掺氢天然气分离工艺方案及经济性分析  

Scheme and economic analysis of hydrogen-blended natural gas separation

作　　者：谭遥 李琦[2] 王捷[3] 刘蔷 黄晨直 班久庆 Tan Yao;Li Qi;Wang Jie;Liu Qiang;Huang Chenzhi;Ban Jiuqing(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Planning Department of PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Southern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Luzhou,Sichuan,China;New Energy Business Department,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油西南油气田公司规划计划处 [3]中国石油西南油气田公司蜀南气矿 [4]中国石油西南油气田公司新能源事业部

出　　处：《石油与天然气化工》2023年第4期41-47,共7页Chemical engineering of oil & gas

摘　　要：目的天然气管道掺氢输送被认为是氢能大规模、低成本、长距离运输的重要途径之一。为了获得高纯度氢气,需要在终端将掺氢天然气进行分离。目前,单一的氢气分离手段难以直接适用于低含量氢的掺氢天然气分离。方法对比了几种常见的氢气分离技术的原理、工艺参数、优缺点等,结合掺氢天然气的特点,选定了“膜分离+变压吸附”耦合工艺路线,并针对掺氢比(摩尔分数,下同)分别为10%、15%、20%的掺氢天然气分离工艺方案进行了经济性分析,获得了各分离方案的成本。结果掺氢比为10%、15%、20%的综合分离成本分别为0.8467元/m^(3)氢气、0.5197元/m^(3)氢气、0.3826元/m^(3)氢气。结论较低含量的掺氢天然气分离成本较高,大规模推广应用仍面临经济性制约和诸多挑战。Objective Hydrogen-blended natural gas pipeline is regarded as one of the important ways to transport hydrogen energy in large scale,low cost and long distance.In order to obtain high purity hydrogen,hydrogen-blended natural gas needs to be separated at the terminal.At present,the common hydrogen separation methods are not directly applicable to the separation of hydrogen-blended natural gas with low hydrogen concentration.Methods This paper introduces the principle,process parameters,advantages and disadvantages of the common hydrogen separation technology.Combined with the characteristics of hydrogen-blended natural gas,the coupling process route of"membrane separation+pressure swing adsorption"is determined,and the economic analysis is made on the separation process scheme of hydrogen-blended natural gas with hydrogen blending ratio of 10 mol%,15 mol%and 20 mol%.The separation cost of each separation scheme is specified.Results The comprehensive separation cost of 10%hydrogen blending ratio is 0.8467 yuan/m^(3)hydrogen,the comprehensive separation cost of 15%hydrogen blending ratio is 0.5197 yuan/m^(3)hydrogen,and the comprehensive separation cost of 20%hydrogen blending ratio is 0.3826 yuan/m^(3)hydrogen.Conclusions The separation cost of hydrogen-blended natural gas with low concentration is high,and its large-scale application still faces economic constraints and challenges.

关 键 词：掺氢天然气 氢气分离 掺氢比 经济性分析 

分 类 号：TE64[石油与天然气工程—油气加工工程]