负载复合金属催化剂的活性半焦脱除烟气中NO的非等温动力学研究
发布时间：2018-09-06 17:21
【摘要】：对负载复合金属催化剂的活性半焦脱除烟气中NO进行了非等温动力学研究,并对其反应机制进行了探讨.使用热重分析仪进行程序升温脱硝实验,采用Flynn-Wall-Ozawa(FWO),Kissinger-Akahira-Sunose(KAS)和Coats-Redfen(CR)非等温动力学方法,计算纯活性半焦和负载金属催化剂的活性半焦脱硝的表观活化能.使用X射线衍射仪(XRD)对催化剂脱硝前后的金属活性相进行了分析.结果表明:在活性半焦上负载铜铁复合金属催化剂后,降低了脱硝反应的表观活化能、反应所需温度和反应能耗;当活性半焦的碳转化率≤0.3时,脱硝过程主要由化学反应控制,当碳转化率0.3时,脱硝过程转向扩散控制为主;通过XRD结果分析可知,金属催化剂的低价态活性相具有较高的催化活性,随着脱硝反应的进行,金属活性相被氧化成为活性较低的高价态;复合金属氧化物铁酸铜能在反应过程中分解成为活性更高的金属活性相,提高了脱硝性能.
[Abstract]:The non-isothermal kinetics of activated semi-coke removal of NO from flue gas by supported composite metal catalyst was studied and the reaction mechanism was discussed. The temperature programmed denitrification experiment was carried out by thermogravimetric analyzer. The apparent activation energy of denitrification of pure active char and supported metal catalyst was calculated by Flynn-Wall-Ozawa (FWO) Kissinger-Akahira-Sunose (KAS) and Coats-Redfen (CR) non-isothermal kinetic method. The active phase of the catalyst before and after denitrification was analyzed by X-ray diffractometer (XRD). The results show that the apparent activation energy of denitrification is reduced, the reaction temperature and energy consumption are reduced, and the carbon conversion of activated char is 鈮，
本文编号：2227028
[Abstract]:The non-isothermal kinetics of activated semi-coke removal of NO from flue gas by supported composite metal catalyst was studied and the reaction mechanism was discussed. The temperature programmed denitrification experiment was carried out by thermogravimetric analyzer. The apparent activation energy of denitrification of pure active char and supported metal catalyst was calculated by Flynn-Wall-Ozawa (FWO) Kissinger-Akahira-Sunose (KAS) and Coats-Redfen (CR) non-isothermal kinetic method. The active phase of the catalyst before and after denitrification was analyzed by X-ray diffractometer (XRD). The results show that the apparent activation energy of denitrification is reduced, the reaction temperature and energy consumption are reduced, and the carbon conversion of activated char is 鈮，
本文编号：2227028
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