The Encyclopedia Americana, Volume 7Grolier, 1989 - Encyclopedias and dictionaries |
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Page 144
COAL LIQUEFACTION - COAL TAR COAST GUARD. 144 UNDERGROUND GASIFICATION OF COAL The United States , Britain , and the Soviet Union have made tests to gasify coal under- ground to obtain a low - Btu gas . In this ap- proach , input- and ...
COAL LIQUEFACTION - COAL TAR COAST GUARD. 144 UNDERGROUND GASIFICATION OF COAL The United States , Britain , and the Soviet Union have made tests to gasify coal under- ground to obtain a low - Btu gas . In this ap- proach , input- and ...
Page 145
... coal tar pitches has in- creased tremendously in recent years because of the growing number of useful chemicals recov- ered and derived from them . However , the single most important use of coal tar pitch itself in the United States is ...
... coal tar pitches has in- creased tremendously in recent years because of the growing number of useful chemicals recov- ered and derived from them . However , the single most important use of coal tar pitch itself in the United States is ...
Page 213
... coal or petroleum or other liquid hydrocarbons are distilled in the absence of air . Coke made from coal and used as a fuel is by far the most impor- tant type of coke commercially . Pitch coke , which is made by distilling coal tar ...
... coal or petroleum or other liquid hydrocarbons are distilled in the absence of air . Coke made from coal and used as a fuel is by far the most impor- tant type of coke commercially . Pitch coke , which is made by distilling coal tar ...
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