Catalytic cracking of heavy naphtha-range hydrocarbons over different zeolites structures

Abdallah A. Al-Shammari; Syed A. Ali; Nabil Al-Yassir; Abdullah M. Aitani; Kehinde E. Ogunronbi; Khalid A. Al-Majnouni; Sulaiman S. Al-Khattaf

doi:10.1016/j.fuproc.2014.01.021

Catalytic cracking of heavy naphtha-range hydrocarbons over different zeolites structures

Abdallah A. Al-Shammari, Syed A. Ali, Nabil Al-Yassir, Abdullah M. Aitani, Kehinde E. Ogunronbi, Khalid A. Al-Majnouni, Sulaiman S. Al-Khattaf^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

The effects of textural, structural, morpholgical, and acidic properties of HZSM-5, H-mordenite and (MFI/MOR) composite zeolite on the catalytic cracking of heavy naphtha-range hydrocarbons (dodecane, iso-octane, and ethylbenzene) as well as heavy naphtha were studied. XRD and SEM results revealed the presence of (MFI/MOR) overgrowth composite zeolite upon recrystallization of H-mordenite in the presence of tetrapropylammonium bromide. Significant cracking of dodecane occurred over different zeolites, however, very low cracking of iso-octane was observed over HZSM-5. The conversion of ethylbenzene, iso-octane and dodecane at 400 C was 69.6, 74.5 and 86.4 wt.%, respectively, over H-mordenite, compared with 69.8, 11.2 and 83.8 wt.%, respectively, over HZSM-5. (MFI/MOR) overgrowth zeolite exhibited an intermediate level of cracking. Catalytic cracking of hydrocarbon mixtures followed similar trends as those for pure model compounds. Catalytic cracking of heavy naphtha was higher over HZSM-5, compared to H-mordenite (94.4 wt.% vs. 76.5 wt.%). The kinetic modeling studies indicated that the rate of hydrocarbon cracking varies with the nature of model compounds and zeolite structure. The apparent activation energies (E_a) for the three model compounds increased in the following order; HZSM-5 > (MFI/MOR) > H-mordenite, whereas the difference in E_a over various zeolites was much larger for iso-octane and ethylbenzene.

Original language	English
Pages (from-to)	12-22
Number of pages	11
Journal	Fuel Processing Technology
Volume	122
DOIs	https://doi.org/10.1016/j.fuproc.2014.01.021
State	Published - Jun 2014

Bibliographical note

Funding Information:
The authors wish to acknowledge the support of the Research Institute of King Fahd University of Petroleum and Minerals (KFUPM) . We also acknowledge the Ministry of Higher Education, Saudi Arabia for establishing the Center of Research Excellence in Petroleum Refining and Petrochemicals at KFUPM.

Keywords

(MFI/MOR) composite zeolite
Catalytic cracking
H-mordenite
HZSM-5
Heavy naphtha

ASJC Scopus subject areas

General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology

Access to Document

10.1016/j.fuproc.2014.01.021

Cite this

@article{360aceb149d54f7c9268d2f7d84a0182,

title = "Catalytic cracking of heavy naphtha-range hydrocarbons over different zeolites structures",

abstract = "The effects of textural, structural, morpholgical, and acidic properties of HZSM-5, H-mordenite and (MFI/MOR) composite zeolite on the catalytic cracking of heavy naphtha-range hydrocarbons (dodecane, iso-octane, and ethylbenzene) as well as heavy naphtha were studied. XRD and SEM results revealed the presence of (MFI/MOR) overgrowth composite zeolite upon recrystallization of H-mordenite in the presence of tetrapropylammonium bromide. Significant cracking of dodecane occurred over different zeolites, however, very low cracking of iso-octane was observed over HZSM-5. The conversion of ethylbenzene, iso-octane and dodecane at 400 C was 69.6, 74.5 and 86.4 wt.\%, respectively, over H-mordenite, compared with 69.8, 11.2 and 83.8 wt.\%, respectively, over HZSM-5. (MFI/MOR) overgrowth zeolite exhibited an intermediate level of cracking. Catalytic cracking of hydrocarbon mixtures followed similar trends as those for pure model compounds. Catalytic cracking of heavy naphtha was higher over HZSM-5, compared to H-mordenite (94.4 wt.\% vs. 76.5 wt.\%). The kinetic modeling studies indicated that the rate of hydrocarbon cracking varies with the nature of model compounds and zeolite structure. The apparent activation energies (Ea) for the three model compounds increased in the following order; HZSM-5 > (MFI/MOR) > H-mordenite, whereas the difference in Ea over various zeolites was much larger for iso-octane and ethylbenzene.",

keywords = "(MFI/MOR) composite zeolite, Catalytic cracking, H-mordenite, HZSM-5, Heavy naphtha",

author = "Al-Shammari, \{Abdallah A.\} and Ali, \{Syed A.\} and Nabil Al-Yassir and Aitani, \{Abdullah M.\} and Ogunronbi, \{Kehinde E.\} and Al-Majnouni, \{Khalid A.\} and Al-Khattaf, \{Sulaiman S.\}",

note = "Funding Information: The authors wish to acknowledge the support of the Research Institute of King Fahd University of Petroleum and Minerals (KFUPM) . We also acknowledge the Ministry of Higher Education, Saudi Arabia for establishing the Center of Research Excellence in Petroleum Refining and Petrochemicals at KFUPM. ",

year = "2014",

month = jun,

doi = "10.1016/j.fuproc.2014.01.021",

language = "English",

volume = "122",

pages = "12--22",

journal = "Fuel Processing Technology",

issn = "0378-3820",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Catalytic cracking of heavy naphtha-range hydrocarbons over different zeolites structures

