Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/27612
ชื่อเรื่อง: Characterization of rare earths obtained from monazite concentrate processing and their application in esterification for biodiesel production
ผู้แต่ง: Rattanaphra D.
Kingkam W.
Nuchdang S.
Suwanmanee U.
Keywords: Biodiesel
Calcination temperature
Cerium
Lanthanum
Neodymium
วันที่เผยแพร่: 2022
สำนักพิมพ์: Elsevier Ltd
บทคัดย่อ: Rare earths namely lanthanum (La), neodymium (Nd) and cerium (Ce) obtained from the monazite concentrate processing were comprehensively characterized using XRF, XRD, FTIR, N2 adsorption–desorption, CO2/NH3-TPD and SEM to reveal their catalytic performance in esterification of oleic acid for biodiesel production. The effect of calcination temperatures (500–1000 °C) on the catalyst properties and biodiesel conversion was also investigated. The catalytic performances of the catalysts were tested under the conditions of catalyst loading 3 wt%, molar ratio of oil to methanol 1:20, reaction temperature 200 °C, stirring rate 600 rpm for 5 h. It is interesting that the Ce catalyst calcined at 1000 °C showed the best performance and the highest FAME content of 78.54% could be achieved, even its acid sites was very low, which is probably associated to the availability of oxygen vacancies at high calcination temperature. The La catalysts calcined at 600 °C exhibited the balancing of strong Lewis acid and Lewis basic sites, which is related to the catalytic activity with FAME content of 74.44%. For the catalytic performance of Nd catalysts, the FAME content of 63.60% was obtained at calcination temperature of 500 °C, which was lower than those La and Ce catalysts. © 2022 The Author(s)
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130943851&doi=10.1016%2fj.egyr.2022.05.022&partnerID=40&md5=ae8401f1ff4eb6ec6ad855e62bd8816c
https://ir.swu.ac.th/jspui/handle/123456789/27612
ISSN: 23524847
Appears in Collections:Scopus 2022

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