PMID- 27029238 OWN - NLM STAT- MEDLINE DCOM- 20170127 LR - 20181113 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 6 DP - 2016 Mar 31 TI - Effective heterogeneous transition metal glycerolates catalysts for one-step biodiesel production from low grade non-refined Jatropha oil and crude aqueous bioethanol. PG - 23822 LID - 10.1038/srep23822 [doi] LID - 23822 AB - The utilization of bioethanol as the alcohol source for biodiesel production is more environmentally advantageous over methanol owing to its lower toxicity, lower flammability and its sustainable supply from renewable agricultural resources. However, as the presence of water in crude bioethanol is the critical factor limiting the biodiesel production process, the energy-intensive and costly purification of bioethanol is necessary for biodiesel application. Manganese glycerolate (MnGly) is reported the first time here as a robust heterogeneous catalyst that exhibited over 90% conversion by using aqueous ethanol containing 80 wt.% of water in the production of fatty acid ethyl ester (FAEE). The employment of 95 wt.% ethanol with respect to water could achieve 99.7% feedstock conversion in 6 hours under the optimal reaction conditions: reaction temperature (150 degrees C), feedstock-to-ethanol molar ratio (1:20) and catalyst loading (6 wt.%). Commercially available low grade crude bioethanol with the presence of impurities like sugars were applied which demonstrated remarkable catalytic activity in 24 hours. The high water tolerance of MnGly towards biodiesel production could eventually simplify the purification of bioethanol that consumes less energy and production cost. FAU - Lau, Pak-Chung AU - Lau PC AD - Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. AD - Shenzhen Research Institute of The Hong Kong Polytechnic University, Shenzhen 518057, China. FAU - Kwong, Tsz-Lung AU - Kwong TL AD - Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. AD - Shenzhen Research Institute of The Hong Kong Polytechnic University, Shenzhen 518057, China. FAU - Yung, Ka-Fu AU - Yung KF AD - Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. AD - Shenzhen Research Institute of The Hong Kong Polytechnic University, Shenzhen 518057, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160331 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (Biofuels) RN - 0 (Esters) RN - 0 (Fatty Acids) RN - 0 (Plant Oils) RN - 059QF0KO0R (Water) RN - 3G0H8C9362 (Cobalt) RN - 3K9958V90M (Ethanol) RN - 42Z2K6ZL8P (Manganese) RN - E1UOL152H7 (Iron) RN - J41CSQ7QDS (Zinc) RN - PDC6A3C0OX (Glycerol) SB - IM MH - *Biofuels MH - Catalysis MH - Cobalt/chemistry MH - Esters MH - Ethanol/*chemistry MH - Fatty Acids/*chemical synthesis MH - Glycerol/analogs & derivatives/chemistry MH - Iron/chemistry MH - Jatropha/*chemistry MH - Kinetics MH - Manganese/*chemistry MH - Plant Oils/*chemistry MH - Water/chemistry MH - Zinc/chemistry PMC - PMC4814873 EDAT- 2016/04/01 06:00 MHDA- 2017/01/28 06:00 PMCR- 2016/03/31 CRDT- 2016/04/01 06:00 PHST- 2015/11/27 00:00 [received] PHST- 2016/03/15 00:00 [accepted] PHST- 2016/04/01 06:00 [entrez] PHST- 2016/04/01 06:00 [pubmed] PHST- 2017/01/28 06:00 [medline] PHST- 2016/03/31 00:00 [pmc-release] AID - srep23822 [pii] AID - 10.1038/srep23822 [doi] PST - epublish SO - Sci Rep. 2016 Mar 31;6:23822. doi: 10.1038/srep23822.