Document Type: 
Document Number (FOIA) /ESDN (CREST): 
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Document Creation Date: 
December 27, 2016
Document Release Date: 
March 19, 2014
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Case Number: 
Publication Date: 
June 20, 1958
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PDF icon CIA-RDP80T00246A026800880001-8.pdf122.24 KB
Declassified in Part - Sanitized Copy Approved for Release 2014/03/19: CIA-RDP80T00246A026800880001-8 INFORMATION REPORT INFORMATION REPORT CENTRAL INTELLIGENCE AGENCY This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws, Title 18, U.S.C. Secs. 793 and 794, the transmission or revelation of which in any manner to an unauthorized person is prohibited by law. S-E-C-R-E-T 50X1 -HUM COUNTRY USSR REPORT SUBJECT Underground Gasification of Coal DATE DISTR. 20 June 1958 NO. PAGES 2 REFERENCES RD DATE OF INFO. PLACE & DATE ACQ. 50X1 -HUM SOURCE EVALUATIONS ARE DEFINITIVE. APPRAISAL OF CONTENT IS TENTATIVE. 50X1 -HUM Methods of Underground Gasification of Coal The methods used in the Soviet Union vary with brown coal and hard coal.-\ The brown coal systems were based on linking between vertical boreholes by medium pressure air, using reverse linkage. Electro-linkage, although still used, was proving uneconomical. The actual gasification process was carried out with low-pressure air and the gasification zone transferred to successive rows of boreholes. This sequence provided a pre-drying of the lignite. Hard coal was being gasified with oxygen-enriched air at the main station, Lisichansk 48-50, E 38-2.27. A, new deposit was being gasified with plain air. Linkage was established by drilling boreholes either from drifts) through outcropping seams,or by directionally drilled boreholes. High- pressure fracture by air or drilling mud was also carried out. Methods Under Study The method emphasized for brawn coal was the linkage between vertical boreholes by reverse combustion; in hard coal, change-direction boreholes received the most attention. Other methods were still under study but were diminishing in importance. Vortex patterns did not appear to be under study. Controls 4. Gasification was controlled by temperature, pressure, gas flow, and gas composition measurements with manual control on the outlet gas quantities where required. The latest system used a remote telemetering system with scanning, all parameters,being converted at the borehole outlets to electrical impulse. STATE ARMY NAVY S-E-G-R-E-T AIR FBI 50X1 -HUM AEC ORR/EV (Note: Washington distribution indicated by "X"; Field distribution by "*".) 1 INFORMATION REPORT INFORMATION REPORT . /I Declassified in Part - Sanitized Copy Approved for Release 2014/03/19: CIA-RDP80T00246A026800880001-8 Declassified in Part - Sanitized Copy Approved for Release 2014/03/19 : CIA-RDP80T00246A026800880001-8 S-E-C-R-E-T Point Utilization 5. The pioneer brown coal station.at Tula g.54-12) E 37.-3 transmitted gas for burning in local factories. The new brown coal stations at Shatsk,5.544)2, E 41-437 and Angren zi\T 4100) E 70-127 were being prepared for power generation at the site) the-planned output being 48 and 100 W?respectiveli. No other application on site was at present envisaged. Gas purification 6. The gas from brown coal was given a Cyclone treatment for sand removal whenever sand occurred infthe.overburden. The gas was subsequently washed, treated in electrostatic filters andwashed by the Thyloxprocese for sulphur removal,. The gas from hard coal was water washed and cooled but not treated for sulphur removal: Additives Research carried on with oxygen enrichment of the air-blast and addition of steam was directed mainly to the production of gas with a H2:N2 ratio of 3:1, evidently for ammonia synthesis. However, it was not regarded as of primary interest, the objective being the generation .of electricity at a cost less than that possible with mining by open- cast or conventional methods or hydraulic mining. No work had been done on enrichment of the gas itself. Priority was being given to the new natural gas lines from Saratov5 51-34; E 46-027 to Moscow. The low calorific value gas from underground gasification was not considered an economical proposition for transmission over more than five kilometers. S-F-P-R-R-T 50X1-HUM 50X1-HUM Declassified in Part - Sanitized Copy Approved for Release 2014/03/19: CIA-RDP80T00246A026800880001-8