The rapid pyrolysis process using solid heat carrier is a developing technology which is used for the comprehensive utilization of lignite, oil shale or subbituminous coal.

固体热载体法低温快速干馏是一项对褐煤、油页岩和长焰煤进行综合加工利用的正在开发的新工艺。

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The majority of coal produced domestically is of the bituminous and subbituminous variety.

FORBES: Chinese Demand Will Drive This Wyoming Coal Stock

Due to costs associated with reducing sulfur emissions resulting from stricter pollution regulations, subbituminous coal is actually more economical for energy generation.

FORBES: Chinese Demand Will Drive This Wyoming Coal Stock