Improvement of hydrothermal stability of Pt/SAPO-11 catalyst in hydrodeoxygenation-isomerization-aromatization of vegetable oil

Moshe Rabaev; Miron V. Landau; Roxana Vidruk-Nehemya; Amir Goldbourt; Moti Herskowitz

doi:10.1016/j.jcat.2015.10.005

Improvement of hydrothermal stability of Pt/SAPO-11 catalyst in hydrodeoxygenation-isomerization-aromatization of vegetable oil

Moshe Rabaev, Miron V. Landau, Roxana Vidruk-Nehemya, Amir Goldbourt, Moti Herskowitz

Tel Aviv University, Ben-Gurion University of the Negev

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

Abstract

SAPO-11 component of Pt/SAPO-11-Al₂O₃ catalysts displays relatively low hydrothermal stability in hydrotreating of vegetable oils that produces water during the process. Application of XRD, HRTEM, NH₃ TPD, TPO, H₂ pulse chemisorptions and ²⁹Si MAS NMR revealed that the reason for hydrothermal deactivation of SAPO-11 is partially reversible desilication of its framework. This results in gradual loss of acidity and catalytic activity in isomerization of normal paraffins - products of oil deoxygenation. Addition of amine surfactant hexadecylamine to SAPO-11 crystallization gel at HDA/Al₂O₃ ratio of ∼0.6 strongly increases the hydrothermal stability of SAPO-11. This translates in stable operation of Pt/SAPO-11-Al₂O₃ catalyst in hydrotreating of soybean oil yielding >99% deoxygenation and producing liquid organic product with cloud point < -35 °C containing 15 wt% monoaromatics. The stabilizing effect of HDA is a sequence of increasing the relative content of Si(nAl(4-n)Si) tetrahedra with n = 3-4 displaying higher resistance to hydrothermal desilication.

Original language	English
Pages (from-to)	164-176
Number of pages	13
Journal	Journal of Catalysis
Volume	332
DOIs	https://doi.org/10.1016/j.jcat.2015.10.005
State	Published - 1 Dec 2015

Keywords

Hydrothermal stability
Hydrotreating
Pt/SAPO-11-AlO catalysts
Soybean oil

All Science Journal Classification (ASJC) codes

Catalysis
Physical and Theoretical Chemistry

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10.1016/j.jcat.2015.10.005

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title = "Improvement of hydrothermal stability of Pt/SAPO-11 catalyst in hydrodeoxygenation-isomerization-aromatization of vegetable oil",

abstract = "SAPO-11 component of Pt/SAPO-11-Al2O3 catalysts displays relatively low hydrothermal stability in hydrotreating of vegetable oils that produces water during the process. Application of XRD, HRTEM, NH3 TPD, TPO, H2 pulse chemisorptions and 29Si MAS NMR revealed that the reason for hydrothermal deactivation of SAPO-11 is partially reversible desilication of its framework. This results in gradual loss of acidity and catalytic activity in isomerization of normal paraffins - products of oil deoxygenation. Addition of amine surfactant hexadecylamine to SAPO-11 crystallization gel at HDA/Al2O3 ratio of ∼0.6 strongly increases the hydrothermal stability of SAPO-11. This translates in stable operation of Pt/SAPO-11-Al2O3 catalyst in hydrotreating of soybean oil yielding >99% deoxygenation and producing liquid organic product with cloud point < -35 °C containing 15 wt% monoaromatics. The stabilizing effect of HDA is a sequence of increasing the relative content of Si(nAl(4-n)Si) tetrahedra with n = 3-4 displaying higher resistance to hydrothermal desilication.",

keywords = "Hydrothermal stability, Hydrotreating, Pt/SAPO-11-AlO catalysts, Soybean oil",

author = "Moshe Rabaev and Landau, {Miron V.} and Roxana Vidruk-Nehemya and Amir Goldbourt and Moti Herskowitz",

year = "2015",

month = dec,

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doi = "10.1016/j.jcat.2015.10.005",

language = "الإنجليزيّة",

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pages = "164--176",

journal = "Journal of Catalysis",

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TY - JOUR

T1 - Improvement of hydrothermal stability of Pt/SAPO-11 catalyst in hydrodeoxygenation-isomerization-aromatization of vegetable oil

AU - Rabaev, Moshe

AU - Landau, Miron V.

AU - Vidruk-Nehemya, Roxana

AU - Goldbourt, Amir

AU - Herskowitz, Moti

PY - 2015/12/1

Y1 - 2015/12/1

N2 - SAPO-11 component of Pt/SAPO-11-Al2O3 catalysts displays relatively low hydrothermal stability in hydrotreating of vegetable oils that produces water during the process. Application of XRD, HRTEM, NH3 TPD, TPO, H2 pulse chemisorptions and 29Si MAS NMR revealed that the reason for hydrothermal deactivation of SAPO-11 is partially reversible desilication of its framework. This results in gradual loss of acidity and catalytic activity in isomerization of normal paraffins - products of oil deoxygenation. Addition of amine surfactant hexadecylamine to SAPO-11 crystallization gel at HDA/Al2O3 ratio of ∼0.6 strongly increases the hydrothermal stability of SAPO-11. This translates in stable operation of Pt/SAPO-11-Al2O3 catalyst in hydrotreating of soybean oil yielding >99% deoxygenation and producing liquid organic product with cloud point < -35 °C containing 15 wt% monoaromatics. The stabilizing effect of HDA is a sequence of increasing the relative content of Si(nAl(4-n)Si) tetrahedra with n = 3-4 displaying higher resistance to hydrothermal desilication.

AB - SAPO-11 component of Pt/SAPO-11-Al2O3 catalysts displays relatively low hydrothermal stability in hydrotreating of vegetable oils that produces water during the process. Application of XRD, HRTEM, NH3 TPD, TPO, H2 pulse chemisorptions and 29Si MAS NMR revealed that the reason for hydrothermal deactivation of SAPO-11 is partially reversible desilication of its framework. This results in gradual loss of acidity and catalytic activity in isomerization of normal paraffins - products of oil deoxygenation. Addition of amine surfactant hexadecylamine to SAPO-11 crystallization gel at HDA/Al2O3 ratio of ∼0.6 strongly increases the hydrothermal stability of SAPO-11. This translates in stable operation of Pt/SAPO-11-Al2O3 catalyst in hydrotreating of soybean oil yielding >99% deoxygenation and producing liquid organic product with cloud point < -35 °C containing 15 wt% monoaromatics. The stabilizing effect of HDA is a sequence of increasing the relative content of Si(nAl(4-n)Si) tetrahedra with n = 3-4 displaying higher resistance to hydrothermal desilication.

KW - Hydrothermal stability

KW - Hydrotreating

KW - Pt/SAPO-11-AlO catalysts

KW - Soybean oil

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DO - 10.1016/j.jcat.2015.10.005

M3 - مقالة

SN - 0021-9517

VL - 332

SP - 164

EP - 176

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

Improvement of hydrothermal stability of Pt/SAPO-11 catalyst in hydrodeoxygenation-isomerization-aromatization of vegetable oil

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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