HZSM-5 Zeolite As Catalyst Additive for Residue Cracking under FCC Conditions

Arandes, José M.; Torre, Iker; Azkoiti, Miren J.; Ereña, Javier; Olazar, Martı́n; Bilbao, Javier

doi:10.1021/ef9002632

Cited by 34 publications

(17 citation statements)

References 42 publications

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“…The optimum catalyst system will maximize both propylene selectivity and gasoline olefinicity, while minimizing hydrogen transfer, isomerization, oligomerization and aromatization reactions. For the purpose of producing more propylene and olefins, more ZSM-5 is being used as the main active component of the catalyst in the FCC unit [2,11,19,33,108].…”

Section: Zsm-5 Additive For Olefin Production a Effect Of Zsm-5 Amountmentioning

confidence: 99%

Maximizing propylene production via FCC technology

2015

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This review looks at the main processes available for the production of light olefins with a focus on maximizing the production of propylene. Maximization of propylene production has become the focus of most refineries because it is in high demand and there is a supply shortage from modern steam crackers, which now produce relatively less propylene. The flexibility of the fluid catalytic cracking (FCC) to various reaction conditions makes it possible as one of the means to close the gap between supply and demand. The appropriate modification of the FCC process is accomplished by the synergistic integration of the catalyst, temperature, reaction-residence time, coke make, and hydrocarbon partial pressure. The main constraints for maximum propylene yield are based on having a suitable catalyst, suitable reactor configuration and reaction conditions.

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Section: Zsm-5 Additive For Olefin Production a Effect Of Zsm-5 Amountmentioning

confidence: 99%

Maximizing propylene production via FCC technology

2015

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“…The FCC is one of the most catalytic cracking technologies used widely in refinery for producing gasoline and diesel. However, current direction is to maximize olefins such as propylene and butylene by the addition of ZSM-5 to the catalyst formulation [4][5][6][7][8][9][10][11][12][13][14]. ZSM-5 shows high catalytic activity for the cracking of C 7…”

Section: Introductionmentioning

confidence: 99%

Reactivity of naphtha fractions for light olefins production

et al. 2016

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The catalytic cracking of naphtha fractions for propylene production was investigated under high severity catalytic cracking conditions (high temperatures and high catalyst to oil ratio). Straight run naphtha and cracked naphtha along with a with proprietary catalyst were used, and reaction was carried out using a catalyst to oil ratio (C/ O) of 3-6 at 600-650°C and 1 atm in a micro activity testing (MAT) unit. The results from this experiments show that light cracked naphtha (LCN) gave the highest propylene yield of 18% at 650°C, and that propylene yield depends on the naphtha fraction being used as feed. The trend for reactivity and propylene yield was as follows: light cracked naphtha [ heavy straight run naphtha [ light straight run naphtha [ heavy cracked naphtha.

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“…Incorporating active components such as phosphorus and metals in the additive formulation that aid in the conversion of heavier molecules and optimization of additive formulations with high ZSM-5 levels, are some of the approaches for overcoming the loss in activity of FCC catalyst systems [4][5][6][7][8][9]. The utilization of other types of zeolites as FCC additives such as MCM-22 [10], ITQ [11], beta [12,13], mordenite [13], MCM-68 [14] and bi-functional ZSM-5/MgAl 2 O 4 -based additive [15] were discussed in other papers.…”

Section: Introductionmentioning

confidence: 99%

Utilization of ZSM-5/MCM-41 composite as FCC catalyst additive for enhancing propylene yield from VGO cracking

et al. 2011

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A micro-mesoporous ZSM-5/MCM-41 composite molecular sieve (ZM13) was synthesized and tested as an FCC catalyst additive to enhance the yield of propylene from catalytic cracking of vacuum gas oil (VGO). The catalytic performance of the additive was assessed using a commercial equilibrium USY FCC catalyst (E-Cat) in a fixed-bed micro-activity test unit (MAT) at 520°C and various catalyst/oil ratios. MCM-41, ZSM-5 and two ZSM-5/MCM-41 composites were systematically characterized by complementary techniques such as XRD, BET, FTIR and SEM. The characterization results showed that the composites contained secondary building unit with different textural properties compared to pure ZSM-5 and MCM-41. MAT results showed that the VGO cracking activity of E-Cat did not decrease by using these additives. The highest propylene yield of 12.2 wt% was achieved over steamed ZSM-5/MCM-41 composite additive (ZM13) compared with 8.6 wt% over conventional ZSM-5 additive at similar gasoline yield penalty. The enhanced production of propylene over composite additive was attributed to its mesopores that suppressed secondary and hydrogen transfer reactions and offered easier transport and accessibility to active sites. Gasoline quality was improved by the use of all additives except MCM-41, as octane rating increased by 6-12 numbers.

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HZSM-5 Zeolite As Catalyst Additive for Residue Cracking under FCC Conditions

Cited by 34 publications

References 42 publications

Maximizing propylene production via FCC technology

Maximizing propylene production via FCC technology

Reactivity of naphtha fractions for light olefins production

Utilization of ZSM-5/MCM-41 composite as FCC catalyst additive for enhancing propylene yield from VGO cracking

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