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FCC Gasoline Upgrading over Modified Nanoscale HZSM-5 Catalyst

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Abstract:

Nanoscale HZSM-5 zeolite was hydrothermally treated with ammonia water at 773K and then loaded with La2O3, NiO and MoO3. The parent and modified nanoscale HZSM-5 zeolite catalysts were characterized by XRD, NH3-TPD, Py-FTIR and N2 adsorption. The characterization results indicated that the acid strength of the parent nanoscale HZSM-5 was weakened, the L/B acidity increased notably and the metal species were well dispersed on the surface of the supports after the combined-modification measurement. In the presence of hydrogen, the performance of the modified HZSM-5 catalyst for FCC gasoline upgrading was evaluated in a fixed bed reactor. Under the given reaction conditions, the average olefin content in FCC gasoline was decreased from 33.2 vol% to 11.3 vol% within 300 h time on stream; the aromatic and isoparaffin contents in the product were increased from 29.8 vol% and 25.9 vol% to 39.0 vol% and 35.4 vol%, respectively. The modified nanoscale HZSM-5 catalyst reduced sulfur concentration in FCC gasoline by about 90% without gasoline octane number loss.

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Periodical:

Advanced Materials Research (Volume 1119)

Pages:

58-65

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1119.58

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Online since:

July 2015

Authors:

Xiao Bo Zhao*

Keywords:

FCC Gasoline, Nanoscale HZSM-5, Olefin, Ron, Sulfur

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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