| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 209814 | Fuel Processing Technology | 2014 | 6 Pages |
•Reduction commenced in syngas (H2/CO = 20) for 48 h.•The appropriate content of sodium improved the selectivity of syngas to light olefins and avoided the decreasing of FTS activity.•The maximum selectivity (22.4 mol.%) for C2=–C4= was observed with one of the Na-promoted catalysts in HTFT.
Direct catalytic conversion of syngas to light alkenes was carried out on sodium promoted FeMn catalysts by co-precipitation–calcination–impregnation method. N2-physisorption demonstrated that the addition of sodium decreased surface area. H2-TPR revealed that excessive sodium inhibited reduction of catalysts. XRD and MES results indicated that sodium made carburization easy. The results showed that the addition of Na/Fe in the range of 0.7–3.5 mol% could improve the light alkene selectivity in syngas conversion. A maximum in CO conversion and light olefin selectivity were noted upon increasing sodium content (2.8 mol% Na/Fe) and then declined.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
