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Upgrading Coal-Derived Liquids by Means Other Than Hydrotreatment. I. Salmonella Microbial Mutagenicity

机译:通过加氢处理以外的方法升级煤成液体。 I.沙门氏菌微生物致突变性

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Studies by the Oak Ridge National Laboratory and at Pacific Northwest Laboratory on hydrogenated coal liquids have shown that hydrotreatment significantly reduces the toxicological properties of coal liquefaction products. However, the cost of hydrotreatment is significant. This report presents the initial results of studies designed to identify and evaluate promising non-hydrotreating processes for reducing the toxicological properties of coal liquids. In these studies to date, the biological evaluation has been limited to the Ames mutagenicity assay. Other bioassays including mouse dermal tumorigenicity and aquatic toxicity are in progress but have not yet been completed. Samples used in this study were two heavy fuel oils and one fuel oil blend obtained from the Catlettsburg, KY, H-Coal Pilot Plant. One of the heavy fuel oil samples was subjected to nine alternative processes which were designed to reduce or eliminate the microbial mutagenicity of the oil. Mutagenicity assays on the resulting products indicated that the first six treatments listed showed promise for removing mutagens. The fraction of the mass recovered after each of these treatments ranged from 70 to 85%. Five of the promising treatments identified in the exploratory study were applied to five H-coal liquid products. Each of the listed treatments (distillation, sulfuric acid treatment, deasphalting, pentane/furfural partition, and clay percolation) was found to significantly reduce the mutagenicity in the resulting product. (ERA citation 09:011416)

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