Pre-methanation purification study: removal of low concentration gaseous sulfur compounds (catalyst poisons)
Before catalytic methanation can be used for the commercial production of synthetic natural gas from synthesis gas, the problem of methanation catalyst deactivation must be solved. The nickel catalyst used is easily poisoned by sulfur compounds. It was the purpose of this program to identify and develop a viable and effective pre-methanation purification system to protect the methanation catalyst and therby promote viable coal gasification by the SYNTHANE process. A review and analysis was made of state of the art gaseous sulfur compound removal processes. On the basis of this extensive review, a system was selected for a detailed laboratory evaluation to obtain needed design data. A copper-chromium oxide impregnated activated carbon was selected as the test sorbent and evaluated for its ability to remove specified levels of H/sub 2/S, COS, CS/sub 2/ mercaptans and thiophenes. The levels used of these respective sulfur compounds was dictated by the anticipated performance of the Benfield Hot Potassium Carbonate Process selected for bulk removal of acid gases in the Synthane Process. Experimental runs were made using single component and multicomponent sulfur compound gaseous mixtures in a simulated synthesis gas. Adsorption breakthrough curves were evaluated and estimates were made of the time for breakthrough to occur, and the approximate maximum values of volume of gas that could be processed/volume of carbon used. Using this data, estimates of sorbent requirements, costs, and environmental handling constraints were made for a system to be used in the 72 TPD SYNTHANE pilot plant.
- Research Organization:
- Exxon Research and Engineering Co., Linden, NJ (USA). Government Research Lab.
- DOE Contract Number:
- EY-76-C-02-0059
- OSTI ID:
- 5724745
- Report Number(s):
- COO-0059-T1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coal-gasification support studies. Volume III, Task 3. Studies to improve the processing techniques of product and waste streams in coal-gasification processes. Final report, November 19, 1981-August 15, 1982
DEVELOPMENT OF IMPROVED CATALYSTS FOR THE SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES WITH HYDROCARBONS
Related Subjects
ACTIVATED CARBON
SORPTIVE PROPERTIES
CATALYSTS
POISONING
SULFUR COMPOUNDS
REMOVAL
SYNTHANE PROCESS
SYNTHESIS GAS
PURIFICATION
ADSORPTION
BENFIELD PROCESS
CARBON OXYSULFIDE
CARBON SULFIDES
COAL GASIFICATION
HYDROGEN SULFIDES
METHANATION
PILOT PLANTS
THIOLS
THIOPHENE
ADSORBENTS
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
FUNCTIONAL MODELS
GASES
GASIFICATION
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SORPTION
SULFIDES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
010402* - Coal
Lignite
& Peat- Purification & Upgrading
010404 - Coal
Lignite
& Peat- Gasification