Download e-book for kindle: Analytical Methods for Coal and Coal Products. Volume II by Clarence Karr (Eds.)

By Clarence Karr (Eds.)

ISBN-10: 0123999022

ISBN-13: 9780123999023

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

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OPTIMUM AND APPROXIMATE PROCEDURES FOR COMPUTING dmmf ANALYSES A. Ultimate Analyses To r e c a p i t u l a t e , w e h a v e s e e n t h a t d e r i v a t i o n o f a d m m f or d r y , m i n e r a l - c o n t a i n i n g a n a l y s i s , all f e a s i b l e c o r r e c t i o n s b e i n g m a d e , r e q u i r e s t h a t t h e f o l l o w i n g d a t a b e a v a i l a b l e : C , H , N , C I , f o r m s of sulfur, sulfate i n a s h , m i n e r a l m a t t e r , a n d C 0 2 f r o m c a r b o n a t e s .

9 ) . A statistical c o m p a r i s o n of t h e m i n e r a l m a t t e r c o n t e n t s o f 2 7 4 c o a l s calculate^! b y m e a n s o f t h e f o r m u l a s s h o w e d t h a t t h e v a l u e s d o n o t differ s i g n i f i c a n t l y , i n s p i t e o f t h e m o r e scientific (or l e s s u n s c i e n t i f i c ) basis of the modified formula (Given and Y a r z a b , 1975). H o w e v e r , the m o d i f i e d f o r m u l a lent itself r e a d i l y to s o m e further a p p r o x i m a t i o n s , w h i c h h a v e p r o v e d significant.

For t h e s e p u r p o s e s it m a y b e w o r t h w h i l e to e l i m i n a t e a s far as p o s s i b l e t h e effects o f t h e p r e s e n c e o f mineral matter on the volatile matter (VM) yield. T h e b e s t available m e a n s of p e r f o r m i n g t h i s is t h e e q u a t i o n d u e to L e i g h t o n a n d T o m l i n s o n (1960): V M 0 = V M de t - ( 0 . 1 3 A s h + 0 . 2 S P + 0 . 20) (14) It s h o u l d b e n o t e d t h a t h a v i n g a p p l i e d t h i s c o r r e c t i o n , t h e r e s u l t m u s t b e m u l t i p l i e d b y 100/(100 — M M ) to o b t a i n a V M o n the d m m f b a s i s .

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Analytical Methods for Coal and Coal Products. Volume II by Clarence Karr (Eds.)


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