Marvin laser particle size analyzer with wet dispersion unit was used to test the particle size of Y zeolite powder.The effects of sample addition mode,ultrasonic time,refractive index,absorption rate,rotational speed and shading degree on the par-ticle size were investigated.The results showed that the optimal testing conditions for the particle size of Y zeolite powder were:pre-dispersion sampling method,ultrasonic power of 40 W,ultrasonic treat-ment time of 60 s,injector speed of 2 500 r/min,sample opacity of 8％-15％,refractive index of 1.46,and absorption index of 0.001.After 5 repeated determinations,the maximum relative standard de-viation of D10,D50,andD90(when the cumulative par-ticle size distribution percentage of the sample was 10％,50％,90％,the corresponding particle size in turn)was 6.275％,and the maximum weighted residual value was 0.429.
关键词
激光粒度仪/Y型分子筛/粒径分布/粒度/加权残差/相对标准偏差
Key words
laser grainsize analyzer/Y zeolite/particle size distribution/particle size/weighted residual/relative standard deviation
维普
万方数据