOLUME 7 NO. 2 DECEMBER 2023
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v7i2.23042

Abstract

Indonesia is a major producer of Eucheuma cottonii seaweed, yet its utilization remains suboptimal. Approximately 80% of seaweed exports consist of raw materials with low market value. The research aims to enhance the quality and market value of seaweed by transforming it into semi-refined carrageenan products. The method used for carrageenan production involves extraction using a KOH solution with different concentration levels using 5%, 7.5%, and 10% (w/v), along with drying temperatures ranging from 80°C to 90°C. Additionally, bleaching treatment is applied using calcium hypochlorite with concentration level using 1.5% and 2.5% (w/v). The analyses conducted include water content, ash content, yield, viscosity, gel strength, and degree of whiteness. The optimal results for semi-refined carrageenan, based on yield analysis, water and ash content, gel strength, viscosity, and degree of whiteness, were obtained from samples with a KOH concentration of 10%, calcium hypochlorite concentration of 1.5%, and drying temperature of 80°C.
Eco-Friendly Transformation and Energy Efficiency in Methanol-to-Olefins (MTO) Processes: Innovations Toward Sustainable Olefin Production Heriyanto, Heri; Rochmat, Agus; Suhendi, Endang; Pujiastuti, Hendrini; Wardalia, Wardalia; Kanani, Nufus
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.30231

Abstract

Uncertainty regarding global crude oil prices has raised concerns for industry players, including the intermediate chemical industry such as olefins. The possibility of oil prices rising unpredictably makes the production of olefins from naphtha less attractive. On the other hand, abundant reserves of coal and natural gas are being considered as the foundation for developing the olefin industry based on gasification processes. The process routes include the formation of synthetic gas (SynGas) consisting of Hydrogen and Carbon Monoxide (H2 and CO), Methanol production from SynGas, and Olefin production from Methanol (MTO). This review aims to provide an overview of MTO and future developments related to the diversification of processes and technologies for the commercial production of olefins. Current research development on the Methanol-to-Olefins (MTO) process has narrowed down to three main areas, including: (1) Catalyst modification to increase reaction yield (particularly C2 and C3 products), (2) Determination of detailed reaction mechanisms in olefin formation, and (3) Catalyst deactivation processes in MTO.
Co-Authors Anam, M. Khairul Andriani, Kharina Astria, Windi Fattah, Hanif Al Fitri Asyuni, Nadya Heri Heriyanto Heriyanto, Heri Kanani, Nufus Kiki Shahila, Ilham Muhammad Ammar Nasheh, Muhammad Yusril Nur Avina, Mely Pujiastuti, Hendrini Rizqillah, Muhammad Fathi Rochmat, Agus Tsania, Ayu Wardalia, Wardalia