1
|
Preparation and characterization of mesoporous polymer-based solid acid catalysts for biodiesel production via transesterification of palmitic oils. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
2
|
Herold F, Oefner N, Zakgeym D, Drochner A, Qi W, Etzold BJM. The High‐Temperature Acidity Paradox of Oxidized Carbon: An
in situ
DRIFTS Study. ChemCatChem 2022. [DOI: 10.1002/cctc.202101586] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Felix Herold
- Department of Chemistry Ernst-Berl-Institut für Technische und Makromolekulare Chemie Technical University of Darmstadt Alarich-Weiss-Straße 8 64287 Darmstadt Germany
- Department of Chemical Engineering Norwegian University of Science and Technology Sem Sælandsvei 4 7491 Trondheim Norway
| | - Niklas Oefner
- Department of Chemistry Ernst-Berl-Institut für Technische und Makromolekulare Chemie Technical University of Darmstadt Alarich-Weiss-Straße 8 64287 Darmstadt Germany
| | - Dina Zakgeym
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy Forschungszentrum Jülich GmbH Egerlandstraße 3 91058 Erlangen Germany
| | - Alfons Drochner
- Department of Chemistry Ernst-Berl-Institut für Technische und Makromolekulare Chemie Technical University of Darmstadt Alarich-Weiss-Straße 8 64287 Darmstadt Germany
| | - Wei Qi
- Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Wenhua Road 72 Shenyang 110016 P. R. China
| | - Bastian J. M. Etzold
- Department of Chemistry Ernst-Berl-Institut für Technische und Makromolekulare Chemie Technical University of Darmstadt Alarich-Weiss-Straße 8 64287 Darmstadt Germany
| |
Collapse
|
3
|
Elucidating the origin of selective dehydrogenation of propane on γ-alumina under H2S treatment and co-feed. J Catal 2021. [DOI: 10.1016/j.jcat.2020.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
4
|
Chiang CL, Lin KS, Shu CW, Wu JCS, Wu KCW, Huang YT. Enhancement of biodiesel production via sequential esterification/transesterification over solid superacidic and superbasic catalysts. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.09.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
5
|
Abstract
Sulfonated carbon-based catalysts have been identified as promising solid acid catalysts, and petroleum coke (petcoke), a byproduct of the oil industry, is a potential feedstock for these catalysts. In this study, sulfur-containing (6.5 wt%) petcoke was used as a precursor for these catalysts through direct functionalization (i.e., without an activation step) with nitric acid to access the inherent sulfur. Catalysts were also prepared using sulfuric acid and a mixture of nitric and sulfuric acid (1:3 vol ratio). Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and titration were used to identify and quantify the acid sites. The activities of the prepared catalysts were determined for the esterification of octanoic acid with methanol. Petcoke had few −SO3H groups, and correspondingly no catalytic activity for the reaction. All acid treatments increased the number of −SO3H groups and promoted esterification. Treatment with nitric acid alone resulted in the oxidation of the inherent sulfur in petcoke to produce ~0.7 mmol/g of strong acid sites and a total acidity of 5.3 mmol/g. The acidity (strong acid and total) was lower with sulfuric acid treatment but this sample was more active for the esterification reaction (TOF of 31 h−1 compared to 7 h−1 with nitric acid treatment).
Collapse
|