High‐Quality Gasoline Directly from Syngas by Dual Metal Oxide–Zeolite (OX‐ZEO) Catalysis

Despite significant efforts towards the direct conversion of syngas into liquid fuels, the selectivity remains a challenge, particularly with regard to high‐quality gasoline with a high octane number and a low content of aromatic compounds. Herein, we show that zeolites with 1D ten‐membered‐ring (10‐MR) channel structures such as SAPO‐11 and ZSM‐22 in combination with zinc‐ and manganese‐based metal oxides (ZnaMnbOx) enable the selective synthesis of gasoline‐range hydrocarbons C5–C11 directly from syngas. The gasoline selectivity reached 76.7 % among hydrocarbons, with only 2.3 % CH4 at 20.3 % CO conversion. The ratio of isoparaffins to n‐paraffins was as high as 15, and the research octane number was estimated to be 92. Furthermore, the content of aromatic compounds in the gasoline was as low as 16 %. The composition and structure of ZnaMnbOx play an important role in determining the overall activity. This process constitutes a potential technology for the one‐step synthesis of environmentally friendly gasoline with a high octane number from a variety of carbon resources via syngas. The one‐step synthesis of high‐quality gasoline from syngas with a selectivity of 76.7 % among hydrocarbons is enabled by the combination of a ZnaMnbOx oxide with a zeolite with one‐dimensional ten‐membered‐ring channels, such as SAPO‐11 or ZSM‐22. The isoparaffin/n‐paraffin ratio reached 15, and the content of aromatic compounds was significantly below the limits set by most countries.