eprintid: 14556
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/45/56
datestamp: 2023-11-10 03:29:08
lastmod: 2023-11-10 03:29:08
status_changed: 2023-11-10 01:57:13
type: article
metadata_visibility: show
creators_name: Chong, C.C.
creators_name: Cheng, Y.W.
creators_name: Bukhari, S.N.
creators_name: Setiabudi, H.D.
creators_name: Jalil, A.A.
title: Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15)
ispublished: pub
keywords: Catalyst activity; Decomposition; Impregnation; Mass transfer; Methane; Microemulsions; Molecular sieves; Morphology; Nickel oxide; Silica, Metal-support interactions; Methane dry reforming; Microemulsion technique; Molecular sieve materials; Optimal temperature; Reactant conversion; Support morphology; Surface attributes, Nickel
note: cited By 25
abstract: Santa Barbara Amorphous-15 (SBA-15) is a promising molecular sieve material with its highly uniform porosity; nonetheless, its tubular pore channels discouraged mass transfer of reactants during catalysis. Herein, SBA-15 was altered by microemulsion technique to prepare two fibrous SBA-15 with distinct morphologies, viz. rod-liked F-SBA-15 and dendritic DFSBA-15. After Ni impregnation, the Ni/fibrous SBA-15 catalysts (Ni/F-SBA-15 and Ni/DFSBA-15) were catalytically evaluated with methane dry reforming (MDR). From characterization, rod-shaped F-SBA-15 had outer fibrous layer whereas dendritic DFSBA-15 consisted of a solid core with radially projected fibres. Besides, Ni/F-SBA-15 possessed uneven sized NiO but Ni/DFSBA-15 had uniform NiO dispersion. Characterization also proved that fibrillation and Ni impregnation did not alter the pristine properties of SBA-15. However, the surface attributes of SBA-15 remarkably reduced after fibrillation and Ni impregnation. The strength of metal-support (Ni-SiO2) interaction could be ranked as: Ni/DFSBA-15 > Ni/F-SBA-15 > Ni/SBA-15 (previously reported). Both Ni/fibrous SBA-15 catalysts exhibited high proportion of moderate basicity, which favoured the carbon removal via reverse Boudouard reaction. In accordance with endothermicity, the optimal temperature of MDR over both catalysts was 800 °C as greater temperature provoked conspicuous CH4 thermal decomposition. For 50 h MDR at 800 °C, both catalysts presented superior catalytic activity and stability. With a fully accessible siliceous framework, Ni/DFSBA-15 attained greater reactant conversions (84.05�87.40 XCH4 and 81.80�85.60 XCO2) than Ni/F-SBA-15 (80.30�85.80 XCH4 and 76.73�84.10 XCO2). In overall, Ni/DFSBA-15 was more coke-resistant than Ni/F-SBA-15 by virtue of its fully accessible structure, uniformly dispersed Ni phase, and stronger metal-support interaction. © 2020 Elsevier B.V.
date: 2021
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089152257&doi=10.1016%2fj.cattod.2020.06.073&partnerID=40&md5=20776a56aa48938a1a19e54d6b6857ab
id_number: 10.1016/j.cattod.2020.06.073
full_text_status: none
publication: Catalysis Today
volume: 375
pagerange: 245-257
refereed: TRUE
issn: 09205861
citation:   Chong, C.C. and Cheng, Y.W. and Bukhari, S.N. and Setiabudi, H.D. and Jalil, A.A.  (2021) Methane dry reforming over Ni/fibrous SBA-15 catalysts: Effects of support morphology (rod-liked F-SBA-15 and dendritic DFSBA-15).  Catalysis Today, 375.  pp. 245-257.  ISSN 09205861