Experimental and theoretical investigation of factors affecting the direct limestone-H[sub 2]S reaction

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00030a003· OSTI ID:7078890

Krishnan, S V; Sotirchos, S V ^[1]

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1. Univ. of Rochester, NY (United States). Dept. of Chemical Engineering

The factors influencing the behavior of the CaCO[sub 3]-H[sub 2]S reaction were investigated. Three types of limestones, all having high CaCO[sub 3] content (>95 % on a mass basis) but differing in petrographic structure, were reacted with H[sub 2]S in a thermogravimetric analysis system under noncalcining conditions, that is, in the presence of enough CO[sub 2] to prevent decomposition of CaCO[sub 3]. Experiments were carried out over a range of particle size, temperature, and H[sub 2]S concentration. Pore structure characterization suggested that the particle size decreased during the reaction. The data were analyzed using a shrinking core model, and the effective diffusivity through the product layer was found to vary significantly among the three solids. The obtained results were compared with reactivity data reported for the same stones for the CaCO[sub 3]-SO[sub 2], CaO-SO[sub 2], and CaO-H[sub 2]S reactions in past studies.

• OSTI ID: 7078890
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 33:6; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

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