利用潮南区自动监测数据和在线单颗粒气溶胶质谱仪(SPAMS,Single Particle Aerosol Mass Spectrometer)分析潮南区细颗粒物污染特征,追溯潮南区的细颗粒物污染的主要来源。结果表明:潮南区细颗粒物污染多发生在冬春两季,主要是1、2和10...利用潮南区自动监测数据和在线单颗粒气溶胶质谱仪(SPAMS,Single Particle Aerosol Mass Spectrometer)分析潮南区细颗粒物污染特征,追溯潮南区的细颗粒物污染的主要来源。结果表明:潮南区细颗粒物污染多发生在冬春两季,主要是1、2和10月,主要来源于北向和西南向的工业生产源。污染过程主要是由于气象扩散条件不利,燃煤源颗粒富集过多导致,建议在重污染天气时优先考虑加强对该方向燃煤和工业工艺源采取管控措施。展开更多
Efficiency and selectivity of hydrogenating depolymerization of the coal extract benzene-insoluble part over the heterogeneous Co–Mo/Al2O3 catalyst were assessed using a mathematical model. The analytical equations o...Efficiency and selectivity of hydrogenating depolymerization of the coal extract benzene-insoluble part over the heterogeneous Co–Mo/Al2O3 catalyst were assessed using a mathematical model. The analytical equations of the mathematical model were generated based on material balance incorporating the physico-chemical phenomena(reaction and diffusion) both in the autoclave and the catalyst grain. The equations offer the possibility for predicting changes of the reactants in the autoclave during the process and for determining the distribution of reactant concentrations in the grain as a function of its radius. The analytical equations of the model serve as the basis of the algorithm for assessing the influence of restrictive diffusion on the effectiveness and selectivity of the catalyst, and also for defining the optimal radii of the catalyst's pores to enable free transport of reactants in the grain interior.展开更多
文摘利用潮南区自动监测数据和在线单颗粒气溶胶质谱仪(SPAMS,Single Particle Aerosol Mass Spectrometer)分析潮南区细颗粒物污染特征,追溯潮南区的细颗粒物污染的主要来源。结果表明:潮南区细颗粒物污染多发生在冬春两季,主要是1、2和10月,主要来源于北向和西南向的工业生产源。污染过程主要是由于气象扩散条件不利,燃煤源颗粒富集过多导致,建议在重污染天气时优先考虑加强对该方向燃煤和工业工艺源采取管控措施。
文摘Efficiency and selectivity of hydrogenating depolymerization of the coal extract benzene-insoluble part over the heterogeneous Co–Mo/Al2O3 catalyst were assessed using a mathematical model. The analytical equations of the mathematical model were generated based on material balance incorporating the physico-chemical phenomena(reaction and diffusion) both in the autoclave and the catalyst grain. The equations offer the possibility for predicting changes of the reactants in the autoclave during the process and for determining the distribution of reactant concentrations in the grain as a function of its radius. The analytical equations of the model serve as the basis of the algorithm for assessing the influence of restrictive diffusion on the effectiveness and selectivity of the catalyst, and also for defining the optimal radii of the catalyst's pores to enable free transport of reactants in the grain interior.
