摘要
对活性炭载氧化铜和氧化铈(Cu-Ce/AC)吸附-催化剂在连续吸附-催化氧化苯酚循环过程中的催化氧化活性和失活原因进行了研究。结果表明,Cu-Ce/AC的苯酚吸附性能和催化氧化活性随着吸附-催化氧化循环次数的增加而逐渐降低,经5次循环后,苯酚的初始氧化温度提高约25℃。通过对使用过的Cu-Ce/ACs进行XPS、ICP分析,发现Ce和Cu的流失较小,苯酚残留物覆盖表面Ce和Cu是苯酚催化氧化活性降低的主要原因,残留物主要含有C—O—C和C—OH等官能团。
Catalytic activity and deactivation of a Cu-Ce/AC （activated carbon supported copper and cerium） catalyst-sorbent for oxidation of adsorbed phenol was investigated. Results show that phenol adsorption capacity and oxidation activity of Cu-Ce/AC decrease with an increase in adsorption-oxidation cycles. Initial phenol oxidation temperature of Cu-Ce/AC increases by 25 ℃ in 5 cycles. The deactivation of the catalyst is attributed to the formation of organic residues from oxidative coupling of phenol, which covers the Ce and Cu sites on the surface. C-O-C and C-OH groups were observed in the residues.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2009年第1期93-97,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(20276078)
关键词
干法催化氧化
炭基吸附剂
炭基催化剂
苯酚
失活
catalytic dry oxidation
carbon-supported catalyst
carbon-based sorbent
phenol
deactivation
