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Journal : ASEAN Journal of Chemical Engineering

Optimization for Production Tert-Butyl Oleyl Glycoside Nonioic Surfactant Using Response Surface Methodology Harsa Pawignya; Tutuk Djoko Kusworo; Bambang Pramudono
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.703 KB) | DOI: 10.22146/ajche.49537

Abstract

The development of surfactant production process strongly influenced by the potential use of raw materials and products that are environmentally friendly. For raw materials such as surfactants are carbohydrate-based material utilization example, glucose, which is reacted with tert-butanol, to form tert-butyl glycoside (TBG), then TBG can be esterified with oleic acid forming surfactant tert-butyl oleyl glycoside (TBOG). This study aims to obtain the optimum conditions TBOG production process of esterification reactions TBG and oleic acid catalyst the para toluene sulfonic acid using response surface method to reach optimum yield TBOG. The independent variable used is the mole ratio of TBG with oleic acid, percent of the catalyst and a temperature. Optimization results obtained optimum conditions of mole ratios of 1: 4.096; 2.33 percent of the catalyst and the temperature of 96.04 °C with a TBOG yield of 92.46%, with a TBOG content of 91.72 %. Based on the HLB value of the surfactant TBOG is 3.87, then these surfactants can be used as an emulsifier of water-in-oil.
Study of Polymeric Membranes Potential for Eugenol Purification from Crude Clove leaf Oil Tutuk Djoko Kusworo; Danny Soetrisnanto; Widayat Widayat; Budiyono Budiyono; Dani Puji Utomo
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.391 KB) | DOI: 10.22146/ajche.49539

Abstract

Clove oil is an agricultural commodity with economic value. This essential oil can be obtained from flowers, stems, and leaves of clove plants. The quality of clove oil can be evaluated from eugenol levels in oil. An increase in eugenol levels from 70% to 98% can increase oil prices by up to 3 times. Oil obtained from clove leaves has a low eugenol content of 60-70%, therefore the purification is needed to improve the quality of oil. Membrane based separation for eugenol purification was suggested in this paper as new concept in essential oils purification processes. This study aimed to explore the suitable polymer as membrane material for eugenol purification. PES, PA, CA and PI were used in this study, where the membranes were prepared via NIPS technique using manual casting knife to form flat sheet membranes. The membranes were immersed in eugenol to evaluate the solubility. The insoluble membrane was used for purification performance test in membrane filtration cell. The results show that PES and PA membranes were completely dissolved in eugenol in less than 1 minute, while PI and CA membranes were insoluble in eugenol. However, the PI membrane has much lower solvent permeability than CA membrane. The thermal annealed PES membrane for 3 h at 180°C dissolved in eugenol in 30 minutes for complete dissolution. It is concluded that PI and CA membranes can be used as membrane material for eugenol purification but CA more favorable, while PES membrane has a potential for similar purposes after being thermal annealed. However, these findings can offer an important reference for the application of polymeric membranes for clove oil purification through an effective and efficient process.
Current Trend of MOFs Incorporated Membranes for Advanced Wastewater Treatment Utomo, Dani Puji; Kusworo, Tutuk Djoko; Kumoro, Andri Cahyo; Budiyono, Budiyono; Kurniawan, Tonni Agustiono
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.83845

Abstract

Membrane technology has gained attention in wastewater treatment due to its great potential for producing high-grade water products for reuse. The membrane also effectively removes persistent pollutants in water effluent. However, their application is constrained by low productivity due to fouling formation. Incorporating functionalized nanoparticles into polymeric membranes has attracted much attention due to the improved membrane performance and additional features. Metal-organic frameworks (MOFs) incorporated into polymeric membranes have been widely applied in reverse osmosis (RO), forward osmosis (FO), nanofiltration (NF), and microfiltration (MF) for water and wastewater treatment. This short review presented recent findings, fabrication methods, and a systematic understanding of transport mechanisms under various operating conditions. This study also focused on several important parameters, such as improving physicochemical properties, membrane features, and performance enhancement in wastewater treatment. The reported studies show that MOFs incorporated membranes have reached >95% organic pollutants and 100% suspended solids. The membrane durability was also enhanced up to 140%, and the flux recovery can be maintained at 98% after several cycles. Even some MOFs, such as ZIF-8 and UiO-66, exhibited excellent performance in harsh conditions (pH < 4). The prospects and challenges of MOFs-incorporated membranes in industrial applications were also provided in this study.