eprintid: 3569
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/35/69
datestamp: 2023-11-09 15:51:49
lastmod: 2023-11-09 15:51:49
status_changed: 2023-11-09 15:47:07
type: article
metadata_visibility: show
creators_name: Vo, D.-V.N.
creators_name: Arcotumapathy, V.
creators_name: Abdullah, B.
creators_name: Adesina, A.A.
title: Evaluation of Ba-promoted Mo carbide catalyst for Fischer-Tropsch synthesis
ispublished: pub
keywords: Ba-promotion; Catalyst surfaces; Consumption rates; Molybdenum carbide; Product distributions; Production rates; Promoted catalysts; Temperature-programmed carburization, Activation energy; Carbides; Carbon; Carbon dioxide; Catalyst deactivation; Catalyst selectivity; Fischer-Tropsch synthesis; Methane, Catalyst activity, barium; cobalt; molybdenum, article; Fischer Tropsch synthesis; physical chemistry; polymerization
note: cited By 8
abstract: Background: Traditional FT catalysts such as Co and Fe still suffer from carbon-induced deactivation even with alkali promotion. The objective of this study was to examine the effect of Ba addition to carbon-tolerant Mo carbide since it has Pt-like characteristics and is cheaper than noble metals as an FT catalyst. Results: The presence of Ba increased the Mo carbide production rate and reduced the activation energy for its formation. The promoted catalyst exhibited higher specific basic site strength and CO2 uptake for strong basic site than that of the undoped catalyst. Both catalysts exhibited optimal reaction rate at a H2 mole fraction of 0.75 while CO consumption rate, total olefin-to-paraffin ratio, methane suppression as well as C5+ selectivity were improved with Ba addition. The non-standard Anderson-Schulz-Flory (ASF) product distribution observed for the Ba-doped catalyst may be due to the appearance of an additional polymerization site on the catalyst surface located in the BaMoO4 phase. Chain growth factor was enhanced by up to 93 from 0.43 to 0.83 with the Ba-doped catalyst. Conclusions: Ba promoter increased chain growth probability by about 93. The deviation of product distribution from standard ASF plots with 2 chain growth factors for the 3wtBa-10MoC1-x/Al2O3 catalyst was probably due to the presence of different active sites for chain initiation. The result is unprecedented and represents excellent opportunity for industrial exploitation of a new and relatively cheap carbon-resistant catalyst. © 2012 Society of Chemical Industry.
date: 2013
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879212157&doi=10.1002%2fjctb.3984&partnerID=40&md5=b0dae837d62446cb19e174db7d4d20ae
id_number: 10.1002/jctb.3984
full_text_status: none
publication: Journal of Chemical Technology and Biotechnology
volume: 88
number: 7
pagerange: 1358-1363
refereed: TRUE
issn: 02682575
citation:   Vo, D.-V.N. and Arcotumapathy, V. and Abdullah, B. and Adesina, A.A.  (2013) Evaluation of Ba-promoted Mo carbide catalyst for Fischer-Tropsch synthesis.  Journal of Chemical Technology and Biotechnology, 88 (7).  pp. 1358-1363.  ISSN 02682575