浅池型太阳能光催化反应动力学研究

研究了浅池型太阳能反应器中亚甲基蓝一级降解动力学常数与光辐射强度、反应器A/V值的关系 .当A/V与光照I均为变量时 ,提出了一个修正的动力学方程 :k =1 6 2 7× 10 -5I0 871(A/V) 1 3 57.同时 ,还建立了一个新的表观量子产率模型 :k =5 2 3CI0 871(A/V) 1 3 57.计算表观量子产率值为 0 17%— 0 30 % ,随着A/V、初始浓度的增大或光强的减小 ,表观量子产率增大

A study on kinetics of shallow pond solar photocatalytic reactor

The kinetic relationship between the first-order reaction rate constant k of methylene blue decolorization reaction and average radiant intensity I and also the aperture to volume ratio(A/V)in decolorization reaction and average radiant intensity I, and also the apeature to volume ratio (A/V) in the shallow pond solar photo-catalysis reactor was studied.While I and(A/V)are variables, a new kinetics equation is set up and expressed as follows:k =1.6 2 7× 10^-5I^0.871(A/V)^{1.3 57}.At meantime, another new model is built to calculate apparent quantum yield(ranges from 0.17% to 0.30%), and expressed as follows:k =5.2 3CI^0.871(A/V)^{1.3 57}.The apparent quantum yield increases with the increase of (A/V) and initial concentration or the decrease of I.This research will promote the industrialization of shallow pond solar photo-catalysis reactor.