Design of a Hierarchical Meso/Macroporous Zeolite‐Supported Cobalt Catalyst for the Enhanced Direct Synthesis of Isoparaffins from Syngas. Issue 4 (30th January 2015)

• Record Type: Journal Article
• Authors: Lin, Qihang; Yang, Guohui; Chen, Qingjun; Fan, Ronggang; Yoneyama, Yoshiharu; Wan, Huilin; Tsubaki, Noritatsu
• Is Part Of: ChemCatChem. Volume 7:Issue 4(2015:Feb.)
• Page Start: 682
• Page End: 689
• Publication Date: 2015-01-30
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201402929
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A hierarchical meso/macroporous zeolite‐supported Co catalyst (Co/ASB) was designed and employed for the direct synthesis of isoparaffins. The hierarchical porous zeolite (ASB) was developed by a steam‐assisted crystallization method using alumina‐modified meso/macroporous silica as the precursor. Structural characterization indicated that the as‐synthesized ASB exhibited nanosized β‐zeolite crystallites and a hierarchical meso/macroporous structure. The activity of the Co/ASB catalyst was much higher than that of conventional Co catalysts supported on SiO₂ (Co/SiO₂) and H‐β‐zeolite (Co/B). A high isoparaffins selectivity of 30.5 % was obtained from Co/ASB because of the hydrocracking/isomerization of long‐chain hydrocarbons at the strong acidic sites of the β‐zeolite. Furthermore, as a result of the fast diffusion of syngas in the unique hierarchical pores, the methane selectivity of Co/ASB was lower than that of Co/B.</p> </abstract>