文献类型：期刊文献

英文题名：Vacuum Exhaust Process in Pilot-Scale Vacuum Pressure Swing Adsorption for Coal Mine Ventilation Air Methane Enrichment

作者：Yang, Xiong[1,2];Liu, Yingshu[1,2];Li, Ziyi[1,2];Zhang, Chuanzhao[3];Xing, Yi[1]

第一作者：Yang, Xiong

通讯作者：Liu, YS[1];Li, ZY[1];Liu, YS[2];Li, ZY[2]

机构：[1]Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[2]Beijing Higher Inst Engn Res Ctr Energy Conservat, Beijing 100083, Peoples R China;[3]Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China

第一机构：Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China

通讯机构：[1]corresponding author), Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[2]corresponding author), Beijing Higher Inst Engn Res Ctr Energy Conservat, Beijing 100083, Peoples R China.

年份：2018

卷号：11

期号：5

外文期刊名：ENERGIES

收录：;EI(收录号：20182105222725);Scopus(收录号：2-s2.0-85047089433);WOS:【SCI-EXPANDED(收录号:WOS:000435610300008)】；

基金：The authors express their gratitude to the National Natural Science Foundation of China (51604016), The National High-tech Development Plan Project (No. 2009AA063201) and Fundamental Research Funds for the Central Universities (FRF-BD-16-009A).

语种：英文

外文关键词：vacuum exhaust; vacuum pressure swing adsorption (VPSA); ventilation air methane (VAM); enrichment

摘要：Recovery and treatment of methane from coal mine ventilation air methane (VAM) with cost-effective technologies have been an ongoing challenge due to low methane concentrations. In this study, a type of coconut shell-based active carbon was employed to enrich VAM with a three-bed vacuum pressure swing adsorption unit. A new vacuum exhaust step for the VPSA process was introduced. The results show that the vacuum exhaust step can increase the methane concentration of the product without changing adsorption and desorption pressure. Under laboratory conditions, the concentration of product increased from 0.4% to 0.69% as the vacuum exhaust ratio increased from 0 to 3.1 when the feed gas concentration was 0.2%. A 500 m(3)/h pilot-scale test system for VAM enrichment was built rendering good correlation with the laboratory results in terms of the vacuum exhaust step. By using a two-stage three-bed separation unit, the VAM was enriched from 0.2% to over 1.2%.