Thermal Demercurization of Coal Sorbents
Kenzhaliyev B. Volodin V. Trebukhov S. Nitsenko A. Linnik X. Magomedov D. Kilibayev Y.
June 2025Multidisciplinary Digital Publishing Institute (MDPI)
Metals
2025#15Issue 6
The extraction of mercury in the vapor–gas phase from coal sorbents, used to capture mercury from industrial waste gases, was studied herein to develop a unified technology. The behavior of mercury compounds (Hg2Cl2 and HgCl2) under conditions of thermal demercurization in a fore vacuum and at atmospheric pressure was examined using partial pressure diagrams. It was established that the stable phases during the technological process are vaporous mercury and Cl2. As a result of technological research and extensive testing with developed equipment at 400–800 °C and pressure in the range of 0.13–91.99 kPa, it was established that mercury in a vacuum under these conditions almost completely enters the vapor–gas phase (99.4–99.97%). A similar degree of mercury extraction from a coal sorbent was achieved at 600–800 °C at atmospheric pressure. A study was conducted, and it was established that the sorbent after thermal demercurization—in terms of its sorption capacity for gold—was practically comparable to fresh, unused Norit sorbent.
calomel , coal sorbent , demercurization , mercuric chloride , mercury , technology , vacuum
Text of the article Перейти на текст статьи
Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, 050010, Kazakhstan
Department of Standardization, Certification and Metrology, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Institute of Metallurgy and Ore Beneficiation JSC
Department of Standardization
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026