Sulfur poisoning of nickel methanation catalysts
Conference
·
· 71st AIChE Annu. Meet.; (United States)
OSTI ID:7101712
Sulfur poisoning of nickel methanation catalysts, i.e., alumina-supported nickel, nickel bimetallics with Co, Pt, Rh, Ru, and Ni/MoO/sub 3/, containing 3-20Vertical Bar3< by wt metal, was studied in 95Vertical Bar3< N/sub 2//4Vertical Bar3< H/sub 2//1Vertical Bar3< CO or 99Vertical Bar3< H/sub 2//1Vertical Bar3< CO mixtures containing 10 ppm H/sub 2/S. Exposure to H/sub 2/S for 24 hr caused 99Vertical Bar3< deactivation for 3Vertical Bar3< metal samples but only 50-60Vertical Bar3< loss of activity for 15-20Vertical Bar3< metal catalyst powder and 8-12Vertical Bar3< metal monolithic catalysts. None of the bimetallics showed substantially greater resistance to H/sub 2/S poisoning than nickel, but Ni/MoO/sub 3/ was more active before, during, and after exposure to H/sub 2/S. All the catalysts deactivated more rapidly in the hydrogen-rich reactant mixture, but the deactivation rate was still less than that predicted by equilibrium H/sub 2/S adsorption. The somewhat higher sulfur tolerance of monolithic catalysts is probably an effect of egg-shell or pore-mouth poisoning. Exposure of poisoned catalyst powders to pure H/sub 2/ at 675/sup 0/K irreversibly inactivated them, but successive treatment with CO and O/sub 2/ at 525/sup 0/K partly recovered the activity of Ni-Co.
- Research Organization:
- Brigham Young Univ.
- OSTI ID:
- 7101712
- Report Number(s):
- CONF-781110-
- Conference Information:
- Journal Name: 71st AIChE Annu. Meet.; (United States) Journal Volume: 48d
- Country of Publication:
- United States
- Language:
- English
Similar Records
Monolithic-supported nickel catalysts--1. Methanation activity relative to pellet catalysts
Sulfur poisoning of nickel methanation catalysts, part 1: in situ deactivation by H/sub 2/S of nickel and nickel bimetallics
Sulfur poisoning of nickel methanation catalysts. I. In situ deactivation by H/sub 2/S of nickel and nickel bimetallics
Conference
·
Sun Dec 31 23:00:00 EST 1978
· 86th AIChE Natl. Meet. Prepr.; (United States)
·
OSTI ID:6645364
Sulfur poisoning of nickel methanation catalysts, part 1: in situ deactivation by H/sub 2/S of nickel and nickel bimetallics
Journal Article
·
Sun Dec 31 23:00:00 EST 1978
· J. Catal.; (United States)
·
OSTI ID:5205172
Sulfur poisoning of nickel methanation catalysts. I. In situ deactivation by H/sub 2/S of nickel and nickel bimetallics
Journal Article
·
Wed Oct 31 23:00:00 EST 1979
· J. Catal.; (United States)
·
OSTI ID:5561886
Related Subjects
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEACTIVATION
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METALS
METHANATION
NICKEL
POISONING
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENTS
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEACTIVATION
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METALS
METHANATION
NICKEL
POISONING
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENTS