NH{sub 3}/H{sub 2}S advances
- Research Triangle Inst., Research Triangle Park, NC (United States)
- SRI International, Menlo Park, CA (United States)
- General Electric (United States)
The following preliminary conclusions can be derived from the above-mentioned experimental results: (1) HTSR-1, a nickel-based catalyst has a high activity for NH{sub 3} decomposition at 725{degree}C in simulated coal gas streams under low H{sub 2}S levels. (2) HTSR-1 when mixed with a desulfurization sorbent such as zinc titanate could decompose NH{sub 3} effectively until the removal of H{sub 2}S by zinc titanate decreases. (3) HTSR-1 continues to exhibit an activity for NH{sub 3} decomposition even after exposure to zinc titanate regeneration conditions. (4) MoS{sub 2} is also a catalyst for the decomposition of NH{sub 3}. However, its surface area needs to be maintained by addition of suitable stabilizing agents for sustained activity. Sorbent-catalyst samples of zinc titanate doped with cobalt-molybdenum were prepared by first crushing and sieving pellets of zinc titanate sorbents (L-3774M). The zinc titanate powders were then placed into an aqueous solution having the desired total amount of molybdenum (in the form of molybdic acid). The water was then dried and the powder heated and calcined. To add cobalt to the Mo-coated powder, the powder was then placed into a solution of cobalt nitrate containing the appropriate amount of the cobalt precursor followed by drying and calcination. The sorbent-catalyst samples were then activated (presulfided) by introducing H{sub 2}S in a controlled reducing environment. Samples of nickel-molybdenum-zinc titanate were prepared by using nickel nitrate instead of cobalt nitrate in the described procedure.
- Research Organization:
- Research Triangle Inst., Research Triangle Park, NC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC21-92MC29011
- OSTI ID:
- 10183375
- Report Number(s):
- DOE/MC/29011-93/C0198; CONF-9306148-8; ON: DE93019354
- Resource Relation:
- Conference: Coal-fired power systems `93: advances in IGCC and PFBC review meeting,Morgantown, WV (United States),28-30 Jun 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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