SCR脱硝催化剂孔隙尺度格子Boltzmann数值模拟研究

孔隙率是选择性催化还原(SCR)脱硝催化剂结构的重要指标,对催化剂的脱硝效率有重要影响.根据工程依据范围创建微观孔隙尺度的SCR脱硝催化剂多孔介质模型,采用随机配置的方法,构造出8种不同孔隙率.采用格子Boltzmann方法模拟SCR催化剂表面流动及传质耦合化学反应过程,在特定烟气流速和NO原始浓度工况条件下获得多孔介...

Coal-fired Boiler SCR Denitration Catalyst Pore Scale Lattice Boltzmann Numerical Simulation

Porosity is the selective catalytic reduction(SCR) of denitration catalyst structure important indicators, the denitration efficiency has important influence to the catalyst.Created according to the scope of the project on the basis of microscopic pore scale SCR denitration catalyst porous medium model, adopt the method of random configuration,constructs the eight different holes. Lattice Boltzmann method was used to simulate SCR catalyst surface flow and mass transfer coupled chemical reaction process, In the specific working condition of flue gas velocity and concentration of NO original conditions,get the velocity distribution of gas flow in porous media and accompanied flow in catalytic reduction reaction of NO concentration distribution, study the influence of porosity on the flow and denitration efficiency.The results show that with the increase of the porosity, the whole average pore velocity decreases, export NO average concentration increased gradually, denitration rate gradually decreased;NO average concentration of outlet of the porosity of 0.748, the lowest and highest denitration efficiency, this porosity pore structure is the best.