Parametric Analysis and Optimization of Vanillin Hydrodeoxygenation Over a Sulfided Ni-Mo/δ-Al2O3 Catalyst Under Continuous-Flow Conditions
Kristensen, Tove LU ; Hulteberg, Christian LU
; Blomberg, Sara
LU
; Tunå, Per
LU
and Abdelaziz, Omar
LU
(2023)
In Topics in Catalysis
66(17-18).
p.1341-1352
- Abstract
A fundamental understanding of the process parameters affecting the catalytic hydrodeoxygenation (HDO) of bio-oils is of significance for enabling further progression and improvement of industrial biofuel upgrading methods. Herein, a novel demonstration and evaluation of the effect of temperature, pressure, and weight hourly space velocity in the continuous HDO of vanillin to cresol over a Ni-Mo/δ-Al2O3 catalyst are presented. Response surface methodology was used as a statistical experimental design method, and the application of central composite design enabled the generation of a statistically significant simulation model and a true optimization parametric study. The distribution of Ni and Mo on... (More)
A fundamental understanding of the process parameters affecting the catalytic hydrodeoxygenation (HDO) of bio-oils is of significance for enabling further progression and improvement of industrial biofuel upgrading methods. Herein, a novel demonstration and evaluation of the effect of temperature, pressure, and weight hourly space velocity in the continuous HDO of vanillin to cresol over a Ni-Mo/δ-Al2O3 catalyst are presented. Response surface methodology was used as a statistical experimental design method, and the application of central composite design enabled the generation of a statistically significant simulation model and a true optimization parametric study. The distribution of Ni and Mo on δ-Al2O3 was confirmed using scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). No gradients with EDX mapping could be identified, and the elemental analysis showed well-dispersion of the metals. The mesoporous character of the catalyst-support system was unraveled using N2 physisorption. Experiments were conducted within the parametric range of 250–350 °C, 3–9 bar, and 15–35 h−1. Both temperature and pressure were found to have statistically significant linear and quadratic effects on the selectivity for cresol. The parametric interaction of temperature with pressure and space velocity also had a significant effect on the resulting response. The optimal temperature range becomes more critical at lower space velocities. Optimal selectivity for cresol was established at 314 °C, 5 bar, and 35 h−1. The fitting quality of the generated regression model was statistically confirmed and experimentally validated to describe the specified HDO process within the 95% two-sided confidence interval.
(Less)
- author
- Kristensen, Tove
LU
; Hulteberg, Christian
LU
; Blomberg, Sara
LU
; Tunå, Per
LU
and Abdelaziz, Omar
LU
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Biomass hydrodeoxygenation, Flow chemistry, Heterogeneous catalysis, Lignin-derived compounds, Ni-Mo/AlO catalyst, Response surface methodology
- in
- Topics in Catalysis
- volume
- 66
- issue
- 17-18
- pages
- 1341 - 1352
- publisher
- Springer
- external identifiers
-
- scopus:85144742081
- ISSN
- 1022-5528
- DOI
- 10.1007/s11244-022-01762-8
- language
- English
- LU publication?
- yes
- id
- 5d90312c-2ae7-4c69-83f8-9c9dc7b4ca5b
- date added to LUP
- 2023-01-23 12:36:40
- date last changed
- 2023-12-18 00:22:53
@article{5d90312c-2ae7-4c69-83f8-9c9dc7b4ca5b,
abstract = {{<p>A fundamental understanding of the process parameters affecting the catalytic hydrodeoxygenation (HDO) of bio-oils is of significance for enabling further progression and improvement of industrial biofuel upgrading methods. Herein, a novel demonstration and evaluation of the effect of temperature, pressure, and weight hourly space velocity in the continuous HDO of vanillin to cresol over a Ni-Mo/δ-Al<sub>2</sub>O<sub>3</sub> catalyst are presented. Response surface methodology was used as a statistical experimental design method, and the application of central composite design enabled the generation of a statistically significant simulation model and a true optimization parametric study. The distribution of Ni and Mo on δ-Al<sub>2</sub>O<sub>3</sub> was confirmed using scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). No gradients with EDX mapping could be identified, and the elemental analysis showed well-dispersion of the metals. The mesoporous character of the catalyst-support system was unraveled using N<sub>2</sub> physisorption. Experiments were conducted within the parametric range of 250–350 °C, 3–9 bar, and 15–35 h<sup>−1</sup>. Both temperature and pressure were found to have statistically significant linear and quadratic effects on the selectivity for cresol. The parametric interaction of temperature with pressure and space velocity also had a significant effect on the resulting response. The optimal temperature range becomes more critical at lower space velocities. Optimal selectivity for cresol was established at 314 °C, 5 bar, and 35 h<sup>−1</sup>. The fitting quality of the generated regression model was statistically confirmed and experimentally validated to describe the specified HDO process within the 95% two-sided confidence interval.</p>}},
author = {{Kristensen, Tove and Hulteberg, Christian and Blomberg, Sara and Tunå, Per and Abdelaziz, Omar}},
issn = {{1022-5528}},
keywords = {{Biomass hydrodeoxygenation; Flow chemistry; Heterogeneous catalysis; Lignin-derived compounds; Ni-Mo/AlO catalyst; Response surface methodology}},
language = {{eng}},
number = {{17-18}},
pages = {{1341--1352}},
publisher = {{Springer}},
series = {{Topics in Catalysis}},
title = {{Parametric Analysis and Optimization of Vanillin Hydrodeoxygenation Over a Sulfided Ni-Mo/δ-Al<sub>2</sub>O<sub>3</sub> Catalyst Under Continuous-Flow Conditions}},
url = {{http://dx.doi.org/10.1007/s11244-022-01762-8}},
doi = {{10.1007/s11244-022-01762-8}},
volume = {{66}},
year = {{2023}},
}