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The Cu2O supported by active carbon (Cu2O/AC) was prepared by impregnation with different concentrations of CuSO4 and Na2SO3 in HAc-NaAc buffer solution. The addition of a few C6H12O6 (glucose) in reaction favored of improving the quality of the cuprous oxide. The sample was characterized by chemistry analysis, SEM, XRD and so on. The results showed that the cuprous oxide was of pure phase and radial spherical morphology. The photocatalytic activity of prepared catalysts was investigated for degradation of organic dyes. The degradation efficiency was up to 95% under the optimized experimental conditions.

To provide a theoretical guidance for the application of selective non-catalytic reduction (SNCR) in a large capacity utility boiler, numerical study of SNCR process in a 600 MW utility boiler was performed based on computational fluid dynamics (CFD) code Fluent. Good agreement of the calculation results with the industrial test data confirms the reliability of the calculation model. It is found that the NO removal efficiency is low and NH3-slip is high, because the injected reducing agent could not mix with the flue gas adequately, and the furnace temperature is not uniform in utility boiler with large furnace size. Aiming at this problem, the commissioning scheme for reducing agent injection system was optimized, and CO was added together with the reducing agent. As a result, NO removal efficiency increases from 19% to 27%, and NH3-slip decreases from 59 ppm to 13 ppm.