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| DOI | 10.1016/j.fuel.2024.131057 |
| A novel bifunctional catalyst obtained by in situ introduction of hierarchically structured HZSM-5 for direct DME synthesis from CO2 hydrogenation | |
| 发表日期 | 2024 |
| ISSN | 0016-2361 |
| EISSN | 1873-7153 |
| 起始页码 | 364 |
| 卷号 | 364 |
| 英文摘要 | Hydrogenation of CO2 to dimethyl ether (DME) is an effective measure to deal with global climate change and solve the shortage of energy supply and demand. A series of CuZn/HZ bifunctional catalysts were prepared using CuZn bimetallic coordination polymer as the precursor by in-situ introduction method and physical blend. The in situ introduction method increases the interaction between Cu, ZnO, and HZSM-5, thereby providing a close contact environment between the metal and the acidic site. It is demonstrated that the synergistic effect of metal active sites and acid dehydration sites can increase the production of methanol and DME during CO2 conversion. CuZn/HZ-IS-AC catalyst prepared by in situ introduction of ammonia-citric acid-modified HZSM-5 has more CuZnO interfaces and basic sites, thus improving the adsorption and activation of CO2. Moreover, CuZn/HZ-IS-AC catalyst with hierarchical structure is more conducive to product diffusion and DME selectivity. Compared with the catalyst prepared by the physical method, the CuZn/HZ-IS-AC catalyst prepared by in situ introduction method has excellent catalytic properties with the CO2 conversion rate of 31.2 % and the DME selectivity of 50.6 % at 260 celcius and 3.0 MPa. In situ DRIFTS analysis showed that abundant formate intermediates and high CO2 adsorption capacity were favorable for CO2 hydrogenation. Therefore, the catalyst constructed on the microstructure can realize the efficient coupling of metal actives and the acidic site, the acid-base regulation and effectively improved the catalytic properties of CO2 hydrogenation. |
| 英文关键词 | Dimethyl ether; In-situ introduction; CO2 hydrogenation; CuZn bimetallic coordination polymer |
| 语种 | 英语 |
| WOS研究方向 | Energy & Fuels ; Engineering |
| WOS类目 | Energy & Fuels ; Engineering, Chemical |
| WOS记录号 | WOS:001174722100001 |
| 来源期刊 | FUEL
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/300293 |
| 作者单位 | Xiangtan University; Shandong University of Technology |
| 推荐引用方式 GB/T 7714 | . A novel bifunctional catalyst obtained by in situ introduction of hierarchically structured HZSM-5 for direct DME synthesis from CO2 hydrogenation[J],2024,364. |
| APA | (2024).A novel bifunctional catalyst obtained by in situ introduction of hierarchically structured HZSM-5 for direct DME synthesis from CO2 hydrogenation.FUEL,364. |
| MLA | "A novel bifunctional catalyst obtained by in situ introduction of hierarchically structured HZSM-5 for direct DME synthesis from CO2 hydrogenation".FUEL 364(2024). |
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