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| 铁钴修饰镍基复合载氧体化学链重整制氢研究 |
| Hydrogen production by chemical looping reforming with iron-cobalt modified nickel-based composite oxygen carriers |
| 投稿时间：2021-03-12 |
| DOI：10.13259/j.cnki.eri.2022.04.001 |
| 中文关键词: 化学链重整 复合载氧体 制氢 甲烷 |
| 英文关键词:chemical looping reforming composite oxygen carrier hydrogen production methane |
| 基金项目: |
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| 中文摘要: |
| 采用浸渍法制备Fe2O3−NiO−CeO2/γ−Al2O3和CoO−NiO−CeO2/γ−Al2O3复合载氧体，研究了不同复合载氧体对化学链重整制氢反应性能的影响。固定床活性测试实验表明，在镍铈载氧体中加入质量分数为5%的Fe2O3复合载氧体（5%Fe−Ni−Ce）的H2选择性和H2体积分数最大；在镍铈载氧体中加入CoO后，其复合载氧体的反应性能下降。循环实验表明，5%Fe−Ni−Ce复合载氧体在经过20次循环后仍保持高活性。X射线衍射（XRD）结果表明，5%Fe−Ni−Ce复合载氧体中有固溶体形成，进一步的XRD分析发现5%Fe−Ni−Ce晶粒粒径较小。扫描电子显微镜分析发现，反应前5%Fe−Ni−Ce复合载氧体的颗粒分散度最优，在经过20次循环后复合载氧体仍能保持较好的形貌。进一步的固定床实验研究表明，5%Fe−Ni−Ce复合载氧体在低温下性能良好。 |
| 英文摘要: |
| Fe2O3-NiO-CeO2/γ-Al2O3 and CoO-NiO-CeO2/γ-Al2O3 composite oxygen carriers were prepared by the impregnation method. And effect of composite oxygen carriers on the performance of hydrogen production by chemical looping reforming was studied. The activity test by a fixed bed show that hydrogen selectivity and hydrogen volume concentration increases when 5% of Fe2O3 is added into the nickel-cerium oxygen carriers, while the reaction performance of nickel-cerium oxygen carriers weakens after the addition of CoO. Cycling experiments show that 5% Fe-Ni-Ce oxygen carriers still maintain high activity after 20 cycles. XRD results show the formation of solid solution in 5% Fe-Ni-Ce oxygen carriers. Further XRD analysis shows that their particle size is smaller. SEM analysis shows that 5% Fe-Ni-Ce oxygen carriers has the best particle dispersion. After 20 cycles, they can still maintain good morphology. Further fixed-bed experiments of 5% Fe-Ni-Ce oxygen carriers show good performance at low temperature. |
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