Chemical and biological effects of heavy distillate recycle in the SRC-II process

Technical Report · Thu Dec 01 04:00:00 EST 1983

DOI:https://doi.org/10.2172/5434393· OSTI ID:5434393

Wilson, B W; Pelroy, R A; Anderson, R P; Freel, J

Recent work from the Merriam Laboratory continuous coal liquefaction units shows that heavy distillate from the SRC-II process can be recycled to extinction, and hence a distillate product boiling entirely below 310/sup 0/C (590/sup 0/F) (or other selected boiling points) is feasible. In these runs distillate yield was not reduced; gas make was unaffected; and hydrogen consumption was increased only slightly, in keeping with the generally higher hydrogen content of lighter end products. Total distillate yield (C/sub 5/-590/sup 0/F) was 56 wt %, MAF coal in runs with subbituminous coal from the Amax Belle Ayr mine. Product endpoint is well below 371/sup 0/C (700/sup 0/F), the temperature above which coal distillates appear to become genotoxic; and the product was shown to be free of mutagenic activity in the Ames test. Chemical analyses showed both the < 270/sup 0/C (< 518/sup 0/F) and the < 310/sup 0/C (< 590/sup 0/F) distillates to be essentially devoid of several reference polycyclic compounds known to be carcinogenic in laboratory animals. Tests for tumorigenic or carcinogenic activity were not carried out on these materials. However, a comparison of chemical data from the Merriam heavy distillate samples with data on the other SRC-II distillates where carcinogenesis or tumorigenesis data is available leads to the expectation that < 371/sup 0/C (< 700/sup 0/F) materials from the Merriam Laboratory will have greatly reduced tumorigenic and carcinogenic activity in skin painting tests. Other studies suggest the product should be more readily upgraded than full-range (C/sub 5/-900/sup 0/F) distillate.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830; AC22-82PC50001
• OSTI ID: 5434393
• Report Number(s): PNL-4815; ON: DE84005070
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
&amp; Peat-- Hydrogenation &amp; Liquefaction
AROMATICS
BACTERIA
BIOLOGICAL EFFECTS
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CARCINOGENESIS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL
COAL LIQUEFACTION
COAL LIQUIDS
CONSUMPTION RATES
DATA
DIAGRAMS
DISTILLATES
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLOWSHEETS
FLUIDS
FOSSIL FUELS
FRACTIONATION
FUELS
GAS CHROMATOGRAPHY
HYDROCARBONS
HYDROGEN
HYDROGENATION
INFORMATION
LIQUEFACTION
LIQUIDS
MASS SPECTROSCOPY
MATERIALS
MICROORGANISMS
MUTAGEN SCREENING
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PATHOGENESIS
POLYCYCLIC AROMATIC HYDROCARBONS
PROCESSING
RECYCLING
REFINING
SALMONELLA
SALMONELLA TYPHIMURIUM
SCREENING
SEPARATION PROCESSES
SPECTROSCOPY
SRC-II PROCESS
SUBBITUMINOUS COAL
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
YIELDS