http://www.sciencedirect.com/science/article/pii/S0016236115007085
Biodiesel production optimization using monolithic catalyst in a
fixed-bed membrane reactor
Wei Xu, Lijing Gao, Guomin Xiao
Highlights
•
Ca–Mg–Al hydrotalcite was in-situ synthesized on honeycomb ceramic.
•
A new monolithic catalyst was used for biodiesel production in
membrane reactor.
•
Central composite design was employed to analyze and optimize the
process.
Abstract
In this study, Ca–Mg–Al hydrotalcite was deposited on the inert
honeycomb ceramic surface as a second carrier and KF was loaded on the
support as an active component. The KF/Ca–Mg–Al hydrotalcite/honeycomb
ceramic monolithic catalyst was packed in the membrane reactor for
biodiesel production from the transesterification between soybean oil
and methanol. The central composite design (CCD) of response surface
methodology (RSM) was employed to investigate the effects of reaction
temperature, catalyst amount and circulation velocity on the production
of biodiesel. A quadratic model was developed to navigate the design
space. The optimum condition for the highest biodiesel yield was
obtained by the assistance of the model. The catalyst showed a
reasonable efficiency and reusability for coupling the monolithic
catalyzed transesterification and membrane separation in the membrane
reactor.
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