title: XAFS study on the sulfidation mechanisms of Co-Mo catalysts supported on activated carbon and alumina: effect of complexing agent.
abstract: The effect of nitrilotriacetic acid (NTA) as a complexing agent on the sulfidation mechanisms of Co-Mo catalysts supported on activated carbon and alumina was examined by the XAFS technique. The XAFS results revealed that NTA interacted with Co atoms and formed the Co-NTA interaction, while it showed almost no influence on the local structures around Mo atoms. The Co-NTA interaction suppressed the aggregation of cobalt atoms and the interaction between cobalt and alumina during sulfiding, and consequently promoted the formation of the Co-Mo-S phase.
authors.affiliation: Cosmo Research Institute, Saitama, Japan. koji_tsuji@cosmo-oil.co.jp
authors.forename: K
authors.initials: K
authors.lastname: Tsuji
authors.forename: T
authors.initials: T
authors.lastname: Umeki
authors.forename: Y
authors.initials: Y
authors.lastname: Yokoyama
authors.forename: T
authors.initials: T
authors.lastname: Kitada
authors.forename: Y
authors.initials: Y
authors.lastname: Iwanami
authors.forename: O
authors.initials: O
authors.lastname: Nonaka
authors.forename: H
authors.initials: H
authors.lastname: Shimada
authors.forename: N
authors.initials: N
authors.lastname: Matsubayashi
authors.forename: A
authors.initials: A
authors.lastname: Nishijima
authors.forename: M
authors.initials: M
authors.lastname: Nomura