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Oxygen and nitrogen complexes formation in coal char due to its reaction with NO at 100 °C in presence or absence of O 2 and/or H 2 O was studied by XPS. Formation of NO 2 and pyridinic complexes and a considerable increment of oxygen complex was observed. The NO 2 complexes can be formed in all cases, even when there is no molecular oxygen present in the gas mixture...
The reduction of NO by potassium-containing activated carbons and briquettes prepared from a bituminous coal was investigated. Partial washing of KOH activated carbons produced samples with different potassium contents. Briquetting with a binder containing potassium, at different binder/coal ratios, also allowed carbons with different potassium contents to be obtained. The NO-carbon reaction was...
Calcium-containing carbons were tested as low-temperature sorbents for SO 2 . CaO particles dispersed on carbon were prepared by thermal decomposition of calcium acetate. Samples with calcium contents ranging from 1.5 to 8.0 wt% were analysed. CO 2 chemisorption was used to characterize the area of the CaO particles available to interact with and retain SO 2 . CaO surface...
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