Actions for Catalytic coal gasification : an emerging technology for SNG

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Catalytic coal gasification : an emerging technology for SNG

Author
Lessard, R. R.
Published
United States : [publisher not identified], 1981
Springfield, Va.: National Technical Information Service, [approximately 1981]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Reitz, R. A.

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Summary
It has long been known that salts of alkali metals catalyze the gasification of coal. In 1971, Exxon Research and Engineering Company discovered that potassium salts added to coal also promote the methanation of coal gasification products. This discovery led to Exxon's Catalytic Coal Gasification (CCG) process. In the CCG process, coal with added potassium salts is gasified in a fluid bed at about 1300/sup 0/F and 500 psia. Since lower temperatures and higher pressure favor methane formation, the gasification reactor has a high methane yield. By separating and recycling unconverted CO and H/sub 2/ back to the reactor, a single reaction step process is obtained. An advantage of CCG is that the heat release from methanation is in the gasifier where it provides essentially all of the heat needed for gasification. This eliminates the need for oxygen or other complex gasifier heat input methods. Thermal efficiency of CCG ranges from 60 to 70% depending on coal feed properties. Process development work has been carried out in bench scale equipment and pilot plants. The 1 ton/day unit has operated for over 8000 hours since its completion in 1978. The next major phase of the CCG development program is the construction and operation of a 100 ton/day pilot plant. This unit is to be built in Holland with the objective of bringing the process to commercial readiness. The size has been carefully selected to allow direct scale-up from the 100 ton/day pilot plant to commercial sized plants.
Report Numbers
DE82007596; DOE/ET/13005-T13
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC01-78ET13005
OSTI Identifier 5386919
Research organization: Exxon Research and Engineering Co., Baytown, TX (USA). Baytown Research and Development Div.
View MARC record | catkey: 47327702