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8687911 
Journal Article 
Gasification of Lignite by BCR Two-Stage Super-Pressure Process 
Grace, RJ; Glenn, RA; Zahradnik, RL 
1972 
0 
Industrial and Engineering Chemistry Product Research and Development
ISSN: 0196-4305 
11 
1 
95-102 
English 
Optimization results are reported for the second stage of the BCR two-stage super-pressure gasifier by operation of a 100 Ib/hr process and equipment development unit (PEDU) with lignite at 1 000 psi and exit temperatures from 1 400-1 600°F. Hot synthesis gas is generated internally by reacting benzene or cyclohexane, oxygen, and steam in a simulated first stage which entrains and gasifies a pulverized coal feed as it passes downward through an 8-in. diameter, 5-ft long second stage. Second stage conditions closely approximate those expected in full-scale gasifier operation. Direct yields of methane range from 11-18% of the carbon in the lignite feed, depending upon the partial pressure of hydrogen in the Stage 1 gas. Overall carbon conversions are 35-55%. The unconverted carbon is completely gasified in Stage 1 to generate both the heat and synthesis gas required for Stage 2. 1972, American Chemical Society. All rights reserved.