Elimination of formaldehyde over Cu-Al2O3 catalyst at room temperature.
Elimination of formaldehyde over Cu-Al2O3 catalyst at room temperature.
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DOI：
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发表时间：
2005
影响因子：
6.9
通讯作者：
Changbin Zhang;Xiaochen Shi;Hongwei Gao;Hong He
中科院分区：
文献类型：
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作者：
Changbin Zhang;Xiaochen Shi;Hongwei Gao;Hong He
研究了室温下 Cu-Al2O3 催化剂对甲醛 (HCHO) 的催化消除。结果表明，室温下HCHO没有氧化成CO2，但HCHO在催化剂表面发生吸附。随着气时空速（GHSV）和入口甲醛浓度的增加，达到饱和的时间成比例缩短。原位DRIFTS、密度泛函理论计算和程序升温解吸(TPD)结果表明，室温下HCHO在Cu-Al2O3上完全氧化成HCOOH。随着氦气流中温度的升高，HCOOH在催化剂表面完全分解为CO2，同时失活的Cu-Al2O3得到再生。此外，虽然Cu对Al2O3上HCHO的吸附没有明显影响，但Cu显着降低了HCOOH分解成CO2的温度。结果表明，Cu-Al2O3催化剂具有良好的HCHO去除能力，在室温下破坏HCHO方面具有广阔的应用前景。
Catalytic elimination of formaldehyde (HCHO) was investigated over Cu-Al2O3 catalyst at room temperature. The results indicated that no oxidation of HCHO into CO2 occurs at room temperature, but the adsorption of HCHO occurs on the catalyst surface. With the increase of gas hourly space velocity (GHSV) and inlet HCHO concentration, the time to reach saturation was shortened proportionally. The results of the in situ DRIFTS, Density functional theory calculations and temperature programmed desorption(TPD) showed that HCHO was completely oxidized into HCOOH over Cu-Al2O3 at room temperature. With increasing the temperature in a flow of helium, HCOOH was completely decomposed into CO2 over the catalyst surface, and the deactivated Cu-Al2O3 is regenerated at the same time. In addition, although Cu had no obvious influence on the adsorption of HCHO on Al2O3, Cu dramatically lowered the decomposition temperature of HCOOH into CO2. It was shown that Cu-Al2O3 catalyst had a good ability for the removal of HCHO, and appeared to be promising for its application in destroying HCHO at room temperature.