高校化学工程学报Issue(6)：1438-1444,7.DOI:10.3969/j.issn.1003-9015.2015.06.022
Mn-Ce/活性焦低温脱硝催化剂热再生机制
Thermal Regeneration Mechanisms of Mn-Ce/Activated Coke (AC) Catalysts for Low Temperature NOxReduction
摘要
Abstract
Mn-Ce/activated coke (AC) catalysts were synthesized via an impregnation method. A fixed bed was used to simulate a moving bed reactor under two stages with desulfurization and denitrification processes, and Mn-Ce/AC catalysts saturated with SO2 were prepared. Nitrogen and water vapor was used to thermally regenerate the catalyst. However, all of the NOx conversions rates were lower than 50%. Brunauer-Emmett-Teller method (BET), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and temperature programmed desorption (TPD) were used to characterize the catalyst and the results show that the surface area and pore volume of the regenerated catalyst decreased significantly, with no recovery of Ce3+ and Lewis acid sites. XPS results show that SO2 reacted with CeO2 to form Ce2(SO4)3 or Ce(SO4)2, which reduced the active centers of Ce and blocked catalyst pores, and reduced NOx conversion rates of the regenerated catalysts.关键词
烟气/活性焦/催化剂/再生/脱硝Key words
flue gas/activated coke/catalysts/regeneration/denitration分类
资源环境引用本文复制引用
杨柳,谭月,盛重义,周爱奕,胡宇峰,单云霞..Mn-Ce/活性焦低温脱硝催化剂热再生机制[J].高校化学工程学报,2015,(6):1438-1444,7.基金项目
国家高技术研究发展计划(2013AA0654101)；江苏省自然科学基金(BK20130907)；江苏省高校自然科学研究项目(13KJB610012)。 （2013AA0654101）
