Co-precipitation continuous synthesis of the Ni-Rh-Ce0.75Zr0.25O2-delta catalyst in the membrane dispersion microreactor system for n-dodecane steam reforming to hydrogen
文献类型：期刊论文
| 作者 | BSRF用户 |
| 刊名 | FUEL
 |
| 出版日期 | 2021 |
| 卷号 | 297页码:120785 |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2021.120785 |
| 文献子类 | Article |
| 英文摘要 | Precipitation at the micro-scale to produce nanoparticles with small particle size and uniform dispersion is feasible. A membrane dispersion microreactor (MR) - matching spiral tube system was used to synthesize highly dispersed (MR)-Ni-Rh-Ce0.75Zr0.25O2-delta and (MR)-Ni- Ce0.75Zr0.25O2-delta catalysts with active metal particle sizes of 4.3 and 4.6 nm. Rapid nucleation of the catalyst precursor was achieved in the microreactor and ordered growth occurred in the spiral tube. Characterization by TEM, pulse CO chemisorption, and Raman spectroscopy prove that the catalysts synthesized in the microreactor system possess more oxygen vacancies and uniformly supported active metal than those in the stirred tank (S). The apparent activation energies of the catalysts for ndodecane steam reforming (SR) increase in the following order: (MR)-Ni-Rh-CZO (62 kJ/mol) < (S)-Ni-Rh-CZO (67 kJ/mol) < (MR)-Ni- CZO (77 kJ/mol) < (S)-Ni-CZO (84 kJ/mol). The initial hydrogen yields of (MR)-Ni-RhCZO and (S)-Ni-Rh-CZO are 88 and 59%, respectively, at T = 650 degrees C, WHSV = 12 h(-1), and S/C = 4. TPSR experiments indicated that (MR)-Ni-CZO mostly contributed to the cleavage of C-C and C-H bonds. The carbon deposition in the first 12 h of n-dodecane SR is only 2.4 mg/(g-cat.mol-H-2). For optimizing the continuous synthesis method, the initial hydrogen yield can be further improved to above 95% by increasing the mixing intensity, decreasing the ratio of the dispersed to continuous phase, and increasing the spiral tube length to synthesize better-dispersed catalysts. |
| 电子版国际标准刊号 | 1873-7153 |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000647585100005 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/292967]  |
| 专题 | 北京同步辐射装置 |
| 推荐引用方式 GB/T 7714 | BSRF用户. Co-precipitation continuous synthesis of the Ni-Rh-Ce0.75Zr0.25O2-delta catalyst in the membrane dispersion microreactor system for n-dodecane steam reforming to hydrogen[J]. FUEL,2021,297:120785. |
| APA | BSRF用户.(2021).Co-precipitation continuous synthesis of the Ni-Rh-Ce0.75Zr0.25O2-delta catalyst in the membrane dispersion microreactor system for n-dodecane steam reforming to hydrogen.FUEL,297,120785. |
| MLA | BSRF用户."Co-precipitation continuous synthesis of the Ni-Rh-Ce0.75Zr0.25O2-delta catalyst in the membrane dispersion microreactor system for n-dodecane steam reforming to hydrogen".FUEL 297(2021):120785. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。