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论文类型：期刊论文

发表时间：2012-03-01

发表刊物：FUEL

收录刊物：SCIE、EI

卷号：93

期号：1

页面范围：468-472

ISSN号：0016-2361

关键字：Biodiesel; Calcined sodium silicate; Transesterification mechanism; Solid catalyst

摘要：Solid calcined sodium silicate (CSS) was successfully used to produce biodiesel from vegetable oil, but its transesterification mechanism is still not well-understood. In this work, stability tests confirmed that some active basic species were leached into methanol from CSS. FT-IR spectra and density functional theory were employed to deduce the mechanistic route of transesterification reactions catalyzed with CSS. It was confirmed that alkaline active species were formed from the ion-exchange between CSS and CH3OH. Deactivated CSS can be reused by regenerating the active sites using a simple method found by us. (C) 2011 Elsevier Ltd. All rights reserved.