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This article mainly concerns the performance and behavior and investigation of changes in activity and selectivity of Low Si/Al of ZSM-5 to find the best production distribution. The non-promoted catalyst to be compared with the promoted one was a Si/Al = 31.5 H-ZSM-5, tested previously. Wet Impregnation was made using Ultrasonic system combined by special pH control. The results showed how acid sites...