Effects of B-site Al doping on microstructure characteristics and hydrogen production performance of novel LaNixAl1-xO3-δ perovskite in methanol steam reforming
(2023) In Energy 268.- Abstract
A series of B-site aluminum doped LaNixAl1-xO3-δ (x = 0–1) perovskite samples were prepared by the sol-gel method and applied as catalysts for methanol steam reforming (MSR). The synthesized perovskite catalysts were characterized by SEM, XRD, SEM-EDS, XPS, TEM and BET. Results showed that LaNi0.4Al0.6O3-δ exhibited the highest methanol conversion and hydrogen production amount per unit time. However, the excessive aluminum content led to a decrease in H2 selectivity, and the high W/M promoted the reverse water-gas shift reaction (RWGS), which resulted in a decrease in CO selectivity and an increase in CO2 selectivity. The results of XRD, XPS and BET... (More)
A series of B-site aluminum doped LaNixAl1-xO3-δ (x = 0–1) perovskite samples were prepared by the sol-gel method and applied as catalysts for methanol steam reforming (MSR). The synthesized perovskite catalysts were characterized by SEM, XRD, SEM-EDS, XPS, TEM and BET. Results showed that LaNi0.4Al0.6O3-δ exhibited the highest methanol conversion and hydrogen production amount per unit time. However, the excessive aluminum content led to a decrease in H2 selectivity, and the high W/M promoted the reverse water-gas shift reaction (RWGS), which resulted in a decrease in CO selectivity and an increase in CO2 selectivity. The results of XRD, XPS and BET indicated that the LaNi0.4Al0.6O3-δ catalyst sample still exhibit a very typical perovskite structure after hydrogen reduction treatment. The results also indicated that there were active sites for MSR on the LaNi0.4Al0.6O3-δ sample that were not successfully reduced, but the specific surface area and porous characteristics of the catalyst were changed by H2 reduction treatment. The optimal reaction temperature, GHSV and W/M were determined to be 600 °C, 10,520 h−1, 3:1, respectively. In addition, the LaNi0.4Al0.6O3-δ shows high catalytic activity within 20 h of stability test. The average methanol conversion and H2 selectivity during 20 h were 91% and 93% on average, respectively.
(Less)
- author
- Shen, Qiuwan ; Shao, Zicheng ; Li, Shian ; Yang, Guogang and Sunden, Bengt LU
- organization
- publishing date
- 2023-04-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Al doping, Characteristics, LaNiAlO, Methanol steam reforming, Optimal reaction parameters
- in
- Energy
- volume
- 268
- article number
- 126540
- publisher
- Elsevier
- external identifiers
-
- scopus:85146465205
- ISSN
- 0360-5442
- DOI
- 10.1016/j.energy.2022.126540
- language
- English
- LU publication?
- yes
- id
- a0daf30d-c263-4b4b-a005-542676f17842
- date added to LUP
- 2024-01-12 11:39:11
- date last changed
- 2024-01-12 11:39:11
@article{a0daf30d-c263-4b4b-a005-542676f17842, abstract = {{<p>A series of B-site aluminum doped LaNi<sub>x</sub>Al<sub>1-x</sub>O<sub>3-δ</sub> (x = 0–1) perovskite samples were prepared by the sol-gel method and applied as catalysts for methanol steam reforming (MSR). The synthesized perovskite catalysts were characterized by SEM, XRD, SEM-EDS, XPS, TEM and BET. Results showed that LaNi<sub>0.4</sub>Al<sub>0.6</sub>O<sub>3-δ</sub> exhibited the highest methanol conversion and hydrogen production amount per unit time. However, the excessive aluminum content led to a decrease in H<sub>2</sub> selectivity, and the high W/M promoted the reverse water-gas shift reaction (RWGS), which resulted in a decrease in CO selectivity and an increase in CO<sub>2</sub> selectivity. The results of XRD, XPS and BET indicated that the LaNi<sub>0.4</sub>Al<sub>0.6</sub>O<sub>3-δ</sub> catalyst sample still exhibit a very typical perovskite structure after hydrogen reduction treatment. The results also indicated that there were active sites for MSR on the LaNi<sub>0.4</sub>Al<sub>0.6</sub>O<sub>3-δ</sub> sample that were not successfully reduced, but the specific surface area and porous characteristics of the catalyst were changed by H<sub>2</sub> reduction treatment. The optimal reaction temperature, GHSV and W/M were determined to be 600 °C, 10,520 h<sup>−1</sup>, 3:1, respectively. In addition, the LaNi<sub>0.4</sub>Al<sub>0.6</sub>O<sub>3-δ</sub> shows high catalytic activity within 20 h of stability test. The average methanol conversion and H<sub>2</sub> selectivity during 20 h were 91% and 93% on average, respectively.</p>}}, author = {{Shen, Qiuwan and Shao, Zicheng and Li, Shian and Yang, Guogang and Sunden, Bengt}}, issn = {{0360-5442}}, keywords = {{Al doping; Characteristics; LaNiAlO; Methanol steam reforming; Optimal reaction parameters}}, language = {{eng}}, month = {{04}}, publisher = {{Elsevier}}, series = {{Energy}}, title = {{Effects of B-site Al doping on microstructure characteristics and hydrogen production performance of novel LaNi<sub>x</sub>Al<sub>1-x</sub>O<sub>3-δ</sub> perovskite in methanol steam reforming}}, url = {{http://dx.doi.org/10.1016/j.energy.2022.126540}}, doi = {{10.1016/j.energy.2022.126540}}, volume = {{268}}, year = {{2023}}, }