The basic characteristics of gas convective diffusion of underground coal gasification (UCG) are studied.

气化气体对流扩散的基本特征。

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At that time underground coal gasification (UCG, also known as in-situ coal gasification or ISCG) was increasingly seen as a relatively low-impact way of tapping the huge US coal resource, while potentially managing emissions.

FORBES: Underground Coal Gasification: A Trend Worth Watching