摘要
通过催化剂氧中毒实验进一步考察了氧对异丙醇法工业化生产甲基异丁基酮催化剂活性的影响。间歇通氧和连续通氧的实验结果表明氧浓度小于1000 ppm时,由于反应体系中副产的氢气对催化剂的还原作用在某种程度上抵消了氧的影响,催化剂为可逆失活;但当氧浓度超过3000 ppm时催化剂为不可逆失活,活性直线下降,且氧浓度越高催化剂活性下降越快。另外,实验表明氧浓度在3000 ppm和5000 ppm下,氧不仅破坏了多功能催化剂上的协同作用而且对异丙醇脱氢能力也有影响。
The influence of oxygen on catalyst activity of MIBK from isopropanol was explored through experiements. The experiment results of batch ventilation and continuous ventilation indicated that the catalyst was reversible when the oxygen concentration was less than 1 000 ppm because of the reduction of the byproduct-hydrogen which counteracts the influence of oxygen on catalyst. When the oxygen concentration was over 3 000 ppm, the catalyst was irreversible and its activity was of linear decrease. More over, the higher the oxygen concentration was, the faster the catalyst activity decreased. In addition, the experiment indicated that oxygen not only destroyed the synergistic reaction of multifunctional catalyst but also influenced the dehydrogenability of isopropanol, when the oxygen concentration was under 3 000 ppm and 5 000 ppm.
出处
《辽宁工学院学报》
2007年第1期39-41,共3页
Journal of Liaoning Institute of Technology(Natural Science Edition)
关键词
异丙醇
氧致失活
催化剂
分析
isopropanol
oxygen deactivity
catalyst
analysis
