Recent progress on low-temperature selective catalytic reduction of NOx by NH3 based on MOF-derived materials: a
Zuo-Lin Cui1, Rui-Tang Guo1,2, Jiong-Ran Lv1
1College of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, People's Republic of China. grta@sohu.com.
Abstract:
Selective catalytic reduction of nitrogen oxides (NOx) using ammonia (NH3) is an effective method to reduce NOx emissions from stationary and mobile sources. In this paper, the research progress of metal-organic framework (MOF) derivatives in NH3-Selective Catalytic Reduction (SCR) reactions in recent years is summarized, focusing on three major aspects, namely, the synthesis of MOF derivatives, the reaction mechanism, and the application of MOF derivatives in NH3-SCR reactions. In terms of the synthesis of MOF derivatives, various synthesis methods to improve the MOF materials and thus the performance of SCR reactions are systematically reviewed. In the context of reaction mechanisms, this review examines the designed and modified MOF derivatives to enhance the catalytic activity, adsorption capacity, and tolerance of the NH3-SCR process. Furthermore, this review provides a comparative analysis of the catalytic efficiency and poison resistance of metallic, carbon-based, and composite derivatives, with particular emphasis on their deNOx performance, anti-toxicity characteristics, and thermal stability. Finally, the future development potential and directions of MOF derivative catalysts in NH3-SCR reactions are explored.
Related Concept Videos
Preparation of Amines: Reduction of Oximes and Nitro Compounds
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
Preparation of Amines: Reduction of Amides and Nitriles
Amides can be reduced to primary, secondary, and tertiary amines using catalytic hydrogenation, active metals like Fe,...
Preparation of Amines: Reductive Amination of Aldehydes and Ketones
Nitriles to Amines: LiAlH4 Reduction
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
Reduction of Alkynes to trans-Alkenes: Sodium in Liquid Ammonia
When dissolved in liquid ammonia, an alkali metal, such as sodium,...
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.


