{"title":"采用低温活性炭吸附的高效蒸发气储存","authors":"J.K. Wu , Y.X. Zhang , M. Yu , L. Jiang","doi":"10.1016/j.jgsce.2025.205765","DOIUrl":null,"url":null,"abstract":"<div><div>Boil-off gas (BOG) leakage poses significant challenges during LNG storage and transportation, since it leads to resource waste, environmental damage, and safety risks. Compared with widely used cryogenic re-liquefaction in BOG recovery, low-temperature adsorption has attracted increasing attention due to relatively low equipment investment and energy consumption. This work aims to investigate the feasibility of cryogenic adsorption for BOG recovery. Biomass-derived coconut shell activated carbon materials for low-temperature methane adsorption are prepared, and their BOG recovery performance are systematically investigated. Results indicate that KOH activated coconut shell activated carbon (CHCS-KOH) has higher specific surface area (1710.28 m<sup>2</sup>/g) and optimal microporous structure for methane adsorption, achieving a remarkable methane adsorption capacity of14.37 mmol/g at the cryogenic temperature of 133 K, which is rarely reached in previous test. A modified D-A model is successfully fitted for the first time to describe methane adsorption across a wide temperature range from 133 K to 293 K. Based on CHCS-KOH, a BOG adsorption recovery system is established and its performance is analyzed. The optimal storage temperature is determined to be 160 K and minimum recovery energy consumption is 0.5645 kW h/kg with a recovery rate of 89.47 %. These findings may provide new methods for the research on low temperature methane adsorption and BOG recovery.</div></div>","PeriodicalId":100568,"journal":{"name":"Gas Science and Engineering","volume":"144 ","pages":"Article 205765"},"PeriodicalIF":5.5000,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-efficient boil-off gas storage using low-temperature activated carbon adsorption\",\"authors\":\"J.K. Wu , Y.X. Zhang , M. Yu , L. Jiang\",\"doi\":\"10.1016/j.jgsce.2025.205765\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Boil-off gas (BOG) leakage poses significant challenges during LNG storage and transportation, since it leads to resource waste, environmental damage, and safety risks. Compared with widely used cryogenic re-liquefaction in BOG recovery, low-temperature adsorption has attracted increasing attention due to relatively low equipment investment and energy consumption. This work aims to investigate the feasibility of cryogenic adsorption for BOG recovery. Biomass-derived coconut shell activated carbon materials for low-temperature methane adsorption are prepared, and their BOG recovery performance are systematically investigated. Results indicate that KOH activated coconut shell activated carbon (CHCS-KOH) has higher specific surface area (1710.28 m<sup>2</sup>/g) and optimal microporous structure for methane adsorption, achieving a remarkable methane adsorption capacity of14.37 mmol/g at the cryogenic temperature of 133 K, which is rarely reached in previous test. A modified D-A model is successfully fitted for the first time to describe methane adsorption across a wide temperature range from 133 K to 293 K. Based on CHCS-KOH, a BOG adsorption recovery system is established and its performance is analyzed. The optimal storage temperature is determined to be 160 K and minimum recovery energy consumption is 0.5645 kW h/kg with a recovery rate of 89.47 %. These findings may provide new methods for the research on low temperature methane adsorption and BOG recovery.</div></div>\",\"PeriodicalId\":100568,\"journal\":{\"name\":\"Gas Science and Engineering\",\"volume\":\"144 \",\"pages\":\"Article 205765\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-08-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Gas Science and Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2949908925002298\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"0\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Gas Science and Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2949908925002298","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
High-efficient boil-off gas storage using low-temperature activated carbon adsorption
Boil-off gas (BOG) leakage poses significant challenges during LNG storage and transportation, since it leads to resource waste, environmental damage, and safety risks. Compared with widely used cryogenic re-liquefaction in BOG recovery, low-temperature adsorption has attracted increasing attention due to relatively low equipment investment and energy consumption. This work aims to investigate the feasibility of cryogenic adsorption for BOG recovery. Biomass-derived coconut shell activated carbon materials for low-temperature methane adsorption are prepared, and their BOG recovery performance are systematically investigated. Results indicate that KOH activated coconut shell activated carbon (CHCS-KOH) has higher specific surface area (1710.28 m2/g) and optimal microporous structure for methane adsorption, achieving a remarkable methane adsorption capacity of14.37 mmol/g at the cryogenic temperature of 133 K, which is rarely reached in previous test. A modified D-A model is successfully fitted for the first time to describe methane adsorption across a wide temperature range from 133 K to 293 K. Based on CHCS-KOH, a BOG adsorption recovery system is established and its performance is analyzed. The optimal storage temperature is determined to be 160 K and minimum recovery energy consumption is 0.5645 kW h/kg with a recovery rate of 89.47 %. These findings may provide new methods for the research on low temperature methane adsorption and BOG recovery.