AU - Al-Shammari, Abdallah A.

AU - Ali, Syed A.

AU - Al-Yassir, Nabil

AU - Aitani, Abdullah M.

AU - Ogunronbi, Kehinde E.

AU - Al-Majnouni, Khalid A.

AU - Al-Khattaf, Sulaiman S.

N1 - Funding Information: The authors wish to acknowledge the support of the Research Institute of King Fahd University of Petroleum and Minerals (KFUPM) . We also acknowledge the Ministry of Higher Education, Saudi Arabia for establishing the Center of Research Excellence in Petroleum Refining and Petrochemicals at KFUPM.

PY - 2014/6

Y1 - 2014/6

N2 - The effects of textural, structural, morpholgical, and acidic properties of HZSM-5, H-mordenite and (MFI/MOR) composite zeolite on the catalytic cracking of heavy naphtha-range hydrocarbons (dodecane, iso-octane, and ethylbenzene) as well as heavy naphtha were studied. XRD and SEM results revealed the presence of (MFI/MOR) overgrowth composite zeolite upon recrystallization of H-mordenite in the presence of tetrapropylammonium bromide. Significant cracking of dodecane occurred over different zeolites, however, very low cracking of iso-octane was observed over HZSM-5. The conversion of ethylbenzene, iso-octane and dodecane at 400 C was 69.6, 74.5 and 86.4 wt.%, respectively, over H-mordenite, compared with 69.8, 11.2 and 83.8 wt.%, respectively, over HZSM-5. (MFI/MOR) overgrowth zeolite exhibited an intermediate level of cracking. Catalytic cracking of hydrocarbon mixtures followed similar trends as those for pure model compounds. Catalytic cracking of heavy naphtha was higher over HZSM-5, compared to H-mordenite (94.4 wt.% vs. 76.5 wt.%). The kinetic modeling studies indicated that the rate of hydrocarbon cracking varies with the nature of model compounds and zeolite structure. The apparent activation energies (Ea) for the three model compounds increased in the following order; HZSM-5 > (MFI/MOR) > H-mordenite, whereas the difference in Ea over various zeolites was much larger for iso-octane and ethylbenzene.

AB - The effects of textural, structural, morpholgical, and acidic properties of HZSM-5, H-mordenite and (MFI/MOR) composite zeolite on the catalytic cracking of heavy naphtha-range hydrocarbons (dodecane, iso-octane, and ethylbenzene) as well as heavy naphtha were studied. XRD and SEM results revealed the presence of (MFI/MOR) overgrowth composite zeolite upon recrystallization of H-mordenite in the presence of tetrapropylammonium bromide. Significant cracking of dodecane occurred over different zeolites, however, very low cracking of iso-octane was observed over HZSM-5. The conversion of ethylbenzene, iso-octane and dodecane at 400 C was 69.6, 74.5 and 86.4 wt.%, respectively, over H-mordenite, compared with 69.8, 11.2 and 83.8 wt.%, respectively, over HZSM-5. (MFI/MOR) overgrowth zeolite exhibited an intermediate level of cracking. Catalytic cracking of hydrocarbon mixtures followed similar trends as those for pure model compounds. Catalytic cracking of heavy naphtha was higher over HZSM-5, compared to H-mordenite (94.4 wt.% vs. 76.5 wt.%). The kinetic modeling studies indicated that the rate of hydrocarbon cracking varies with the nature of model compounds and zeolite structure. The apparent activation energies (Ea) for the three model compounds increased in the following order; HZSM-5 > (MFI/MOR) > H-mordenite, whereas the difference in Ea over various zeolites was much larger for iso-octane and ethylbenzene.

KW - (MFI/MOR) composite zeolite

KW - Catalytic cracking

KW - H-mordenite

KW - HZSM-5

KW - Heavy naphtha

UR - https://www.scopus.com/pages/publications/84893745821

U2 - 10.1016/j.fuproc.2014.01.021

DO - 10.1016/j.fuproc.2014.01.021

M3 - Article

AN - SCOPUS:84893745821

SN - 0378-3820

VL - 122

SP - 12

EP - 22

JO - Fuel Processing Technology

JF - Fuel Processing Technology

ER -

Catalytic cracking of heavy naphtha-range hydrocarbons over different zeolites structures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this