Liu Gaihuan, Zhu Lin, Cao Wenhao, Liu Huimin, He Yangdong
Key Laboratory of Gas Processing, Chemistry and Chemical Engineering Institute, Southwest Petroleum University, Chengdu 610500, Sichuan Province, China.
China Petroleum Engineering & Construction Corporation Southwest Company, Chengdu 610041, Sichuan Province, China.
ACS Omega. 2021 Sep 29;6(40):26180-26190. doi: 10.1021/acsomega.1c03165. eCollection 2021 Oct 12.
Given the drawbacks of the traditional MDEA absorption process, we introduced a hydrate-based gas separation approach. Then, to study the effectiveness of this method, we performed some hydrating experiments demonstrating that energy consumption could be remarkably reduced. However, the acid components (HS and CO) in the product gas failed to meet the specification requirements of the sales gas. Consequently, a new technique was developed that integrated hydrate-based gas separation and chemical absorption for the sweetening of natural gas with high HS and CO contents. To evaluate the performance of this new integrated method, technical comparisons based on simulation and experimental data were conducted. The results showed that the new integrated method could effectively remove sour components, which resulted in the product gas being able to meet the sales gas specifications. Additionally, the integrated technique consumed much less energy than the traditional MDEA absorption process and its amine regeneration duty was only 42% that of the MDEA method. What is more, upon an economical evaluation being performed, it was shown that the integrated technique tremendously reduced the investment and operating cost.
鉴于传统MDEA吸收工艺的缺点，我们引入了一种基于水合物的气体分离方法。然后，为了研究该方法的有效性，我们进行了一些水合实验，结果表明能耗可显著降低。然而，产品气中的酸性成分（H₂S和CO₂）未能满足销售气的规格要求。因此，开发了一种新技术，该技术将基于水合物的气体分离与化学吸收相结合，用于对高H₂S和CO₂含量的天然气进行脱硫。为了评估这种新集成方法的性能，基于模拟和实验数据进行了技术比较。结果表明，新的集成方法能够有效去除酸性成分，使产品气能够满足销售气规格。此外，该集成技术的能耗比传统MDEA吸收工艺少得多，其胺再生负荷仅为MDEA法的42%。更重要的是，经经济评估表明，该集成技术极大地降低了投资和运营成本。
