首页|Understanding the catalytic performance and deactivation behaviour of second-promoter doped Pt/WOx/γ-Al2O3 catalysts in the glycerol hydrogenolysis for selective and cleaner production of 1,3-propanediol
Understanding the catalytic performance and deactivation behaviour of second-promoter doped Pt/WOx/γ-Al2O3 catalysts in the glycerol hydrogenolysis for selective and cleaner production of 1,3-propanediol
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
The selective aqueous-phase glycerol hydrogenolysis is a promising reaction to produce commercially useful 1,3-propanediol(1,3-PDO).The Pt-WOx bifunctional catalyst can catalyse the glycerol hydrogenol-ysis but the catalyst deactivation via sintering,metal leaching,and coking can predominantly occur in the aqueous phase reaction.In this work,the effect of reaction temperature,pressure and second promoter(Cu,Fe,Rh,Mn,Re,Ru,Ir,Sn,B,and P)on catalytic performance and deactivation behaviour of Pt/WOx/γ-Al2O3 was investigated.When doped with Rh,Mn,Re,Ru,Ir,B,and P,the second promoter boosts cat-alytic activity by promoting great dispersion of Pt on support and increasing Pt surface area.The increased Brønsted acid sites lead to selective synthesis of 1,3-PDO than 1,2-propanediol(1,2-PDO).The characterization studies of fresh and spent catalysts reveal that the main cause of catalyst deactiva-tion is the Pt sintering,as interpreted based on XRD,CO chemisorption,and TEM analyses.The Pt sinter-ing is affected depending on the second promoter that can either or reduce the interaction between Pt,WOx,and Al2O3.As an electron acceptor of Pt in Pt/WOx/γ-Al2O3,Re and Mn as second promoters resulted in increased Pt2+on the catalytic surface,which strengthens the contact between Pt and γ-Al2O3 and WOx,resulting in a decrease in Pt sintering.The metal leaching and coking are not affected by the presence of second promoter.The catalyst modified with a second promoter possesses improved catalytic activity and 1,3-PDO production,however the stability continues to remain a challenge.The present work unrav-elled the determining parameters of catalytic activity and deactivation,thus providing a promising pro-tocol toward effective catalysts for glycerol hydrogenolysis.
Rafik Rajjak Shaikh、Sittichai Damruang、Rais Ahmad Khan、Supareak Praserthdam、Piyasan Praserthdam
展开 >
Center of Excellence on Catalysis and Catalytic Reaction Engineering(CECC),Department of Chemical Engineering,Faculty of Engineering,Chulalongkorn University,Bangkok 10330,Thailand
Department of Chemistry,College of Science,King Saud University,P.O.Box 2455,Riyadh 11451,Saudi Arabia
High-Performance Computing Unit(CECC-HCU),Centre of Excellence on Catalysis and Catalytic Reaction Engineering(CECC),Department of Chemical Engineering,Faculty of Engineering,Chulalongkorn University,Bangkok 10330,Thailand
National Research Council of Thailand(NRCT)Second Century FoundationChulalongkorn UniversityResearcher Supporting Project,King Saud University,Saudi Arabia
NETL
NSTL
万方数据
