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By Randall E.; Crelling, John C. Winans

content material: Chemistry and characterization of coal macerals : assessment / Randall E. Winans and John C. Crelling --
Premaceral contents of peats correlated with proximate and supreme analyses / A.D. Cohen and M.J. Andrejko --
Characterization of coal macerals through fluorescence microscopy / John C. Crelling and David F. Bensley --
Microscopic IR spectroscopy of coals / Douglas Brenner --
adaptations in houses of coal macerals elucidated by way of density gradient separation / Gary R. Dyrkacz, C.A.A. Bloomquist, L. Ruscic, and E. Philip Horwitz --
Structural diversifications in coal macerals : program of two-dimensional and dipolar dephasing ¹³C-NMR options / Ronald J. Pugmire, Warner R. Woolfenden, Charles L. Mayne, Jirina Karas, and David M. supply --
Relationships among the natural constitution of vitrinite and chosen parameters of coalification as indicated through Fourier remodel IR spectra / Deborah W. Kuehn, Alan Davis, and Paul C. Painter --
Electron spin resonance of remoted coal macerals : initial survey / B.G. Silbernagel, L.A. Gebhard, Gary R. Dyrkacz, and C.A.A. Bloomquist --
Reactivity and characterization of coal macerals / Randall E. Winans, Ryoichi Hayatsu, Robert G. Scott, and Robert L. McBeth --
elements of the hydrogen atom move reactions of macerals / Chol-Yoo Choi and Leon M. Stock.

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By Randall E.; Crelling, John C. Winans

content material: Chemistry and characterization of coal macerals : assessment / Randall E. Winans and John C. Crelling --
Premaceral contents of peats correlated with proximate and supreme analyses / A.D. Cohen and M.J. Andrejko --
Characterization of coal macerals through fluorescence microscopy / John C. Crelling and David F. Bensley --
Microscopic IR spectroscopy of coals / Douglas Brenner --
adaptations in houses of coal macerals elucidated by way of density gradient separation / Gary R. Dyrkacz, C.A.A. Bloomquist, L. Ruscic, and E. Philip Horwitz --
Structural diversifications in coal macerals : program of two-dimensional and dipolar dephasing ¹³C-NMR options / Ronald J. Pugmire, Warner R. Woolfenden, Charles L. Mayne, Jirina Karas, and David M. supply --
Relationships among the natural constitution of vitrinite and chosen parameters of coalification as indicated through Fourier remodel IR spectra / Deborah W. Kuehn, Alan Davis, and Paul C. Painter --
Electron spin resonance of remoted coal macerals : initial survey / B.G. Silbernagel, L.A. Gebhard, Gary R. Dyrkacz, and C.A.A. Bloomquist --
Reactivity and characterization of coal macerals / Randall E. Winans, Ryoichi Hayatsu, Robert G. Scott, and Robert L. McBeth --
elements of the hydrogen atom move reactions of macerals / Chol-Yoo Choi and Leon M. Stock.

Show description

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Extra info for Chemistry and Characterization of Coal Macerals

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B R E N N E R Microscopic IR Spectroscopy 49 not be sampled u n i f o r m l y . This can be a problem f o r a heterogeneous material such as c o a l . "Thin s e c t i o n samples o f coal having a r e l a t i v e l y uniform t h i c k n e s s of 20 micrometers or l e s s have been used o c c a s i o n a l l y i n the past (_6). However, the d i f f i c u l t i e s i n preparing these t h i n s e c t i o n samples and problems of contamination with the adhesives used i n the p r e p a r a t i o n of the s e c t i o n s {]_) has l i m i t e d t h e i r usage.

In some cases, i t i s even more s e n s i t i v e than normal pétrographie a n a l y s i s . The i n i t i a l r e s u l t s of fluorescence spect r a l s t u d i e s show that the v a r i o u s f l u o r e s c e n t macérais i n s i n g l e c o a l s can be s t a t i s t i c a l l y d i s c r i m i n a t e d on the b a s i s of t h e i r s p e c t r a l parameters and that even v a r i e t i e s of a s i n g l e maceral type can be d i s t i n g u i s h e d . Although the spectra obtained at t h i s time are r a t h e r broad and not s u i t a b l e f o r chemical s t r u c t u r e a n a l y s i s , the p o t e n t i a l f o r s t r u c t u r a l a n a l y s i s e x i s t s and may be r e a l i z e d with improvements i n instrumentation.

3600 3200 2800 2400 2000 1800 1600 Frequency (cm ) 1400 1200 1000 800 -1 Figure 3 . IR spectra of microscopic regions of v i t r i n i t e and l i p t i n i t e i n the same t h i n s e c t i o n sample of I l l i n o i s No. 6 c o a l . 54 COAL MACERALS was taken without the sample present but with a l l other c o n d i t i o n s the same. The subsequent sample spectra are a u t o m a t i c a l l y normalized w i t h respect t o the background spectrum which i s stored i n the microcomputer. Each of the two sample spectra i n Figure 3 are 2 minute s c a n s .

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