Chemical interaction of Ce-Fe mixed oxides was investigated in methane selective oxidation via methane temperature pro-grammed reduction and methane isothermal reaction tests over Ce-Fe oxygen carriers. In methane temperature programmed reduction test, Ce-Fe oxide behaved complete oxidation at the lower temperature and selective oxidation at higher temperatures. Ce-Fe mixed oxides with the Fe content in the range of 0.1-0.5 was able to produce syngas with high selectivity in high-temperature range (800-900 °C), and a higher Fe amount over 0.5 seemed to depress the CO formation. In isothermal reaction, complete oxidation oc-curred at beginning following with selective oxidation later. Ce1-xFexO2-δ oxygen carriers (x≤0.5) were proved to be suitable for the selective oxidation of methane. Ce-Fe mixed oxides had the well-pleasing reducibility with high oxygen releasing rate and CO selec-tivity due to the interaction between Ce and Fe species. Strong chemical interaction of Ce-Fe mixed oxides originated from both Fe* activated CeO2 and Ce3+ activated iron oxides (FeOm), and those chemical interaction greatly enhanced the oxygen mobility and se-lectivity.
参考文献
| [1] | Li K;Haneda M;Gu Z;Wang H Ozawa M .Modification of CeO2 on the redox property of Fe2O3[J].Materials Letters,2013,93(0):129. |
| [2] | 王路辉,刘辉,刘源,陈英,杨淑清.Effect of precipitants on Ni-CeO2 catalysts prepared by a co-precipitation method for the reverse water-gas shift reaction[J].稀土学报（英文版）,2013(10):969-974. |
| [3] | Li K Z;Wang H;Wei Y G;Yan D X .Syngas production from methane and air via a redox process using Ce-Fe mixed oxides as oxygen carriers[J].APPLIED CATALYSIS B-ENVIRONMENTAL,2010,97(3-4):361. |
| [4] | Kongzhai Li;Hua Wang;Yonggang Wei;Dongxia Yan .Transformation of methane into synthesis gas using the redox property of Ce-Fe mixed oxides: Effect of calcination temperature[J].International journal of hydrogen energy,2011(5):3471-3482. |
| [5] | Zhu X;Wei Y G;Wang H;Li K Z .Ce-Fe oxygen carriers for chemical-looping steam methane reforming[J].International Journal of Hydrogen Energy,2013,38(11):4492. |
| [6] | Kongzhai Li;Hua Wang;Yonggang Wei .Direct conversion of methane to synthesis gas using lattice oxygen of CeO2-Fe2O3 complex oxides[J].Chemical engineering journal,2010(3):512-518. |
| [7] | K. Otsuka;T. Kaburagi;C. Yamada;S. Takenaka .Chemical storage of hydrogen by modified iron oxides[J].Journal of Power Sources,2003(2):111-121. |
| [8] | Hong-Soon Kim;Kwang-Seo Cha;Byoung-Kwan Yoo .Chemical hydrogen storage and release properties using redox reaction over the Cu-added Fe/Ce/Zr mixed oxide medium[J].Journal of industrial and engineering chemistry,2010(1):81-86. |
| [9] | Markus Thaler;Viktor Hacker .Storage and separation of hydrogen with the metal steam process[J].International journal of hydrogen energy,2012(3):2800-2806. |
| [10] | Hui Wang;Xiaojie liu;Fei Wen .Hydrogen production by the redox of iron oxide prepared by hydrothermal synthesis[J].International journal of hydrogen energy,2012(1):977-983. |
| [11] | Galvita V;Hempel T;Lorenz H;Rihko-Struckmann L K Sundmacher K .Deactivation of modified iron oxide mate-rials in the cyclic water gas shift process for CO-free hy-drogen production[J].Industrial and Engineering Chemistry Research,2007,47(02):303. |
| [12] | Galvita V;Sundmacher K .Cyclic water gas shift reactor(CWGS)for carbon monoxide removal from hydrogen feed gas for PEM fuel cells[J].CHEMICAL ENGINEERING JOURNAL,2007,134(1-3):168. |
| [13] | Vladimir Galvita;Torsten Schroder;Barbara Munder;Kai Sundmacher .Production of hydrogen with low CO_x-content for PEM fuel cells by cyclic water gas shift reactor[J].International journal of hydrogen energy,2008(4):1354-1360. |
| [14] | 何润霞,姜浩强,武芳,智科端,王娜,周晨亮,刘全生.Effect of doping rare earth oxide on performance of copper-manganese catalysts for water-gas shift reaction[J].稀土学报（英文版）,2014(04):298-305. |
| [15] | Chinchanop Pojanavaraphan;Apanee Luengnaruemitchai;Erdogan Gulari .Effect of support composition and metal loading on Au catalyst activity in steam reforming of methanol[J].International journal of hydrogen energy,2012(19):14072-14084. |
| [16] | J.D. Holladay;J. Hu;D.L. King .An overview of hydrogen production technologies[J].Catalysis Today,2009(4):244-260. |
| [17] | Tabakova T;Manzoli M;Paneva D;Boccuzzi F, Idakiev V, Mitov I .CO-free hydrogen production over Au/CeO2-Fe2O3 catalysts：Part 2. Impact of the support composition on the performance in the water-gas shift reaction[J].Appl Catal B：Environ,2011,101(3-4):266. |
| [18] | Perez-Alonso FJ;Melian-Cabrera I;Granados ML;Kapteijn F;Fierro JLG .Synergy of FexCe1-xO2 mixed oxides for N2O decomposition[J].Journal of Catalysis,2006(2):340-346. |
| [19] | ZHU Xing,WANG Hua,WEI Yonggang,LI Kongzhai,CHENG Xianming.Hydrogen and syngas production from two-step steam reforming of methane over CeO2-Fe2O3 oxygen carrier[J].稀土学报（英文版）,2010(06):907-913. |
| [20] | Reactivity of pulverized coals during combustion catalyzed by CeO_2 and Fe_2O_3[J].Combustion and Flame,2010(2):351. |
| [21] | Robbins M;Wertheim G K;Menth A;Sherwood R C .Preparation and properties of polycrystalline cerium or-thoferrite(CeFeO3)[J].Journal of Physics and Chemistry of Solids,1969,30(07):1823. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%