Evaluation of Mercury Removal Efficiency of Coal through Solvent Extraction Procedures

Abstract

Mild pyrolysis is one of the precombustion mercury control techniques. Mercury removal efficiency through mild pyrolysis has close relation with the weak thermal stability of mercury in coal. The thermal stability mercury in coal has been identified by solvent extraction procedures combined with temperature-programmed decomposition techniques. The result shows that the carbonate-bound mercury, iron−manganese oxide-bound mercury, organic-bound mercury, and sulfidebound mercury should be classified into the weak thermal stability mercury and can be removed by mild pyrolysis. Therefore, a method can be established to evaluate the mercury removal ability by determining the carbonate-bound mercury, iron− manganese oxide-bound mercury, organic-bound mercury, and sulfide-bound mercury through solvent extraction procedures. This result of this method is in good agreement with the result of heat treatment experiment, indicating that this method is an effective approach to evaluate the mercury removal efficiency through mild pyrolysis.

Post-synthetic thiol modification of covalent organic frameworks for mercury(II) removal from water

“…Exposure to Hg(II) can cause eye, muscle, and skin damage, dermatitis, and kidney, liver, heart, and central nervous system damage [ 2 , 3 ]. There have been significant efforts to effectively remove mercury from aqueous environment [ [4] , [5] , [6] ]. Among the numerous techniques for this purpose, adsorption is a promising method to address this environmental challenge [ 6 , 7 ].…”

Review and Perspectives of Mercury Removal by Spinel Compounds

“…However, the extent of Hg 0 oxidation and subsequent removal by WFGD is still limited, and more controlling measures are still needed. Depending on the position in relation to the combustion process, the methods for mercury removal from CFPPs may be divided into precombustion, 36,37 combustion, and postcombustion categories. 9, 38,39 Postcombustion mercury removal is currently the main research area of mercury removal technology, which can be divided into adsorption, catalytic oxidation, and synergistic technology.…”

“…Depending on the position in relation to the combustion process, the methods for mercury removal from CFPPs may be divided into precombustion, , combustion, and postcombustion categories. ,, Postcombustion mercury removal is currently the main research area of mercury removal technology, which can be divided into adsorption, catalytic oxidation, and synergistic technology. Activated carbon is currently the most widely used and commercialized adsorbent. − Catalytic oxidation of Hg 0 mainly consists of homogeneous and heterogeneous oxidation.…”