TY - JOUR
T1 - Fe-Substituted Pt/HZSM-48 for Superior Selectivity of i-C12 in n-Dodecane Hydroisomerization
AU - Shang, Shujie
AU - Li, Wenhui
AU - Zhou, Ajuan
AU - Zhang, Jiaxing
AU - Yang, Hong
AU - Zhang, Anfeng
AU - Guo, Xinwen
PY - 2022/1/19
Y1 - 2022/1/19
N2 - A series of Fe-substituted ZSM-48 catalysts including Fe-free HZ48 and partially and fully Fe-substituted HZ48-x (x = Al/Fe = 9, 5, 1, and 0) is synthesized via an in situ seed-induced hydrothermal process with the aim to improve the iso-selectivity of long-chain n-alkane hydroisomerization. X-ray powder diffraction, UV–vis, UV-Raman, and X-ray photoelectron spectroscopy analyses confirm that Fe3+ species are effectively incorporated into the *MRE framework. NH3-TPD and Py-IR show that not only the strength of strong acid reduces with the increased Fe-substitution, the total Brønsted acidity also decreases. To support hydroisomerization of n-C12, Pt is loaded to the HZ48 and HZ48-x supports. The reaction testing shows that the Fe-substitution consistently increases the isomer yield than the Fe-free Pt/HZ48. The partially Fe-substituted Pt/HZ48-5 delivers the highest isomer yield of 78.9% i-C12, a 15.7% increase compared to the Fe-free Pt/HZ48 catalyst. The iso-selectivity achieved also shows a strong positive correlation with the BW+M% of the catalysts.
AB - A series of Fe-substituted ZSM-48 catalysts including Fe-free HZ48 and partially and fully Fe-substituted HZ48-x (x = Al/Fe = 9, 5, 1, and 0) is synthesized via an in situ seed-induced hydrothermal process with the aim to improve the iso-selectivity of long-chain n-alkane hydroisomerization. X-ray powder diffraction, UV–vis, UV-Raman, and X-ray photoelectron spectroscopy analyses confirm that Fe3+ species are effectively incorporated into the *MRE framework. NH3-TPD and Py-IR show that not only the strength of strong acid reduces with the increased Fe-substitution, the total Brønsted acidity also decreases. To support hydroisomerization of n-C12, Pt is loaded to the HZ48 and HZ48-x supports. The reaction testing shows that the Fe-substitution consistently increases the isomer yield than the Fe-free Pt/HZ48. The partially Fe-substituted Pt/HZ48-5 delivers the highest isomer yield of 78.9% i-C12, a 15.7% increase compared to the Fe-free Pt/HZ48 catalyst. The iso-selectivity achieved also shows a strong positive correlation with the BW+M% of the catalysts.
UR - http://www.scopus.com/inward/record.url?scp=85123305774&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.1c04091
DO - 10.1021/acs.iecr.1c04091
M3 - Article
AN - SCOPUS:85123305774
SN - 0888-5885
VL - 61
SP - 1056
EP - 1065
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 2
ER -