
Mechanochemical brown coal destructuring to produce humic species
Author(s) -
Т В Москаленко,
В А Михеев,
E. V. Vorsina
Publication year - 2021
Publication title -
iop conference series earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/773/1/012076
Subject(s) - oxidizing agent , brown coal , coal , reagent , yield (engineering) , humic acid , chemistry , hydrochloric acid , raw material , fly ash , environmental chemistry , chemical engineering , organic chemistry , materials science , metallurgy , fertilizer , engineering
The research data on the mechanical destruction of brown coal in the presence of an oxidizing agent are reported in the present paper. The study object is brown coal specimens with high (more than 30%) and low (less than 10%) initial contents of humic acids. The mechanochemical oxidation efficiency was evaluated by a change in the inorganic component content and in the yield of humic acids as the organic component in the ash composition. Hydrochloric acid solutions of 1-5% concentration were used as an oxidizing agent. Oxidation was considered and carried out as a raw material pretreatment with its subsequent processing to produce humic species, mechanical activation was introduced into the flowsheet for brown coal processing in view to foster interaction between solid particles and the reagent. The data obtained indicate the effectiveness of this process in terms of both increasing the yield of humic acids, and reducing the ash content in the prepared coal.
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