A CONTINUOUS PROCESS FOR SEPARATION OF FISCHER-TROPSCH WAX FROM ULTRAFINE IRON NANO-CATALYST PARTICLES BY USING CROSS- FLOW FILTRATION MODULE

摘要

The concentration of iron present in the permeate wax was found to be consistently less than 35 ppm with over 85% below 16 pm level. Following an active flux maintenance technique results in short term recovery of flux which declines to base value within next 24 hours. The passive flux maintenance procedure of interrupting the permeate flow for 30 or 60 seconds per 30 minutes was effective in recovering the initial membrane fouling temporarily. Better flux stability was attained only after increasing the permeate off cycle to 1 hour per day in addition to 30 seconds off per half hour cycle. Variation of flux magnitude with TMP was found to follow a liner relationship within the range studied.