毕业设计-选择性催化还原氮氧化物的研究进展.doc

目录
摘要 1
Abstract 2
前言 3
第一章氮氧化物的危害及产生 4
NOx危害和产生 4
4
NOX来源 4
5
第二章氨选择性催化还原(NH3-SCR)法 5
6
6
SCR催化反应原理 6
SCR催化反应的不足 7
C R催化剂 7
C R催化剂 8
8
8
炭基载体催化剂 9
9
10
第三章烃及尿素类 11
12
12
第四章选择性催化还原法发展和要求 14
14
14
14
15
16
17
结语 19
后记 20
参考文献 21
摘要
选择性催化还原法是脱除氮氧化物的最有效的方法,当前大多数工业和排放处理脱硝均采用这种技术。它包括:氮氧化物的危害及产生,氨选择性催化还原(NH3-SCR)法,烃及尿素类,选择性催化还原法现状和发展来讨论。在这里对低温下氨选择性催化还原(NH3-SCR)法和选择性催化还原法现状和发展着重分析。而低温选择性催化还原氮氧化物技术的核心在于选择高效的催化剂。因此开发具有低温活性的高效脱硝催化剂成为当前国内外的研究热点。文章对近年来选择性催化还原法脱除NOx的研究进展进行综述。
关键词:选择性催化还原;氮氧化物;催化剂
Abstract
The method of Selective catalytic reductione is the most effective way to deal with nitrogen oxid, the method of removal of NOx emissions are mostly used in industrial in the present. The paper reviews the hazards and produce of nitrogen oxides, the method of selective catalytic reduction with ammonia(NH3-SCR) and the method of selective catalytic reduction with hydrocarbons and urea, discusses the Situation and development of selective catalytic reduction . the method of the low temperature selective catalytic reduction with ammonia (NH3-SCR)has been focuse on. The core technology of the low-temperature selective catalytic reduction of nitrogen oxides is the option on effective catalyst. Therefore, the efficient development of a low-temperature DeNOx catalyst activity has e a research hotspot at domestic and abroad. This articles has researched the review of progress of selective catalytic reduction of NOx Removal in recent years.
Keywords: selective catalytic reduction; nitrogen oxides; catalyst
前言
大气中的NOx能引起酸雨、光化学烟雾、地表水富营养化等破坏生态环境并危及人健康的一系列问题。控制大气中NOx的排放引起了全球的关注,同时也是我国目前大气环境保护中的重点和难点。因此,对NOx的处理尤为重要。催化脱硝法中的选择性催化还原法(SCR)兼顾经济与效率,