title: A General Silica-Templating Synthesis of Alkaline Mesoporous Carbon Catalysts for Highly Efficient H2S Oxidation at Room Temperature.
abstract: A general synthesis of alkaline mesoporous carbons (AMCs) is developed based on a simplified silica-templating method for room-temperature catalytic oxidation of H2S. The key to the success relies on dissolving the silica templates to create the interconnected mesoporous structure as well as leaving parts of the alkaline products in the pores; both of them are prerequisites for H2S oxidation. By adjusting the alkaline etching degree and organic/inorganic ratio, the porosity and basicity of the AMC could be simultaneously tuned, allowing the AMCs direct use for H2S catalytic oxidation with an unprecedented removal capacities of 4.49 ± 0.12 g/g. Such excellent catalytic performance should be attributed to the developed pore structure that stores the product sulfur and the strong basicity that promotes the dissociation of H2S into HS-ions. Moreover, this simplified silica-templating method could be easily extended to the preparation of various silica templated mesoporous carbon catalysts. All these AMCs demonstrate a successful combination of low cost with high performance, which may well be the answer for the technical development of industrial H2S removal.
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Zixiao
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Wuyou
authors.initials: W
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Donghui
authors.identifier: http://orcid.org/0000-0002-3179-4822
authors.initials: D
authors.lastname: Long
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Jitong
authors.initials: J
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Wenming
authors.initials: W
authors.lastname: Qiao
authors.affiliation: State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Licheng
authors.initials: L
authors.lastname: Ling
keywords: H2S removal; NaOH etching; catalytic oxidation; mesoporous carbon; silica template