<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Ethylene production from ethanol dehydration over mesoporous SBA-15 catalyst derived from palm oil clinker waste"^^ . "The silica-rich palm oil clinker (POC) from oil palm agroindustry is often dumped in landfill. This work investigated the valorisation of POC into Santa Barbara Amorphous-15 (SBA-15) catalyst, the modulation of its surface acidity, and its application in dehydration of ethanol to ethylene. With commercial SBA-15 SBA-15(Comm.) as reference, the successful fabrication of POC-derived SBA-15 POC-SBA-15(pH = 3, 5, and 7) were validated by spectroscopic and microscopic characterisation. From the results of temperature-programmed desorption of ammonia, the SBA-15(Comm.) have high strong acidity while POC-SBA-15 exhibit enriched weak-moderate acidity. For ethanol dehydration over SBA-15 at 200�400 °C, the ethanol conversion (XC2H5OH) and ethylene selectivity (SC2H4) rise with temperature. The catalytic activity was ranked as SBA-15(Comm.) < POC-SBA-15(3) < POC-SBA-15(7) < POC-SBA-15(5). Spent catalysts characterisation unanimously confirms the least carbon deposition on POC-SBA-15(5), which subsequently used to study the effect of initial ethanol concentration and liquid hourly space velocity (LHSV). When 99.5 wt% ethanol diluted to 50 wt%, the competitive adsorption between ethanol and water reduces XC2H5OH but enhances SC2H4. Further ethanol dilution (�30 wt%) deteriorates SC2H4 following remarkable ethanol steam reforming at elevated temperature (�350 °C). For 50 wt% ethanol dehydration over POC-SBA-15(5) at 400 °C, a greater LHSV furnishes a higher ethanol partial pressure that increases XC2H5OH but decreases SC2H4. When LHSV >16 mL/g·h, the saturation of finite active sites with adsorbates renders the drastic declination of XC2H5OH and SC2H4. For ethanol dehydration over POC-SBA-15(5), the optimal conditions are temperature of 400 °C, initial ethanol concentration of 50 wt%, and LHSV of 16 mL/g·h. Fresh POC-SBA-15(5) steadily catalyses the optimal process (73.33% XC2H5OH and 84.70% SC2H4) up to 105 h. Meanwhile, regenerated POC-SBA-15(5) achieves a lower catalytic activity (71.95% XC2H5OH and 81.96% SC2H4). © 2019 Elsevier Ltd"^^ . "2020" . . "249" . . "Elsevier Ltd"^^ . . . "Journal of Cleaner Production"^^ . . . "09596526" . . . . . . . . . . . . . . . . . . . . . . "C.K."^^ . "Cheng"^^ . "C.K. Cheng"^^ . . "K.H."^^ . "Ng"^^ . "K.H. Ng"^^ . . "C.C."^^ . "Chong"^^ . "C.C. Chong"^^ . . "T."^^ . "Witoon"^^ . "T. Witoon"^^ . . "Y.W."^^ . "Cheng"^^ . "Y.W. Cheng"^^ . . "J.C."^^ . "Juan"^^ . "J.C. Juan"^^ . . . . . "HTML Summary of #13342 \n\nEthylene production from ethanol dehydration over mesoporous SBA-15 catalyst derived from palm oil clinker waste\n\n" . "text/html" . .