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OALib Journal期刊
ISSN: 2333-9721
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三聚氰胺浸渍活性炭用于低温nh3-scr脱硝的研究
, PP. 487-493
Keywords: 脱硝,活性炭,选择性催化还原,含氮官能团
Abstract:
？通过将三聚氰胺（m）浸渍在活性炭（ac）上制备了渗氮活性炭（acm），研究了浸渍时间、煅烧温度等因素对acm含氮量以及低温nh3-scr脱硝活性的影响。结果表明，三聚氰胺浸渍后可以提高活性炭的低温脱硝活性，在80℃下acm-5-900的no转化率达到51.67%，而ac只有21.92%。采用bet、元素分析及xps等分别对渗氮活性炭acm的结构、表面含氮量以及含氮官能团分布进行分析，表明含氮官能团的存在形式而不是含氮量影响渗氮活性炭的低温脱硝活性。同时no+o2-tpd结果表明，渗氮改性后脱硝活性提高主要是由于表面含氮官能团提高了活性炭对no的吸附和氧化。另外，so2的存在会抑制渗氮活性炭的低温脱硝活性。
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