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Coal carbonization studies. Altering composition and yield of volatile products by increasing the free space above the charge.

Ortuglio C; Walters JG; Wolfson DE

NTIS: PB 192 304, 1970; :1-11

10009040

The effect of cracking by increasing the free space above the charge on the composition and yields of the volatile products from carbonization of Pittsburgh-bed coal and one industrially used blend from eastern United States and one from western United States was investigated with the bm-aga carbonization apparatus. Increasing the free space above the charge from 1 inch to 3 inches, to 6 inches, and to 9 inches resulted in lower tar yields and increased gas and oil yields. Anthracene and naphthalene yields were increased; quinoline and benzene insoluble fractions of both the tar and pitch increased considerably with increased free space, although the carbon content of the tars and pitches increased only slightly. Increased cracking, occasioned by the increase in free space, resulted in a decrease in the yields of tar acids, tar bases, neutral oils, olefins, aromatics, and paraffins and naphthenes. Gas composition was relatively constant; hydrogen and methane tended to increase and ethane to decrease. Results of the investigation are being used to design a unit to upgrade the volatile products of carbonization by cracking the hot products as they leave the carbonization chamber.

Mining-industry; Coal-mining; Volatiles; Gases; Oils; Tars; Anthracenes; Naphthalenes; Quinolines; Benzenes; Carbon-compounds; Coal-tar-pitch; Olefins; Aromatic-hydrocarbons; Hydrocarbons; Paraffin-compounds; Paraffins; Methanes

120-12-7; 91-20-3; 91-22-5; 71-43-2; 74-82-8

19700101

IH; Report of Investigation

1970

PB-192304

A03

RI 7400

PERC

NTIS: PB 192 304

PA