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Bamidele V. Ayodele,Chin Kui Cheng 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
In the present study, synthesis gas was produced from dry reforming of methane over ceria supportedcobalt catalyst in a fixed bed stainless steel reactor. Artificial neural network (ANN) and Box Behnkendesign (BBD) were employed to investigate the effects of reactant partial pressures, reactant feed ratios,reaction temperature and their optimum conditions. Good agreement was shown between the predictedoutputs from the ANN model and the experimental data. Optimum reactant feed ratio of 0.60 and CH4partial pressure of 46.85 kPa were obtained at 728 8C with corresponding conversions of 74.84% and76.49% for CH4 and CO2, respectively.
Evaluation of Reinforced and Green Bioplastic from Carrageenan Seaweed with Nanocellulose
Fatmawati Adam,Nor Amira Othman,Nur Hidayah Mat Yasin,Chin Kui Cheng,Nurul Aini Mohd Azman 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
In this work, bioplastic was formulated through the incorporation of cellulose into refined carrageenan. Threedifferent sizes of cellulose were used microcrystalline cellulose (MCC), cellulose nanowhisker (CNW) and nanofibrillatedcellulose (NFC). The CNW was mechanically nano-grinded and NFC was ultrasonicated to produce nano particle for MCC. The CNW has the smallest particle size distribution and an average size of 54 nm. The abundance of hydroxyl groups in thecellulose structure forms intermolecular interactions with the carrageenan and increases the viscosity (293.90 mPas), shearstress (27.90 Pa) and tensile strength (19.87 MPa) of Carra-CNW bioplastic. This revealed increasing intensity and a shift of1H-NMR due to hydrogen becoming closer to an electronegative atom in both micro and nano size cellulose. At a largercellulose size, Carra-MCC is thermally stable and the activation energy (Ea) is 73.81 kJ/mol higher than Carra-CNW Ea at47.14 kJ/mol. Cellulose incorporated into a carrageenan matrix is a potential eco-material that could replace conventionalplastic where the sample decomposes up to 65 % of the initial weight in biodegradability and compostability test. The watervapour permeability value is in the range of 3.43 to 4.09×10-14 g s-1 m-1 Pa-1. In conclusion, carrageenan incorporated withcellulose potentially suitable for uses such as food packaging applications based on the results of the mechanical strength,thermal stability and decomposition tests conducted.
Mohd Nasir Nor Shahirah,Jolius Gimbun,Sook Fun Pang,Rossyuhaida Mohd Zakria,Chin Kui Cheng,Gek Kee Chua,Mohd Fazli Farida Asras 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
This paper presents the influence of nutrient addition namely MgSO4, C3H7NO2, (NH4)2SO4 and Na2HPO4 to the bioethanol yield from oil palm trunk saps (OPTS) with fermentation carried out by Saccharomyces cerevisiae. The sugar and ethanol contents in the sample were determined using a high-performance liquid chromatography. Nutrient addition has improved the bioethanol yield markedly, with the average yield ranged from 58.50% to 77.12% compared to about 51.08% without nutrient addition. The highest bioethanol yield (81.89%) was achieved by adding MgSO4. The rank of nutrient influence on improving the bioethanol yield was MgSO4 > C3H7NO2 > (NH4)2SO4 > Na2HPO4