Abstract

Work initiated in 1980 at the University of Alberta and the Alberta Research Council led to the development of the Agflotherm® process for low rank coals (LRC) beneficiation. This process can be considered as low-severity co-processing; upgrading two low grade fossil fuels, namely low rank coals and heavy oils, in a single process. The Agflotherm® process consists of two operations: preparation of coal/oil aggregates followed by their thermal treatment. The main products of this process are: •low moisture and ash solid fuel with properties similar to that of high quality thermal coals, and •an asphaltene-free value-added distillable oil characterized by reduced viscosity and heteroatom content. Numerous coal-oil combinations have been tested using the Agflotherm® process. In virtually every case, significant upgrading of low rank coals and heavy oils was achieved. This paper summarizes the result of developmental work carried out over a period of 10 years and financially supported by different government agencies and private industry.

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