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Gas phase selective conversion of glycerol to acrolein over supported silicotungstic acid catalyst
Amin Talebian-Kiakalaieh,Nor Aishah Saidina Amin,Zaki Yamani Zakaria 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
Gas phase dehydration of glycerol to acrolein over a series of supported HSiW on ZrO2 and nano-sized g-Al2O3 catalyst has been investigated. The characterization results revealed that impregnation of g-Al2O3nanoparticles increased the specific surface area, pore diameter, and thermal stability of the supportedcatalysts. The highest acrolein selectivity of 88.5% at 97.0% glycerol conversion was achieved over 0.5 g30HZ-20A catalyst in 3 h at glycerol feed concentration of 10 wt%, temperature = 300 ?C andTOF = 136 h 1. The coke deposition has no significant effect on the activity of 30HZ-20A catalyst. Indeed, the catalyst was stable even after 40 h.
Emulsion liquid membrane stability in the extraction of ionized nanosilver from wash water
Raja Norimie Raja Sulaiman,Norasikin Othman,Nor Aishah Saidina Amin 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
The discharge of ionized nanosilver into environment triggers a great concern owing to the toxicity problem for aquatic organism. In this study, emulsion liquid membrane used to extract the ionized nanosilver from wash water. Variables like carrier, stripping agent and surfactant concentrations, emulsifying time, homogenizer and agitation speed, pH feed phase, and effect of ionic liquid [BMIM]+[NTf2]- were investigated. The membrane phase containing Cyanex 302, Span 80, acidic Thiourea, and kerosene as carrier, surfactant, stripping agent, and diluent respectively. Results demonstrated that 99.89% of silver ion was extracted and ionic liquid show good performance on emulsion stability with 10% swelling.
Mohamad Azuwa Mohamed,M. F. M. Zain,Lorna Jeffery Minggu,Mohammad B. Kassim,Juhana Jaafar,Nor Aishah Saidina Amin,Mohd Sufri Mastuli,Hao Wu,Roong Jien Wong,Yun Hau Ng 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The in-situ hierarchical heterojunction photocatalyst consists of C-doped g-C3N4 (CCN) grafted on the C, Nco-doped ZnO were successfully realized via simple bio-template hydrothermal approach. The resultantshierarchical heterojunction photocatalyst exhibited excellent UV to the near infrared absorptioncapability. The electrochemical analysis and photoluminescence spectroscopy revealed that thehierarchical heterojunction photocatalyst possessed excellent charge generation and separationefficiency. The resultant hierarchical heterojunction photocatalyst exhibited remarkable photocatalyticperformance in the photodegradation of bisphenol A and photocatalytic hydrogen evolution undersimulated solar irradiation. The enhancement of photocatalytic performance was mainly attributed tothe combined effect of hierarchical morphology, in-situ doping, and heterojunction formation.