文章信息/Info

Title:

Research Progress on Catalytic Materials for Selective Catalytic Reduction of Nitrogen Oxides

文章編號:

16743962(2019)12112510

作者:

沈岳松; 祝社民; 沈曉冬

(南京工業大學材料科學與工程學院，江蘇 南京 211816）

Author(s):

SHEN Yuesong;  ZHU Shemin;  SHEN Xiaodong

(College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China)

關鍵詞:

脫硝; 選擇性催化還原; 釩基脫硝催化劑; 稀土基脫硝催化劑; 鈰基復合氧化物; 船舶脫硝; 脫硝新挑戰

Keywords:

deNOx;  selective catalytic reduction;  vanadium�瞓ased deNOx catalyst;  rare earth�瞓ased deNOx catalyst;  cerium�瞓ased complex oxides;  ship deNOx;  deNOx new challenge

分類號:

TQ426

DOI:

10.7502/j.issn.16743962.201904024

文獻標志碼:

A

摘要:

氮氧化物（NOx）是大氣污染長久治理的重點，工業主流氨氣選擇性催化還原NOx的技術核心是脫硝催化劑，研發環境友好型高效脫硝催化劑是世界環保的共同需求。簡述了脫硝需求背景、脫硝催化劑應用現狀及現存問題，概述了貴金屬、金屬氧化物及離子交換型分子篩3大類脫硝催化劑的研究進展；重點論述了環境友好型稀土基脫硝催化劑的研發歷程，以及船用無毒選擇性催化還原（SCR）脫硝催化劑的研究進展。我國自主研發的稀土基脫硝催化劑是第二種實現規模化工業應用的煙氣脫硝催化劑，被國家三部委指定為釩基催化劑的替代產品，成為未來工業脫硝應用的重點新材料。從行業NOx超低排放驅動及惡劣工況脫硝難度兩方面，探討了脫硝催化劑面臨的新挑戰，指出抗水硫中毒能力強的超低溫催化劑、耐水熱穩定性強的高溫催化劑及脫硝催化劑多功能化治理其他污染物，是今后脫硝催化劑發展的重點。

Abstract:

Nitrogen oxides (NOx) are the long-term focus of air pollution control, the technological core of industrial mainstream selective catalytic reduction of NOx with ammonia is deNOx catalyst, and the research and development of environmentally friendly and highly efficient deNOx catalysts is a common requirement of the world’s environmental protection. The background of deNOx demand, the application status of deNOx catalysts and existing problems are briefly described, and the research progress of three types of deNOx catalysts, including noble metals, metal oxides and ion-exchanged zeolites are summarized. The development progress of the environmentally friendly rare earth-based deNOx catalysts and the research progress on non-toxic SCR catalysts for marine deNOx are highlighted. The rare earth-based deNOx catalyst independently developed by China is the second flue gas deNOx catalyst for large-scale industrial application, which has been designated as a substitute for the vanadium-based catalyst by the three state ministries and the national development and reform commission, and will become a key material for industrial deNOx applications in the future. From the two aspects of ultra-low NOx emission demand driven by different industries and the difficulty of deNOx in severe working conditions, the new challenges of deNOx catalysts are discussed. The ultra-low temperature deNOx catalysts with strong anti-water and sulfur dioxide poisoning abilities, the high temperature deNOx catalysts with high hydrothermal stability, and the new multi�瞗unctionalization of deNOx catalysts for treating other pollutants, are the focuses of future development.