Bench-scale development of catalysts for reforming aromatic and heterocyclic hydrocarbons. Final report, February 1980-February 1982

Technical Report · Thu Apr 01 00:00:00 EST 1982

OSTI ID:5416296

Stern, E W

This program was directed toward development of catalysts for the upgrading of unconverted pyrolysis products and volatiles formed in coal gasification to synthesis gas. Work performed consisted of catalyst preparation, characterization of fresh and spent catalysts, catalyst screening, and aging studies under increasingly severe conditions. Included in characterization of fresh catalysts were determinations of hydrothermal stability and studies of resistance to coking and sulfiding. Results of work in this program are reported. Findings support the conclusion that sulfur poisoning is the major cause of catalyst deactivation. Nickel and ruthenium catalysts were found to deactivate rapidly at inlet sulfur concentrations as low as 2 vppM. In contrast, excellent stability was displayed by platinum and rhodium catalysts at inlet sulfur levels greater than or equal to 40 ppM and 150 to 200 ppM, respectively. Support and metal sintering can be managed by the proper selection of materials and preparative variables. Coking appears to be a secondary problem but may become troublesome if sufficiently high catalyst activity is not maintained. Sulfur tolerant platinum group catalysts appear capable of tolerating relatively high coke levels. There seem to be no inherent problems in steam reforming gasifier tar providing catalyst sulfur tolerance limits are not exceeded and mechanical problems in delivery of such materials are overcome. While to date, activities comparable to those of fresh nickel catalysts have been obtained in platinum group metal catalysts only at relatively high metal loadings, there are indications that metal loadings can be minimized by preparative optimization.

• Research Organization: Parsons (Ralph M.) Co., Pasadena, CA (USA); Engelhard Corp., Edison, NJ (USA). Engelhard Industries Div.
• DOE Contract Number: AC21-78ET11029
• OSTI ID: 5416296
• Report Number(s): DOE/ET/11029-1191; ON: DE82015422
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
CHEMICAL PREPARATION
DEACTIVATION
TESTING
COAL GASIFICATION
NICKEL
CATALYTIC EFFECTS
PLATINUM
RHODIUM
RUTHENIUM
COKING
COMPARATIVE EVALUATIONS
RESEARCH PROGRAMS
STABILITY
SULFUR
CARBONIZATION
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
GASIFICATION
METALS
NONMETALS
PLATINUM METALS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
010404* - Coal
Lignite
& Peat- Gasification
400201 - Chemical & Physicochemical Properties