利用胺和吸水法模拟从沼气中提取co2和h2s的过程

Yu.V. Ivanov, O. Pyatnychko, G. Zhuk, L. Onopa, S. P. Krushnevich, A. V. Verbovsky
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引用次数: 3

摘要

利用最普遍的胺法和除二氧化碳、硫化氢的吸水法,对沼气生产生物甲烷的工艺回路进行了研究。利用软件建模的方法,提出了一种有效的吸附剂MDEAmod -甲基二乙醇胺和单乙醇胺的水溶液。这种吸收剂可以有效地应用于各种沼气,压力范围从大气到0.28 MPa。同时,解吸塔再沸器的热负荷比使用单乙醇胺溶液少1.5 ~ 4倍。利用胺和水技术生产生物甲烷的能源成本比较表明,考虑到胺法生产生物甲烷的产量比吸水法高8 - 15%(由于溶解在水中而损失CH4),并利用这一差异加热胺解吸器再沸器,这些成本是比较的。在需要生产二氧化碳作为商品产品的情况下,胺法具有优势,因为在该过程中获得的二氧化碳浓度为98%,而在使用吸水法时为80%。模拟СО2和氨吸附法脱除H2S过程的结果可用于沼气精炼和生产类似天然气的生物甲烷技术,以及作为商业产品的二氧化碳。圣经24,图6,表4。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SIMULATION OF CO2 AND H2S EXTRACTION PROCESSES FROM BIOGAS USING AMINE AND WATER ABSORPTION
The research of technological circuits of biomethane from biogas production with the use of the most widespread amine and water absorption processes of carbon dioxide and hydrogen sulfide removal from biogas is carried out. With the use of software modeling for the amine process, an effective absorbent MDEAmod — an aqueous solution of methyldiethanolamine and monoethanolamine is proposed. This absorbent can be effectively applied to a wide range of biogas and for a range of pressure practically from atmospheric to 0.28 MPa. At the same time, the heat load of desorber reboiler is less in 1.5–4 times compared with the use of monoethanolamine solutions.Comparison of energy costs for the production of biomethane using amine and water technology shows that taking into account the greater yield of biomethane in the amine process by 8–15 % than in water absorption (loss of CH4 due to dissolution in H2O), and the use of this difference to heat the amine desorber reboiler these costs are comparative. In the case of the need to produce carbon dioxide as a commodity product, the amine process has an advantage, since the CO2 achieved in this process has a concentration of 98 % versus 80 % when using water absorption. The obtained results of simulation of СО2 and H2S removal process by amine and water absorption can be used in technologies of biogas refining and production of biomethane - an analogue of natural gas, as well as carbon dioxide as a commercial product. Bibl. 24, Fig. 6, Tab. 4.
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