Novel concept development of an internal recirculation catalyst for mild gasification: Progress report, September 1-November 30, 1987

Technical Report · Mon Feb 01 04:00:00 EST 1988

OSTI ID:7153349

Solka, B H; Feldkirchner, H L; Babu, S P

Although pure cesium hydroxide volatilizes rapidly in steam at temperatures suitable for mild gasification it also interacts with coal mineral matter under these conditions. This results in a lowering of the cesium hydroxide volatility to the point of its being rendered unsuitable for use as a recirculating catalyst. Alternative inorganic compounds were considered and a number were selected as worthy of further investigation. DOE's guidance was sought and zinc chloride was selected for testing under a no-cost time extension of this contract. Zinc chloride has a vapor pressure that varies from less than 0.053 to greater than 1.0 atmosphere in the 1000/degree/F to 1300/degree/F temperature range. This meets the volatility requirements for internal recirculation under mild gasification conditions. Seventeen pyrolysis-gas chromatography tests were conducted in helium. Four tests used Illinois No.6 coal to provide a baseline comparison with earlier work and the rest used North Dakota lignite. Cesium hydroxide catalyzed lignite was tested to complete observations of the CsOH behavior with coals of three different ranks. Zinc chloride catalyzed lignite was tested to study any effects that it may have on the mild gasification/devolatilization products. The results from CsOH-North Dakota lignite tests were similar to those previously observed with other coals. The effect of ZnC1/sub 2/ on North Dakota lignite devolatilization include an increase in overall conversion as reflected by a 10 weight percent decrease (relative) in char residue, an increased production of water and carbon dioxide, decreased production of hydrogen sulfide, and a shift in boiling point distribution of recovered condensable organics in the C/sub 6/ to C/sub 44/ boiling point range. 3 refs., 1 fig., 4 tabs.

• Research Organization: USDOE Morgantown Energy Technology Center, WV
• DOE Contract Number: AC21-86MC23057
• OSTI ID: 7153349
• Report Number(s): DOE/MC/23057-2607; ON: DE88014717
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALI METAL COMPOUNDS
CATALYSTS
CESIUM COMPOUNDS
CESIUM HYDROXIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
CIRCULATING SYSTEMS
COAL GASIFICATION
DECOMPOSITION
DEVOLATILIZATION
DOCUMENT TYPES
GAS CHROMATOGRAPHY
GASIFICATION
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
OXYGEN COMPOUNDS
PROGRESS REPORT
PYROLYSIS
PYROLYSIS PRODUCTS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDES