Research and development of Hg-CEMS flue gas pre-treatment technology

• Published in: Méitàn xuébào Vol. 49; no. 2; pp. 1037 - 1051
• Main Authors: Yufeng DUAN, Haiyang LI, Hongjian TANG, Tianfang HUANG, Qihang JIN, Lina SUN, Yu SHANG, Chenchi LI, Yuxing ZHOU, Tianshuo LI, Xiaoshuo LIU, Yanjun ZUO, Jiangyi TONG, Rui JIN
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Journal of China Coal Society 01.03.2024
• Subjects: dilution sampling; hg-cems; hg0/hg2+ partitioning and transformation; hg2+ calibration gas; pre-treatment unit
• ISSN: 0253-9993
• DOI: 10.13225/j.cnki.jccs.ZZ23.1251

In view of the natural endowment of mercury in fossil fuels and mineral resources, as well as the mercury emission controlling and regulating in the energy and resource utilization processes, the research and development on the mercury continuous emissions monitoring system (Hg-CEMS) with proprietary intellectual property rights is the most important requirement in science and technology in China. As a critical component of the Hg-CEMS system, the flue gas pretreatment system is a core technology that limits the development and application of the Hg-CEMS technology in China. This paper presents a comprehensive review of the research progress in the four key modules of the Hg-CEMS flue gas pretreatment technology, including the dilution sampling, Hg0/Hg2+ separation, Hg2+ reduction and Hg2+ calibration gas generation. Firstly, the dilution sampling techniques are highlighted in their characteristics and principles. The working principles, structures, and design considerations of the critical parameters for bot