CONSENT OF INDEPENDENT AUDITORS
We consent to the reference to our firm under the caption "Experts" and to the use of our report dated 4 January 2024, with respect to the consolidated financial statements of Arq Limited included in this registration statement (Form S-1) and related prospectus of Advanced Emissions Solutions, Inc. dated 4 January 2024.
| | |
| /s/ Ernst & Young LLP |
| London, United Kingdom |
| 4 January 2024 |