催化还原法SCR低毒V2O5-WO3/TiO2脱硝催化剂的制备
本论文着手于钒钛催化剂，通过掺杂锰的氧化物来研究一种低毒的钒系催化剂。通过锰的氧化物来改良催化剂的反应温度和其抗中毒性能，同时控制钒的比重来达到低毒的目的。钒本身无毒，但是其金属氧化物对人体有巨大危害，所以锰的氧化物的比重控制可以减缓氧化钒在催化剂中的比重，从而降低催化剂在使用或者更替时对人体的危害，制备一种抗中毒能力优越的低毒SCR催化剂。
本文首先对制备方法进行了筛选。对溶胶一凝胶法、浸渍法和共沉淀法三种不同方法分析催化剂活性比较结果表明，浸渍法制备得到的催化剂更加容易得到，并且催化效果也并不落后于其他两种方法，因此在条件有限的情况下浸渍发更加适合。所以浸渍法是较为理想的低温SCR催化剂制备方法。
其次，针对上述浸渍法制备的催化剂，通过实验系统研究了低温SCR的优化操作条件，包括浸渍温度、焙烧温度和焙烧时间，从而获得氧化锰附着理想的钒系催化剂。
毕业论文关键词：钒系催化剂；氧化锰；低毒
Abstract Selective catalytic reduction method（SCR） catalyst for the removal of NOx by NH3 to selective Cui reduction of NOx removal technology, this method is the current industrial use of the more common, but also the most obvious effect。In the process of flue gas denitrification, SCR catalyst is the center, the preparation of SCR catalyst and the preparation process determine the efficiency of the whole process of denitrification and the cost of the high and low。And SCR catalyst is able to use cycle is the key to the cost of the girls, so a good SCR catalyst must be to have a good performance in anti poisoning。 But China's industrial use SCR catalyst generally power plant flue gas treatment, the wide variety of coal in China, seven of the group of some points for SCR catalyst has a irreversible effects。 As a result, the catalyst can not be reduced and inactivation。So the current research focuses on the anti poisoning performance of SCR catalyst。
This paper will proceed in vanadium catalyst, vanadium catalyst by doping manganese oxide on a low toxicity。 Through manganese oxides to improve the catalyst reaction temperature and its anti poisoning performance, while controlling the proportion of vanadium to achieve the purpose of low toxicity。Vanadium itself non-toxic, but the metal oxides on the human body have great harm, so the manganese oxide proportion control can slow down the proportion of vanadium oxide in the catalyst, thereby reducing catalyst in use or change to human body harm, preparation of a anti poisoning ability superior low SCR catalyst。
In this paper, the preparation method is selected。 The analysis of sol-gel method and impregnation method and co precipitation method, three different methods of catalyst activity comparison results show that the catalyst prepared by impregnation method to obtain and catalytic effect does not lag far behind in the other two methods, so under the condition of limited impregnated hair is more suitable。 So the impregnation method is an ideal method for the preparation of low temperature SCR catalyst。