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Carbon-coated TiO2 (C-TiO2) was synthesized by nano-anatase powders and absolute alcohol with chemical vapor deposition method in nitrogen (N2) atmosphere. The CuOx/C-TiO2 composite was prepared as a catalyst for the selective catalytic oxidation (SCO) of ammonia (NH3) and demonstrated both high catalytic activity and low NO yield. Microstructures and properties of these materials were characterized...
The influences of CeO2 and La2O3 on catalytic wet air oxidation of PH3 was investigated. CuO catalysts, CuO-CeO2 catalysts and CuO-La2O3 catalysts were prepared using the co-precipitation method. Results revealed that the purification efficiency of PH3 removed by the combination of Ce and Cu oxide was good. The catalystic activity of CuO-CeO2 catalysts influenced by the ratio of Cu to Ce was studied,...
Four different transition catalysts (V, Cr, Zn, Mo) supported on TiO2 were prepared by incipient impregnation and their performances of selective catalytic oxidation (SCO) of ammonia(NH3) were investigated in mixed gas in which 500ppm ammonia was included and the gas hourly space velocity(GHSV) was 35385h-1. The results shown that 99% ammonia removal efficiency, 19% nitric oxide (NO) conversion and...
Selective catalytic oxidation (SCO) of ammonia to nitrogen is a promising approach for dealing with the main fixed nitrogen species. Corresponding nitrates of Fe, Cu, Ni, Co and Mn transition metals supported on TiO2 were prepared with incipient wetness impregnation and have been tested in the low temperature range from 50??C to 350 V. The catalysts were investigated under 500 ppm NH3, 2.5% O2, and...
Cu absorption solution was investigated for purifying PH3, CuSO4, CuCl2, Cu(NO3)2 and Cu(CH3COO)2 supply Cu2+ for Cu2+ absorption solution in experiments. CuSO4 solution showed the highest PH3 purification efficiency under the condition of 50??C, 200 mL/min and O2 2%, the PH3 concentration in exit gas streams was 0 ppm before 250 min. Main influence factors for reaction temperature, gas flow rate,...
We discuss how to apply the LPT algorithm to find the database server number and the middle-tier application server number in order to reduce costs. The three tier C/S model is formed when we insert a middle-tier between the client and server named the application server.
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