Preparation and catalytic performance of a novel organometallic CoH/Hβ catalyst for n-hexane isomerization. (4th September 2020)

• Record Type: Journal Article
• Authors: Zhang, Mei; Wang, Congcong; Zhang, Chao; Cai, Tingting; Zhu, Lijun; Xia, Daohong
• Is Part Of: New journal of chemistry. Volume 44:Number 36(2020)
• Page Start: 15646
• Page End: 15653
• Publication Date: 2020-09-04
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj01437k
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A novel organometallic catalyst CoH/Hβ was synthesized and directly provided hydrogenation/dehydrogenation effects in the isomerization of n -hexane. Abstract : As a novel alkane isomerization catalyst, namely CoH/Hβ, was prepared by the reduction of CoH(P(OPh)3 )4, which was pre-impregnated on Hβ as support. The as-prepared CoH/Hβ catalyst was structurally compared with CoH(P(OPh)3 )4, CoH(P(OPh)3 )4 /Hβ via FT-IR, TPR, SEM, XRD and other techniques. The results show that the new organometallic hydride catalyst was synthesized successfully and exhibited excellent catalytic performance for the isomerization of n -hexane. For the best performance of the CoH/Hβ catalyst, the optimal catalytic reaction temperature, pressure, space velocity, and hydrogen/oil molar ratio were 300 °C, 2.0 MPa, 1.0 h −1, and 4.0, respectively, in the isomerization process of n -hexane. Under the optimal reaction conditions, the conversion of n -hexane, the yield of isomerization, and the selectivity towards iso-paraffins were 80.2%, 63.0%, and 78.6%, respectively. This performance is mainly attributed to the new structure of Co–H hydride in the CoH/Hβ catalyst, which has strong hydrogenation/dehydrogenation activity in the isomerization of n -hexane.