摘要
在实验室模拟了负载型V2O5-WO3/TiO2催化剂砷的中毒。采用催化剂活性测试,NH3-TPD、H2-TPR、XPS技术表征催化剂中毒特性。实验表明,砷中毒使催化剂活性降低明显。NH3-TPD、H2-TPR、XPS表征结果表明,As中毒使催化剂表面酸性降低,催化剂中W、Ti化学形态不受砷中毒的影响,而砷中毒改变了催化剂表面钒的化学形态,认为酸性降低和钒化学形态的改变引起了催化剂的中毒。
The process of arsenic poisoning for the loading catalyst of V2O5-WO3 /TiO2 was simulated in the experiment.The poisoning characters of the catalyst were studied by means of activity testing,NH3-TPD,H2-TPR and XPS.The results show that after the poisoning of arsenic,the activity of catalyst decreases greatly.Meanwhile,the NH3-TPD,H2-TPR and XPS analyses show that the acidity of catalyst decreases with the poisoning of arsenic.The chemical forms of W and Ti do not change with the interaction of arsenic,but the chemical form of V changes greatly.So the poisoning of the catalyst is attributed to the changing of chemical form of V and the decreasing of acidity of the catalyst.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2011年第11期856-859,共4页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(50976050
51176077)
国家自然科学基金外国青年基金(51150110155)
