Synthesis of high-Btu gas in a Raney-nickel-coated tube-wall reactor
Technical Report
·
OSTI ID:6477082
A tube-wall reactor with a Raney nickel catalyst deposited on the outer wall of the tube by flame spraying is effective in the practically complete conversion of 3H/sub 2/ + 1CO synthesis gas to a high-Btu gas (methane) at an hourly space velocity of 7,000 volumes of gas (NTP) per hour per volume of annular volume. Partially reacted synthesis gas containing an appreciable amount of methane can also be treated in this reactor to increase the heating value to over 900 Btu/cubic ft. Excellent heat removal through the metal wall to a coolant and temperature control were obtained. The heat transfer coefficient from the catalyst to the coolant was about 275 Btu/h per square ft//sup 0/F. Synthesis tests were conducted with tubes 1.2 in. in OD by 6 in. long, and 1.3 in. in OD by 36 in. long. When operating at a synthesis gas rate of 100 to 120 scfh/ft/sup 2/ of catalyst-coated tube, catalyst life was long enough to realize a catalyst coat for the raw Raney Ni alloy of about 0.3 cent per 1,000 cubic ft of pipeline gas (900 to 950 Btu/scf). Gas recycling at ratios of 1:1 to 3:1 was effective in increasing conversion and in extending the life of the catalyst to about 16 weeks. In cost and in operating characteristics the tube-wall reactor compares favorably with the fluidized-bed and hot-gas-recycle reactor systems for the synthesis of high-Btu gas from H/sub 2/ + CO. 9 figures.
- Research Organization:
- Bureau of Mines, Washington, DC (USA)
- OSTI ID:
- 6477082
- Report Number(s):
- BM-RI-7033
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
DESIGN
ELEMENTS
ENERGY SOURCES
ENERGY TRANSFER
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT TRANSFER
HIGH BTU GAS
METALS
METHANATION
NICKEL
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SERVICE LIFE
SYNTHESIS
TRANSITION ELEMENTS
10 SYNTHETIC FUELS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
DESIGN
ELEMENTS
ENERGY SOURCES
ENERGY TRANSFER
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT TRANSFER
HIGH BTU GAS
METALS
METHANATION
NICKEL
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SERVICE LIFE
SYNTHESIS
TRANSITION ELEMENTS