Catalytic NO reduction

W. Held and co-workers. Catalytic NO Reduction in Net Oxidi ng Exhaust Gas, SAE 900496, Society of Automotive Engineers, Warrendale, Pa., 1990. 

Here we describe an EP study of catalytic NO reduction by CO and by propene over Pt/P alumina. The latter process is especially significant for the removal of NO in oxidising environments, a key problem that must be overcome for pollution abatement from lean-bum gasoline engines. 

The rate of catalytic "NO" reduction by hydrogen and carbon monoxide over a char surface was measured and compared with the rate of noncatalytic "NO" reduction by char which has been previously reported to have a significant effect on "NO" emission control in a fluidized bed combustor of coal. 

Figure 2. Rate of NO reduction by char and catalytic NO reduction by hydrogen and CO over char surface. The a denotes the ratio of CO/H, concentration to...

R. Samson, F. Goudna, O Maaskant, T. Gilmore, The design and installation of a low-temperature catalytic NO, reduction system for fired heaters and boilers. Proceedings Fall International Symposium of the American Flame Research Committee, San Francisco, Calif., October 8-10, 1990. 

R. Samson, F. Goudriaan, O. Maaskant, and T. Gilmore, The Design and Installation of a Low-Temperature Catalytic NO Reduction System for Fired Heaters and Boilers, paper presented at the 1990 Fall Int. Symposium of the American Rame Research Committee, Oct. 8-10 1990, San Francisco, Calif. 

The conversion of fuel nitrogen to NO, presents a problem when biomass or waste with a high nitrogen content is used as a fuel. This is a common problem for both conventional boiler plants and IGCC plants, In boilers, NO, reduction can be achieved by primary measures, eg, fuel staging or by selective non catalytic NO, reduction (SNCR) with ammonia injection in the boiler, or selective catalytic NO, reduction (SCR) with ammonia injected in the flue gas duct after the boiler. 

A hydroxylamine sulfate solution is prepared in the catalytic NO reduction unit for reaction with the cyclohexanone. A block flow diagram of this part of the process is shown in Figure 23 [33]. 

ZeUner A, Suntz R, Deutschmann O In situ investigations of catalytic NO reduction inside an optically accessible flow reactor, Chem Ing Tech 86 538-543, 2014. 

Jacob E (1990) Process and device for selective catalytic NO reduction in exhaust gases containing oxygen. EP487,886... 

Hsu LY, Teng H (2001) Catalytic NO reduction with NH3 over carbons modified by acid oxidation and by metal impregnation and its kinetic studies. Appl. CataL B. 35 21-30... 

The flue gas produced in the boiler of a power plant is passed to the SCR reactor together with ammonia as reducing agent (Figure 6.18.11). The main reactions of catalytic NO, reduction are described by ... 

Table 6.18.7 gives material properties, kinetic parameters, and typical reaction conditions of catalytic NO reduction with ammonia on a monolithic Ti-V-W catalyst. 

Hurst, B. E., and White C. M., 1986, THERMAL DeNO, A Commercial Selective Non-Catalytic NO, Reduction Process for Waste-to-Energy Applications, paper presented at the ASME 12th Biennial National Waste Processing Conference, Denver, CO, June 2. 

A catalytic NO reduction was effected by the anionic complex [RhCl2(CO)2] using H2O, HCl and ethanol [90, 92). An 0 isotopic-Iabehng experiment indicated that one of the O-atoms in the CO2 product is derived from the water in the reaction medium and not directly from the NO reactant [97]. 

Fig. 9.8 Comparison between experimental data and model simulations for N20/Ar step responses over Rh/Al203. (From K. Rahkamaa-Tolonen, Investigation of catalytic NO reduction with transient techniques, isotopic exchange and FT-IR spectroscopy (Ph.D. Thesis), Abo Akademi University, 2001).

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