新奥无井式煤炭地下气化的研究进展及成果为其开展地下气化制液化天然气(UCG-LNG)奠定了基础,基于此,从技术和经济角度分析了利用O2/CO2作为气化剂进行煤炭地下气化生产用于合成液化天然气(LNG)的原料煤气的可行性。经核算,年产2亿Nm3LNG的地下气化制液化天然气项目所需总投资约为11.6亿元,投资回收期约7年,内部收益率约19.3%。通过内部收益率对液化天然气产量和售价的敏感性分析显示,在产量或售价下降10%的情况下,项目仍有盈利空间。

The research progress and achievements of the ENNOs no mine shaft type underground coal gasification would set up the base to develop the undergro und coal gasification for the liquefied natural gas.Based on the circumstances, from the technical and economic views, the paper analyzed the feasility of O2/CO2 as t he gasification agent to conduct the underground coal gasification production as the raw gas for the synthetic liquefied natural gas.With the accounting, an underground coal gasification to liquefied natural gas project with an annual production of 200 million cubic meters of liquefied natural gas would require a total investment about RM B 1.16 bilions, the investment recovery period would be about 7 years and the internal return rate would be about 19.3%.The sensitivity analysis on the internal return r ate of the liquefied natural gas and sales prices showed that the project would still have a profit space when the production and sales price reduced by 10%.