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During underground coal gasification (UCG), the expansion of the three reaction zones (oxidation zone, reduction zone, and dry distillation zone) is closely related to the stability of the gasification process and to the calorific value of the producer gas. The gasification channel structure also greatly affects the expansion process. In this article, the temperature field map and changes in producer...
Underground coal gasification (UCG) allows in situ conversion of unmineable coal deposits into a combustible gas. UCG involves a number of steps, including combustion, oxidation–reduction (REDOX) reactions, pyrolysis, and drying, within the gasification channel at high temperatures. Pyrolysis, in particular, plays a vital role in UCG. We herein investigated the pyrolysis behavior of lump lignite from...
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