燃烧产物中二氧化碳萃取技术的效率分析

Q3 Energy

Energetika. Proceedings of CIS Higher Education Institutions and Power Engineering Associations Pub Date : 2022-12-07 DOI:10.21122/1029-7448-2022-65-6-524-538

V. Sednin, R. S. Ignatovich

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引用次数: 1

摘要

本文的主要目的是比较和分析现有的从燃烧产物中提取二氧化碳的技术，这些技术与使用当地燃料的小型热电联产工厂有关。本文简要介绍了从混合气体中提取二氧化碳技术的主要技术特点。给出了每种方法的具体特征和限制。基于Aspen Hysys和Aspen吸附软件包，对吸附、物理和化学吸附工艺过程进行数学建模。在模拟吸收过程时，考虑了木屑上能源实际运行条件下燃烧产物的组成特征，而在吸附过程中，燃烧产物的组成模拟采用二氧化碳和氮的二元混合物，摩尔含量分别为11%和89%。数值研究结果表明，在化学吸收技术的最佳实施模式下，燃烧产物的二氧化碳萃取率最高可达97%。用同样的方法，可以观察到所得二氧化碳的最高纯度，即考虑到水蒸气为86%，如果是干燥的则为99%。固定床物理吸收法提取二氧化碳的效果最差，其干燥二氧化碳的纯度为79%。因此，为了在实际应用中对本地燃料运行的微型热电联产电厂的燃烧产物进行深度利用，获得杂质含量低的二氧化碳，有必要采用化学吸收的方法。在固定床上使用物理吸收技术可用于减少能源排放或在二氧化碳纯度无关紧要的情况下。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Analysis of the Efficiency of Technologies for Extraction Carbon Dioxide from Combustion Products

The main purpose of the article is to compare and analyze existing technologies for extracting carbon dioxide from combustion products in relation to mini-CHP plants operating on local fuels. The article presents a brief overview of the main technical features of the implementation of carbon dioxide extraction technologies from gas mixtures. The specific features and limitations for each of the methods are shown. Mathematical modeling of technological processes of adsorption, physical and chemical absorption is carried out on the basis of Aspen Hysys and Aspen Adsorption software packages. When modeling absorption processes, the composition of combustion products characteristic of the actual operating conditions of an energy source on wood chips was considered, while for the adsorption process, the composition of combustion products was simulated by a binary mixture of carbon dioxide and nitrogen with a molar content of 11 and 89 %, respectively. The results of numerical research that were obtained have shown that the highest degree of carbon dioxide extraction from combustion products is 97 %, and it is achieved in the optimal mode of implementation of chemical absorption technology. With the same method, the highest degree of purity of the resulting carbon dioxide is observed, viz. 86 % taking into account water vapor and 99 % if it is dry. The least effective technology for extracting carbon dioxide was the method of physical absorption in a fixed bed, in which the degree of purity of the resulting dry carbon dioxide was 79 %. Therefore, for practical use in the deep utilization of combustion products of mini-CHP plants operating on local fuels, to obtain carbon dioxide with a low content of impurities, it is necessary to apply the method of chemical absorption. The use of physical absorption technology in a fixed bed can be used to reduce energy source emissions or in cases where the degree of purity of carbon dioxide does not matter.

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来源期刊

Energetika. Proceedings of CIS Higher Education Institutions and Power Engineering Associations Energy-Nuclear Energy and Engineering

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： The most important objectives of the journal are the generalization of scientific and practical achievements in the field of power engineering, increase scientific and practical skills as researchers and industry representatives. Scientific concept publications include the publication of a modern national and international research and achievements in areas such as general energetic, electricity, thermal energy, construction, environmental issues energy, energy economy, etc. The journal publishes the results of basic research and the advanced achievements of practices aimed at improving the efficiency of the functioning of the energy sector, reduction of losses in electricity and heat networks, improving the reliability of electrical protection systems, the stability of the energetic complex, literature reviews on a wide range of energy issues.