|Title:||Biodiesel produced from catalyzed transesterification of triglycerides using ion-exchanged zeolite Beta and MCM-22||Authors:||Wang Y.-Y.
|Keywords:||Beta;Biodiesel;Ion exchange;MCM-22;Transesterification;Zeolite||Issue Date:||2014||Journal Volume:||61||Start page/Pages:||933-936||Source:||Energy Procedia||Abstract:||
In this work, biodiesel production from catalyzed transesterification of triglycerides with excess methanol was studied by using ion-exchanged Zeolite Beta and MCM-22 as heterogeneous catalysts. Zeolite Beta and MCM-22 were synthesized with hydrothermal processes and, subsequently, modified by ion-exchanged with alkali ions. These as-obtained zeolite catalysts could yield a high conversion of triglycerides to biodiesel. The conversion efficiency was largely affected by crystallinity and frameworks of zeolite support, pH value of alkali ion-exchange solutions and alkali loadings onto the zeolite support. Furthermore, the effects of the duration of the sodium ion-exchange process on the final conversion efficiency of triolein to biodiesel, both the as-prepared Zeolite MCM-22 and Zeolite Beta catalysts were used. The effect of the duration of the sodium ion-exchange process is insignificant in transesterification using Na-ion-exchanged Zeolite MCM-22 catalysts from 0.5 to 4 h. In contrast, the conversion efficiency of triolein to biodiesel reached ca. 95% in 0.5 hours of transesterification using Zeolite Beta ion-exchanged with 3 mmol-eq. Na+/g cat for 0.5 hours. ? 2014 The Authors.
|Appears in Collections:||化學工程學系|
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