Single-pass transformation of syngas into ethanol with high selectivity by triple tandem catalysis.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32047150.
- Also identified by DOI 10.1038/s41467-020-14672-8 and PMC identifier 7012879.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Synthesis of ethanol from non-petroleum carbon resources via syngas (a mixture of H<sub>2</sub> and CO) is an important but challenging research target. The current conversion of syngas to ethanol suffers from low selectivity or multiple processes with high energy consumption. Here, we report a high-selective conversion of syngas into ethanol by a triple tandem catalysis. An efficient trifunctional tandem system composed of potassium-modified ZnO-ZrO<sub>2</sub>, modified zeolite mordenite and Pt-Sn/SiC working compatibly in syngas stream in one reactor can afford ethanol with a selectivity of 90%. We demonstrate that the K<sup>+</sup>-ZnO-ZrO<sub>2</sub> catalyses syngas conversion to methanol and the mordenite with eight-membered ring channels functions for methanol carbonylation to acetic acid, which is then hydrogenated to ethanol over the Pt-Sn/SiC catalyst. The present work offers an effective methodology leading to high selective conversion by decoupling a single-catalyst-based complicated and uncontrollable reaction into well-controlled multi-steps in tandem in one reactor.