非平衡等离子体协同作用光催化剂催化降解苯

采用非平衡等离子体与光催化剂相结合,对苯的降解进行了实验研究。考察了以不同吸附能力的玻璃球和γ-Al2O3为载体对苯降解率、碳平衡、CO2选择性、NOx及O3生成量的影响;研究了以γ-Al2O3为载体时,水蒸气含量对苯的降解率、碳平衡、CO2选择性、NOx及O3生成量的影响。实验结果表明,以具有吸附性的γ-Al2O3为载体可提高苯的降解率;当能量密度为618J/L时,苯的降解率可达98%;同时可降低O3的生成量,但NOx生成量增加;以γ-Al2O3为载体时,随水蒸气含量的增加,苯的降解率降低,特别是在低能量密度时,水蒸气对苯降解率的影响更为显著,但水蒸气的加入可抑制O3的生成,同时可提高碳平衡值。

Decomposition of Benzene by Integrated Action of Non-Thermal Plasma and Photocatalyst

Decomposition of benzene was studied by integrated action of non-thermal plasma and titania photocatalyst supported on γ-Al2O3.The effects of support type and H2O vapor content in benzene vapor on decomposition rate of benzene,carbon balance,selectivity to CO2,and amounts of undesirable NOx and O3 by-products were investigated.γ-Al2O3 as catalyst support can improve decomposition rate of benzene,reduce formation of O3,but increase formation of NOx.When specific energy density is 618 J/L,decomposition rate of benzene can reach 98% in absence of H2O.But decomposition rate of benzene decreases with presence and increase of H2O vapor content in benzene vapor,especially at lower specific energy density.Addition of H2O vapor can reduce formation of O3 and raise carbon balance extent.