Technical and economic analysis of underground coal gasification combined synthetic liquefied natural gas
PAN Xia
LI Jingang
ZHAO Juan
CHEN Feng
Abstract：In order to analyze the economic feasibility of the technology of underground coal gasification combined synthetic liquefied natural gas (UCG-LNG),based on the experimental data,taking the UCG-LNG project with an annual output of 200 million cubic meters LNG as example,the project's total investment,items and percentage of each item in the engineering cost and LNG production cost were calculated,and the project's sensitivity was analyzed.The results showed that the total investment was about RMB 1.87 billion,of which 88.3％ was engineering fee,while in the engineering fee,the total investment of air separation equipment,coal gas purification equipment and equipment of liquefied natural gas was up to 69.5％.In the condition of the LNG sale price was 3.21 ￥/m3,the project's pre-tax internal rate of return (IRR) was 10.90％,the investment recovery period was 9.85 years (including 3 years of construction period),it was economically feasible.Sensitivity analysis showed that the LNG's sales price had the most evident influence on the project's IRR.
Keywords：underground coal gasificationliquefied natural gaspre-tax internal rate of returnsensitivity analysis
Publication Date：2017-01-01