Abstract
Since the 1920s, a variety of studies have investigated the effects of mineral matter on coal conversion processes. This interest accelerated greatly about 10 years ago. We have followed the development of this field from those investigations that screened the effects of various mineral types on coal conversion processes to those investigations that studied the detailed mechanism of a specific mineral on either coal gasification or coal liquefaction. As an outgrowth of this field of study, we have witnessed the development of both catalytic coal gasification and slurry phase catalytic coal liquefactions. We will review the field of mineral matter effects on coal processing and discuss the impact on the coal conversion industry.
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