摘要
利用TG/MS联用装置 ,采用程序升温氧化法研究了Cu/AC和Fe/AC催化 吸附剂低温干法催化氧化苯酚的活性及其自身的烧蚀行为 .结果表明 ,Cu/AC和Fe/AC都具有较好的催化苯酚氧化活性 ,其活性及烧蚀行为受金属和载体的性质以及金属与载体间协同作用的影响 .吸附 催化氧化循环实验表明 ,金属 /AC催化 吸附剂的吸附容量随循环次数的增加而逐渐下降至一稳定值 .
Catalytic dry oxidation of phenol adsorbed on activated carbon (AC) supported metal catalyst-sorbent (metal/AC) is promising for phenolic wastewater treatment. The process consists of adsorption of phenol on the catalyst-sorbent in a fixed-bed reactor for a long period of time and catalytic dry oxidation of phenol adsorbed upon the discharge of water from the adsorption bed in a short period of time. In this work, TG/MS instrument was used to investigate the catalytic activity and ignition behavior of Cu/AC and Fe/AC catalyst-sorbents by temperature-programmed oxidation technique, and the influences of metal component and AC type on the performance of the metal/AC catalyst-sorbent were mainly discussed. The result indicated that both Cu/AC and Fe/AC showed high activity for catalytic oxidation of phenol, and Cu/AC was more active than Fe/AC, which showed high conversion of phenol and no production of phenol and benzene. The initial oxidation temperature of phenol was ca. 200 degrees C, and the ignition temperature of AC was about 130 degrees C higher than the initial phenol oxidation temperature. The difference in oxidation activity among the metal/AC catalyst-sorbents could be attributed to the differences of metal components, activated carbon, and the interaction between the metal and support. The test of eight adsorption-oxidation cycle of phenol on Cu/AC showed that its adsorption capacity decreased to an asymptotic level of about 70 mg/g with the increase of adsorption-regeneration cycle, which suggested that a steady state adsorption capacity could be reached.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2005年第2期143-147,共5页
基金
国家自然科学基金资助项目 (2 0 2 760 78).
关键词
铜
铁
活性炭
催化-吸附剂
苯酚
催化氧化
烧蚀
协同作用
copper
iron
active carbon
catalyst-sorbent
phenol
catalytic oxidation
ignition
interaction
