Abstract Underground coal gasification can convert deep coal resources into synthesis gas for use in the production of electricity, fuels and chemicals. This paper provides a review of the various methods of undertaking underground coal gasification and observations from demonstrations of the process in the field. A general representation of the underground process is presented, along with an identification of the various zones and associated governing phenomena. The main factors affecting the performance of underground coal gasification, such as coal rank, depth and thickness and oxidant composition and injection rate are examined in detail. A brief assessment of the economic and environmental considerations relevant to underground coal gasification projects is presented. Finally, guidelines for site and oxidant selection are provided based on the learnings from prior demonstration projects.

中文翻译：

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地下煤气化 - 第一部分：现场演示和工艺性能

摘要 煤炭地下气化可将深层煤炭资源转化为合成气，用于生产电力、燃料和化学品。本文回顾了进行煤炭地下气化的各种方法，并通过现场过程演示进行了观察。介绍了地下过程的一般表示，以及各种区域和相关管理现象的识别。详细研究了影响煤​​炭地下气化性能的主要因素，如煤阶、深度和厚度以及氧化剂成分和注入速度。简要评估了与煤炭地下气化项目相关的经济和环境考虑因素。最后，