In order to evaluate the performance of on-line particles test equipment at high temperature

an optical on-line particle size analyzer was used to test catalyst particles concentration and particle size distribution(PSD)downstream of a fluid catalytic cracking(FCC)flue gas filtration test facility.At the same time

an off-line sampling system tested catalyst particles concentration both upstream and downstream of the facility.Catalyst PSD and microstructure were measured with Coulter counter particle size analyzer and scanning electron microscopy(SEM).The off-line test results agreed well with the results of on-line particle size analyzer.Experimental results showed that the on-line test equipment had high accuracy when operating pressure was 0.21 MPa and operating temperature ranged from 320℃ to 465℃.Experimental and simulation results showed that operating temperature almost had no influence on test measurement.On this basis

aiming at real condition of coal chemical industry

an iterated method was developed to correct on-line measurement results

which could provide a guideline to determine the particulate matter in high temperature pipeline in coal chemical industry.