Kinetics of Mn-based sorbents for hot coal gas desulfurization. Quarterly progress report, July 15, 1995--September 15, 1995 Page: 4 of 17
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Currently, many proposed IGCC processes include a water quench prior to
desulfurization. This is for two reasons; limitations in the process hardware (1000 C), and
excessive Zn-based sorbent loss (about 700 C). With manganese the water quench is
obviated due to sorbent loss, as Mn-based sorbents have been shown to retain reactivity
under cycling testing at 900 C7,8. This reduces system hardware, and increases thermal
efficiency while decreasing the equilibrium H2S over-pressure obtainable with a manganese
2. METHODS AND MATERIALS
In this report, formulation variables considered in preparing manganese-based
- MnO to substrate stoichiometric ratio (2:1 to 6:1).
. Manganese grade; a reagent MnCO3 and an ore MnO2.
* Substrate; alundum and titanate.
- Binder; weight percent bentonite (0-5%).
- Induration temperature (>1100 *C).
Feedstocks are listed below for materials not previously reported: Mn ore and titanate
(rutile). The compositions of manganese carbonate, alundum, bentonite, dextrin, and
activated carbon are in the previous two quarterly reports. Assays for the manganese ore
and titanate are given below.
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Hepworth, M.T. Kinetics of Mn-based sorbents for hot coal gas desulfurization. Quarterly progress report, July 15, 1995--September 15, 1995, report, September 15, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc672942/m1/4/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.