Functionalized ionic liquid coatings in the Pd-catalyzed selective hydrogenation of acetylene in ethylene-rich feeds

Kremitzl D, Röhrs K, Williams MB, Schulz P, Wasserscheid P (2024)

Publication Language: English

Publication Type: Journal article

Publication year: 2024

Journal

Journal of Ionic Liquids Elsevier

Book Volume: 4

Article Number: 100092

Journal Issue: 1

DOI: 10.1016/j.jil.2024.100092

Abstract

This study explores the tuning of a Pd/Al2O3 hydrogenation catalyst for the selective removal of trace acetylene from ethylene-rich feeds by coating the catalyst with non-functionalized and functionalized ionic liquids (denoted as SCILL and Advanced SCILL materials, respectively). These materials were tested in an automated continuous hydrogenation rig converting 3300 ppm of acetylene in excess ethylene, a gas mixture mimicking a technical front-end steam cracker feed composition. While the sulfonic-acid-functionalized IL coating resulted in a highly active but very unselective catalyst converting mainly ethylene to ethane, an Advanced SCILL catalyst prepared from a nitrile-functionalized IL reduced the acetylene concentration down to less than 1 ppm, while leaving over 99% of the ethylene untouched. We also examined the potential transformations of the IL layer under reaction conditions by means of 1H NMR. Except for a ketone-functionalized IL, which was inherently labile, all tested ILs primarily underwent C2-ethylation or remained unaltered. Our findings highlight the great potential of functionalized ILs in modifying heterogeneous hydrogenation catalysts.

Authors with CRIS profile

Daniel Kremitzl Lehrstuhl für Chemische Reaktionstechnik Karoline Röhrs Lehrstuhl für Chemische Reaktionstechnik Peter Schulz Lehrstuhl für Chemische Reaktionstechnik Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik

Additional Organisation(s)

Lehrstuhl für Chemische Reaktionstechnik Technische Fakultät

Related research project(s)

Catalysis at Liquid Interfaces (CLINT) (SFB 1452 CLINT) Jan. 1, 2021 - Dec. 31, 2024

Involved external institutions

Hochschule Bonn-Rhein-Sieg DE Germany (DE)

How to cite

APA:

Kremitzl, D., Röhrs, K., Williams, M.B., Schulz, P., & Wasserscheid, P. (2024). Functionalized ionic liquid coatings in the Pd-catalyzed selective hydrogenation of acetylene in ethylene-rich feeds. Journal of Ionic Liquids, 4(1). https://doi.org/10.1016/j.jil.2024.100092

MLA:

Kremitzl, Daniel, et al. "Functionalized ionic liquid coatings in the Pd-catalyzed selective hydrogenation of acetylene in ethylene-rich feeds." Journal of Ionic Liquids 4.1 (2024).

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