Thermal Regeneration of Manganese Supported on Activated Carbons Treated by HNO3 for Desulfurization

Autor:	Xue-Jiao Wang, Jianjun Li, Jiaxiu Guo, Yinghao Chu, Yi-Fan Qu, Yongjun Liu, Hua-Qiang Yin
Rok vydání:	2015
Předmět:	Chemistry General Chemical Engineering Energy Engineering and Power Technology chemistry.chemical_element Mineralogy Manganese Sulfur Flue-gas desulfurization law.invention Catalysis Fuel Technology Recovery factors law Specific surface area Thermal Calcination Nuclear chemistry
Zdroj:	Energy & Fuels. 29:1931-1940
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef502655k
Popis:	Manganese supported on activated carbons treated by HNO3 (Mn/NAC) was prepared using an excessive impregnation method and calcined at 650 °C, and the deactivation and recovery factors of Mn/NAC for desulfurization were investigated. The results showed that fresh catalyst calcined at 650 °C has breakthrough sulfur capacity of 141.8 mg/g and breakthrough time of 300 min and that the catalysts thermally regenerated at different temperatures under N2 atmosphere exhibit different removal capacity of SO2. After the catalysts undergo the first thermal regeneration at 650 °C, the catalysts have breakthrough sulfur capacity of 144.9 mg/g and breakthrough time of 299 min. These values are close to those of the fresh catalysts, suggesting that active sites can be recovered almost completely. In the following cycles, the SO2 removal capacity of the regenerated catalysts gradually decreases, indicating that active sites reduce gradually. The fresh catalyst has 710 m2/g specific surface area and 0.404 cm3/g total pore ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::06a72d3bddd962387c25a80d9857b2a4 https://doi.org/10.1021/ef502655k Zobrazit plný text záznamu