Future Sources of Organic Raw Materials: CHEMRAWN I. by L. E. St-Pierre

By L. E. St-Pierre

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Occidental P e t r o l e u m is evaluating, u n d e r D O E s p o n s o r s h i p , in t w o commercial size c h a m b e r s the two best rubblizing t e c h n i q u e s developed over the last five to six years of research. T h e c h a m b e r s will be 40 m e t e r s square by 90 m e t e r s high. 5 M M . A b o u t 7 1 % of this cost is provided by D O E . Rio Blanco Oil Shale project has begun mining of their test c h a m b e r w h e r e they will test their modified in situ p r o c e s s . This p r o c e s s is similar to O x y ' s except that it employs a slightly different rubblizing technique and pressurizes the c h a m b e r so that the flame front a d v a n c e s faster.

The concept " f o r e s t " is defined by F A O . A distinction is m a d e between "closed f o r e s t " (or rather forest) and " o p e n w o o d l a n d " . Closed forest is defined as having a crown cover (the projection of the c r o w n s on the ground) of more than 19% and open woodland between 19 and 5%. T h u s the definition of closed forests is meant to identify the forests of possible interest for industrial forestry. About 22% of the world's total land area (13 billion hectares) is covered by closed forests and another 8% by open woodland.

T. A. , Denver, Colorado, 1975. 9. Science, Vol. 198, N o . 4321, December 9, 1977, pp. 1023-1027. 10. Η. E. McCarthy, et ai, AIChE Symposium Series, N o . 155, Vol. 72, 1976. Coal and the human need for energy C A R L E. C. 20036 Abstract—The world faces the problem of declining supplies of petroleum and natural gas, and must turn increasingly to its abundant supplies of coal, which make up 47% of the energy content of recoverable reserves of the globe's fossil fuels. Coal is widespread, with enormous deposits in the U .

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