Coking of Catalysts in Catalytic Glycerol Dehydration to Acrolein?
Ind. Eng. Chem. Res.,?2018,?57?(32), pp 10736–10753
??Research Group for Advanced Materials and Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Institute of Industrial Catalysis, College of Chemical Engineering,?
Zhejiang University of Technology,? Hangzhou? 310032,?China
??Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province,?China National Bamboo Research Center,?
Hangzhou? 310012,?People’s Republic of China
§?Centre for Future Materials,?University of Southern Queensland,?
Toowoomba,? Queensland? 4350,?Australia
∥?Department of Chemical Sciences,?University of Naples “Federico II”,?Via Cintia 21, Complesso Monte S. Angelo,?
Publication Date (Web): July 17, 2018
Catalytic glycerol dehydration provides a sustainable route to produce acrolein because glycerol is a bioavailable platform chemical. However, in this process catalysts are rapidly deactivated due to coking. This paper examines and discusses recent insights into coking of catalysts during catalytic glycerol dehydration. The nature and location of coke and the rate of coking depend on feedstock, operating conditions, and the acidity and pore structure of the solid catalysts. Several methods have been suggested for inhibiting the coking and slowing the deactivation of catalyst, including (1) cofeeding of oxygen, (2) tuning of the pore size of the solid acid catalysts, (3) doping noble metals (Ru, Pt, Pd) into the solid acid catalysts, and (4) designing new reactors. The present methods for inhibiting coking are still unsatisfactory. The deactivated catalysts can be regenerated by removing coke. Nevertheless, the rapid deactivation of the regenerated catalyst remains problematic. The literature survey indicates that the exact chemical compositions of the coke on the catalyst during glycerol dehydration remain elusive. The thermodynamics, kinetics, and mechanism of coking need to be probed so as to advance the development of a catalyst with high activity, selectivity, and resistance to coking to put the catalytic glycerol dehydration into practice.