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Novel continuous ultrasonic contactor system for CO2 absorption: Parametric and optimization study
Siti Munirah Mhd Yusof,Kok Keong Lau,Azmi Mohd Shariff,Wee Horng Tay,Nur Farhana Ajua Mustafa,Serene Sow Mun Lock 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
High frequency ultrasonic-assisted absorption in a batch system has shown significant enhancement forCO2 removal. Nevertheless, its performance in continuous mode has yet to be studied. A novel continuoushigh frequency ultrasonic contactor system for CO2 capture has been developed to study the effect of gasflow rate (15–25 SLPM), liquidflow rate (0.1–0.5 SLPM), pressure (10–50 bar) and voltage (0–30 V) on theabsorption performance. A validated quadratic model was developed, and the optimum condition wasidentified using central composite design coupled with response surface methodology. Based on theresults, current system demonstrated better absorption performance as compared to other contactors.
Thermodynamic and kinetic effect of biodegradable polymers on carbondioxide hydrates
Sana Yaqub,Bhajan lal,Lau Kok Keong 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
In this work, the effect of biodegradable polymers, i.e. pectin (PC), sodium-carboxymethyl cellulose (Na-CMC), tapioca starch (TS) and dextran (DX) on thermodynamics and kinetics of CO2 hydrates areevaluated on sapphire hydrate reactor. The CO2 hydrate liquid vapour equilibrium (HLwVE) data isevaluated in the presence of biopolymers (1.5 wt%) using isochoric T-cycle method at temperature andpressure ranging from 278.7 to 283.0 K and 2.3 to 4.3 MPa respectively. The effect of biopolymers onHLwVE curve is reported by measuring average increment temperature (DÜ). The constant coolingmethod is used to evaluate the kinetics of CO2 hydrates at 4.3 MPa in the presence of biopolymers (0.12–1.5 wt%) at 274.15 K and 277.15 K. The inhibition effect of biopolymers on the kinetics of CO2 hydrate isreported by measuring induction time, hydrate formation rate and amount of gas consumed. The kineticinhibition strength of biopolymers is compared with poly-N-vinylpyrrolidone (PVP) and with two noncommercialinhibitors, i.e. glycine and tetra-methyl ammonium chloride (TMACl) through relativeinhibition strength (RIS). Results reveal that DX shows maximum increment temperature of 0.36 K. WhilePC and Na-CMC delayed CO2 hydrate nucleation for 423 and 181 min respectively. Additionally,biodegradation study on biopolymers indicates that, compared to PVP, biopolymers are easilybiodegradable and show potential for gas hydrate offshore applications.
Norwahyu Jusoh,Yin Fong Yeong,Weng Leong Cheong,Kok Keong Lau,Azmi M. Shariff 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.44 No.-
Membrane separation has been used successfully in numbers of industrial applications especially in CO2removal from CH4 because it’s involved less energy consumption and low maintenance. The aim of thisresearch is to fabricate ZIF-8/6FDA-durene mixed matrix membranes for enhancement of CO2 captureand consequently to optimize its fabrication method. The results showed that membrane fabricatedusing total dispersion duration of 3 h withfiller priming procedure demonstrated homogenousdistribution of ZIF-8 in 6FDA-durene matrix and improved the separation performance. Therefore, themembrane is potential for the large scale production via the method optimized in this work.
Firas A. AbdulKareem,Azmi Mohd. Shariff,Sami Ullah,Tan Lian See,Lau Kok Keong,Nurhayati Mellon 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.64 No.-
In this work GERG2008 EoS was incorporated in a volumetric-gravimetric-chromatographic technique. The system utilized to measure in-mixtures components experimental selective isotherms individually, with the ability to analyze water vapor–gas components in the same mixture. 5A zeolite was used as a solid adsorbent for binary and ternary CO2/CH4/H2O mixtures adsorption at 50 °C and 70 °C temperature up to 10 bar pressure. Artificial neural network (ANN) modeling was applied to predict ternary and binary gaseous with the presence of water mixtures. This study delivered better clarification in the field of selectivity and reliability in the term of multicomponent and dual phase mixtures analysis.