RESEARCH ON COKING DEACTIVATION OF MTP CATALYST IN SIDE-LINE TEST

Abstract

Abstract: Coke deposition over MFI-based MTP catalyst is determining factor on CO₂ emission and energy consumption of the MTP plant. RZMP-101 catalyst and the reference catalyst were parallelly evaluated on the MTP side-line test unit. The results showed that RZMP-101 catalyst possessed longer one-pass lifespan and higher propylene yield/selectivity. The deactivated catalyst sampled from the fourth catalyst bed was characterized. The results illustrated that the deactivated RZMP-101 catalyst had lower coke deposition, indicating lower coking rate during MTP reaction, which would benefit CO₂ emission reduction and energy consumption of MTP plant. The hard coke excessively deposited within mesopores of deactivated catalysts led to the loss of acidity, blockage of inner pore system and damage of extruded cylindrical shape.

Key words: MTP catalyst, one-pass lifespan, coke deposition, methanol, dimethylether, proplyene

References

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