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Acidic catalytic cracking catalyst modulation and hydrogen ion exchange research

Author: SuQiong
Tutor: LuShanXiang
School: East China University of Science and Technology
Course: Chemical Engineering
Keywords: Catalytic cracking NaY zeolite Acidity Na2O content Micro- anti - activity of
CLC: TE624.41
Type: Master's thesis
Year: 2011
Downloads: 127
Quote: 0
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Abstract


For situ crystallization the NaY molecular sieve and , research the acidity of the catalyst tune by the of different substances modified for the FCC Unit varying Regularity of . Test results show that the the introduction of would make of the rare earth is a the B the amount of acid of of the NaY molecular sieve and an increase in , L The the amount of acid is changes in is not obvious ; the introduction of of the phosphorus will make the B acid a substantial increase in , L acid slightly a decrease in ; the the introduction of of a small amount of magnesium will make decline in B acid increase in , L acid , but the total the amount of acid little change in . This paper also studied the the situ crystallization NaY molecular sieve and of the hydrogen ion-exchange , and with the ammonium salt exchange method carried out compared . The test results show that the , the the micro- of the a hydrogen the ion-exchanged product On anti- activity ( 100-percent- water steam , , 800 ° C , for the with 52.62% in 17h ) , and is while the ammonium salts exchange On product was for the 62.34% . Adopt time water An thermal ultra-stable in order to improve by the the process of the For a hydrogen the ion-exchanged product the Hydrothermal Stability . After the the hydrogen ion-exchange product was purified by the conventional a 100% water heat ultra-stable after the , micro- anti- a activity of of 52.24% ; hydrogen ion-exchange product of first by the the ammonia water soak for re - water thermal ultra-stable , the its micro- anti- activity of 57.59% ; ammonia gas and water is mixed with steam the atmosphere ultra- the activity of of the steady Treating the ground states of hydrogen ion-exchange product in of the micro - anti- for the 55.49% . The test results show that the , the the existence of the ammonia gas the atmosphere that can be improved the Molecular Sieves of the the the Hydrothermal Stability .

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Catalytic converter > Catalytic cracking
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