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By Clarence Karr (Eds.)

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Extra info for Analytical Methods for Coal and Coal Products. Volume II

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Therefore the consequences of the natural processes of m e t a m o r p h i s m b y w h i c h t h e r a n k o f a coal is i n c r e a s e d w i l l a l w a y s b e a t o p i c of i n t e r e s t a m o n g r e s e a r c h w o r k e r s . T h e v a r i o u s m a j o r coal b a s i n s are o f different g e o l o g i c a l a g e s , so that different k i n d s o f p l a n t m a t e r i a l s e r v e d as i n p u t to coal f o r m a t i o n . M o r e o v e r , typical t e m p e r a t u r e t i m e - p r e s s u r e h i s t o r i e s differ i n t h e different c o a l b a s i n s b e c a u s e o f differing rates o f v a r i o u s g e o l o g i c a l p r o c e s s e s o f s u b s i d e n c e a n d uplift.

T h i r d , inorganic oxygen m a y b e approximated "for well-known seams of l o w mineral mat- 30 P. H. Given and Richard F. Yarzab t e r " b y a s s u m i n g it e q u a l to o n e - h a l f t h e m i n e r a l m a t t e r c o n t e n t . C o m p a r a t i v e a n a l y s e s for o r g a n i c o x y g e n are s h o w n for six c o a l s . H e r e a g a i n is a n a p p r o a c h t h a t c a n b e s u c c e s s f u l , b u t at a h e a v y c o s t i n t i m e a n d effort. T w o g r o u p s of w o r k e r s h a v e e x p l o r e d the u s e o f fast n e u t r o n a c t i v a t i o n for the d e t e r m i n a t i o n o f o x y g e n a n d n i t r o g e n i n c o a l s .

H e n c e o n e s h o u l d c o m p a r e , n o t p e r c e n t a g e c o n t e n t s , b u t m a s s e s , as s h o w n i n T a b l e V, w h e r e t h e figures c o r r e s p o n d to t h e d m m f a n a l y s e s j u s t d i s p l a y e d a n d to m i n e r a l m a t t e r c o n t e n t s o f 1 2 . 0 0 % i n r a w coal a n d 8 . 2 6 % i n product. 013 " F o r n o r m a l d m m f a n a l y s e s , see t e x t . 2 20. Coal Analysis and Mineral Matter 37 u c t ) . O n e w o u l d also e x p e c t s o m e i o n s to b e l e a c h e d f r o m t h e clay m i n e r a l s a n d a n y h e m a t i t e r e m o v e d , h e n c e t h e loss i n w e i g h t o f " o t h e r m i n e r a l m a t t e r .

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