研究论文
任维,张建胜,姜孝国,吕俊复,姚纪恒,岳光溪.焦炭流化床燃烧条件下氧化亚氮生成途径的实验研究[J].环境科学学报,2003,23(3):408-410
焦炭流化床燃烧条件下氧化亚氮生成途径的实验研究
- Experimental study on nitrous oxide formation during char combustion at fluidized bed conditions
- 基金项目:国家十五科技攻关项目(200113A401A03);国家重大基础研究规划项目(G1999022204)
- 姜孝国
- 哈尔滨锅炉有限责任公司,哈尔滨 150040
- 姚纪恒
- 哈尔滨锅炉有限责任公司,哈尔滨 150040
- 摘要:在小型电加热流化床实验台上对一种无烟煤焦炭燃烧过程中氧化亚氮生成途径进行了实验研究,实验结果表明,HCN的气相氧化反应和NO与焦炭表面多相反应均为N2O的来源.HCN的析出是焦炭脱挥发分的结果,制焦温度越高,HCN的生成机会越小,HCN的氧化反应在N2O生成过程中作用越小,这时,NO和焦炭表面的多相反应主导着N2O的生成.
- Abstract:Nitrous oxide formation during char combustion was investigated at a batch scale electrically heated qartz tube fluidized bed reactor. Experimental results showed that HCN oxidation is a nitrous oxide formation path during char combustion. The reaction of NO with char particle surface also contributes to nitrous oxide formation. HCN is from char devolatilization during combustion. The role of HCN oxidation on nitrous oxide formation becomes slight when char prepare temperature increases, whereas the heterogeneous reaction of NO with particle surface becomes dominant for nitrous oxide formation.
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