Kwong Cheng Lang, Lian See Tan, Jully Tan, Azmi Mohd Shariff, Hairul Nazirah Abdul Halim
{"title":"Life cycle assessment of potassium lysinate for biogas upgrading","authors":"Kwong Cheng Lang, Lian See Tan, Jully Tan, Azmi Mohd Shariff, Hairul Nazirah Abdul Halim","doi":"10.37934/progee.22.1.2939","DOIUrl":null,"url":null,"abstract":"Monoethanolamine solvent (MEA) is a common solvent used in biogas upgrading plant for carbon dioxide (CO2) and hydrogen sulfide (H2S) removal. However, it has some downsides such as corrosive, high toxicity, and promotes products degradation. Alternatively, amino acid-based solvents such as potassium lysinate (LysK) have been found to have good absorption performance. It is also claimed to be more environmentally friendly as it is less toxic and has a good biodegradability. However, its actual environmental impact for the application of biogas upgrading has not been quantified in a detailed manner. Therefore, in this study, the environmental impact of LysK solvent is quantified from gate to grave in terms of Global Warming Potential (GWP), Acidification Potential (AP) and Eutrophication Potential (EP) using life cycle assessment (LCA) approach. The process was simulated using process simulator, SuperPro Designer version 10 to obtain the input-output data. LysK solvent has a low heat of absorption, which could result in lower CO2 emissions during the biogas upgrading process. However, due to its energy-intensive nature, the incineration process significantly contributed to GWP, AP, and EP. There were also emissions of NOx and SO2 from the flue gas of the incinerator. The findings of this research provide some insight on the environmental impact of utilising LysK for biogas upgrading.","PeriodicalId":235296,"journal":{"name":"Progress in Energy and Environment","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Energy and Environment","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.37934/progee.22.1.2939","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Monoethanolamine solvent (MEA) is a common solvent used in biogas upgrading plant for carbon dioxide (CO2) and hydrogen sulfide (H2S) removal. However, it has some downsides such as corrosive, high toxicity, and promotes products degradation. Alternatively, amino acid-based solvents such as potassium lysinate (LysK) have been found to have good absorption performance. It is also claimed to be more environmentally friendly as it is less toxic and has a good biodegradability. However, its actual environmental impact for the application of biogas upgrading has not been quantified in a detailed manner. Therefore, in this study, the environmental impact of LysK solvent is quantified from gate to grave in terms of Global Warming Potential (GWP), Acidification Potential (AP) and Eutrophication Potential (EP) using life cycle assessment (LCA) approach. The process was simulated using process simulator, SuperPro Designer version 10 to obtain the input-output data. LysK solvent has a low heat of absorption, which could result in lower CO2 emissions during the biogas upgrading process. However, due to its energy-intensive nature, the incineration process significantly contributed to GWP, AP, and EP. There were also emissions of NOx and SO2 from the flue gas of the incinerator. The findings of this research provide some insight on the environmental impact of utilising LysK for biogas upgrading.
单乙醇胺溶剂(MEA)是沼气升级装置中用于去除二氧化碳(CO2)和硫化氢(H2S)的常用溶剂。然而,它有一些缺点,如腐蚀性,高毒性,并促进产品降解。另外,以氨基酸为基础的溶剂,如赖氨酸钾(LysK)已被发现具有良好的吸收性能。据称,它更环保,因为它毒性更小,具有良好的生物降解性。然而,其对沼气改造应用的实际环境影响尚未得到详细的量化。因此,本研究采用生命周期评价(LCA)方法,从全球变暖潜势(GWP)、酸化潜势(AP)和富营养化潜势(EP)三个方面对LysK溶剂的环境影响进行了从头到尾的量化。利用过程模拟器SuperPro Designer version 10对该过程进行了仿真,得到了输入输出数据。LysK溶剂具有较低的吸收热,可以在沼气升级过程中降低CO2排放。然而,由于其能源密集型性质,焚烧过程对全球变暖潜能值、AP和EP的贡献很大。焚化炉的烟气中也有氮氧化物和二氧化硫的排放。本研究的结果为利用LysK进行沼气升级对环境的影响提供了一些见解。