加压富氧燃烧中多种污染物的形成与控制:二氧化硫、氮氧化物、颗粒物和汞

IF 10.1 1区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Engineering Pub Date : 2024-08-01 DOI:10.1016/j.eng.2024.03.005
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引用次数: 0

摘要

全氧燃烧是一种前景广阔的碳捕集技术,但常压全氧燃烧的净效率相对较低,限制了其在发电厂中的应用。在加压全氧燃烧(POC)中,锅炉、空气分离装置、烟气再循环装置以及二氧化碳净化和压缩装置均在高压下运行;这使得该过程更加高效,与常压相比具有许多优势,如氮氧化物排放量低、锅炉体积小等。POC 在工业应用方面也更有前景,近年来引起了广泛的研究兴趣。它可以产生纯度约为 95% 的高压二氧化碳,可直接用于提高石油采收率或地质封存。但是,污染物排放必须符合碳捕获、封存和利用的标准。由于 POC 中的氧气和水分浓度较高,通过 SOx 和 NOx 的氧化和溶解形成的酸会增加,导致管道和设备腐蚀。此外,颗粒物质(PM)和汞排放也会危害环境和人类健康。加压全氧燃烧与常压全氧燃烧的主要区别在于前者的压力较高;因此,必须了解这种压力对 POC 排放的污染物(包括 SOx、NOx、PM 和汞)的影响,并采用有效的控制方法来控制这些污染物的形成。本文回顾了有关 POC 系统中硫氧化物、氮氧化物、可吸入颗粒物和汞的形成与控制的最新研究进展,这些研究进展有助于此类系统中的污染物控制。
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Multi-Pollutant Formation and Control in Pressurized Oxy-Combustion: SOx, NOx, Particulate Matter, and Mercury

Oxy-combustion is a promising carbon-capture technology, but atmospheric-pressure oxy-combustion has a relatively low net efficiency, limiting its application in power plants. In pressurized oxy-combustion (POC), the boiler, air separation unit, flue gas recirculation unit, and CO2 purification and compression unit are all operated at elevated pressure; this makes the process more efficient, with many advantages over atmospheric pressure, such as low NOx emissions, a smaller boiler size, and more. POC is also more promising for industrial application and has attracted widespread research interest in recent years. It can produce high-pressure CO2 with a purity of approximately 95%, which can be used directly for enhanced oil recovery or geo-sequestration. However, the pollutant emissions must meet the standards for carbon capture, storage, and utilization. Because of the high oxygen and moisture concentrations in POC, the formation of acids via the oxidation and solution of SOx and NOx can be increased, causing the corrosion of pipelines and equipment. Furthermore, particulate matter (PM) and mercury emissions can harm the environment and human health. The main distinction between pressurized and atmospheric-pressure oxy-combustion is the former’s elevated pressure; thus, the effect of this pressure on the pollutants emitted from POC—including SOx, NOx, PM, and mercury—must be understood, and effective control methodologies must be incorporated to control the formation of these pollutants. This paper reviews recent advances in research on SOx, NOx, PM, and mercury formation and control in POC systems that can aid in pollutant control in such systems.

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来源期刊
Engineering
Engineering Environmental Science-Environmental Engineering
自引率
1.60%
发文量
335
审稿时长
35 days
期刊介绍: Engineering, an international open-access journal initiated by the Chinese Academy of Engineering (CAE) in 2015, serves as a distinguished platform for disseminating cutting-edge advancements in engineering R&D, sharing major research outputs, and highlighting key achievements worldwide. The journal's objectives encompass reporting progress in engineering science, fostering discussions on hot topics, addressing areas of interest, challenges, and prospects in engineering development, while considering human and environmental well-being and ethics in engineering. It aims to inspire breakthroughs and innovations with profound economic and social significance, propelling them to advanced international standards and transforming them into a new productive force. Ultimately, this endeavor seeks to bring about positive changes globally, benefit humanity, and shape a new future.
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