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镍镁铝水滑石制备及乙二醇水相重整制氢性能

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Abstract:

采用共沉淀法成功合成了不同n(Ni2+)/n(Mg2+)/n(Al3+)(摩尔比)的镍镁铝水滑石,用粉末X射线衍射和氢气程序升温还原、乙二醇水相重整制氢探针反应对镍镁铝水滑石的物相、组成、还原过程和催化性能进行表征。结果表明所形成的纯相水滑石的[n(Ni2+)+n(Mg2+)]/n(Al3+)为1.25~6.50。NiMgAl水滑石衍生催化剂(反应后)的物相由Ni、MgAl水滑石和AlO(OH)相组成。催化剂前躯体还原过程包括层板镍还原和复合氧化物中镍还原两步。随着反应温度和给料速率增加、反应压力降低,乙二醇水相重整制氢产率依次增加。随着Mg含量增加,其氢气选择性呈增加趋势;增加Ni含量,氢气选择性依次降低、烷烃选择性逐渐升高;综合氢气选择性和产率,NiMgAl水滑石性能最佳。

References

[1]  QI Aidu, WANG Shudong, FU Guizhi, et al. La-Ce-Ni-O monolithic perovskite catalysts potential for gasoline autothermal reforming system [J]. Appl Catal A, 2005, 281(1/2): 233-246. [2] HUBER G W, IBORRA S, CORMA A. Synthesis of transportation fuels from biomass: Chemistry, catalysts, and engineering [J]. Chem Rev, 2006, 106(9): 4044-4098. [3] CORTRIGHT R D, DAVDA R R, DUMESIC J A. Hydrogen from catalytic reforming of biomass-derived hydrocarbons in liquid water [J]. Nature, 2002, 418(6901): 964-967. [4] HE R, DAVDA R R, DUMESIC J A. In situ ATR-IR spectroscopic and reaction kinetics studies of water-gas shift and methanol reforming on Pt/Al2O3 catalysts in vapor and liquid phases [J]. J Phys Chem B, 2005, 109(7): 2810-2820. [5] HUBER G W, SHABAKER J W, DUMESIC J A. Raney Ni-Sn catalyst for H2 production from biomass-derived hydrocarbons [J]. Science, 2003, 300(5628): 2075-2077. [6] SHABAKER J W, HUBER G W, DUMESIC J A. Aqueous-phase reforming of oxygenated hydrocarbons over Sn-modified Ni catalysts [J]. J Catal, 2004, 222(1): 180-191. [7] DAVDA R R, SHABAKER J W, HUBER G W, et al. A review of catalytic issues and process conditions for renewable hydrogen and alkanes by aqueous-phase reforming of oxygenated hydrocarbons over supported metal catalysts [J]. Appl Catal B, 2005, 56(1-2): 171-186. [8] SHABAKER J W, SIMONETTI D A, CORTRIGHT R D, et al. Sn-modified Ni catalysts for aqueous-phase reforming: Characteri- zation and deactivation studies [J]. J Catal, 2005, 231(1): 67-76. [9] BAI Y, LU C S, MA L, et al. Hydrogen production by aqueous-phase reforming of ethylene glycol over Pt catalysts supported on gamma- Al2O3 modified with Ce and Mg [J]. Chin J Catal, 2006, 27(3): 275-280. [10] XIE F Z, CHU X W, HU H R, et al. Characterization and catalytic properties of Sn-modified rapidly quenched skeletal Ni catalysts in aqueous-phase reforming of ethylene glycol [J]. J Catal, 2006, 241(1): 211-220. [11] CAVANI F, TRIFIRO F, VACCARI A. Hydrotalcite-type anionic clays: preparation, properties, and applications [J]. Catal Today, 1991, 11(2): 173-301. [12] CORONADO E, GALAN-MASCAROS J R, MARTI-GASTALDO C, et al. Spontaneous magnetization in Ni-Al and Ni-Fe layered double hydroxides [J]. Inorg Chem, 2008, 47(19): 9103-9110. [13] MITSUDOME T, MIKAMI Y, EBATA K, et al. Copper nanoparticles on hydrotalcite as a heterogeneous catalyst for oxidant-free dehydrogenation of alcohols [J]. Chem Commun, 2008, (39): 4804-4806. [14] LI Liang, SHI Jianlin. In situ assembly of layered double hydroxide nano- crystallites within silica mesopores and its high solid base catalytic activity [J]. Chem Commun, 2008, (8): 996-998. [15] RIVES V, PRIETO O, DUBEY A, et al. Synergistic effect in the hydroxylation of phenol over CoNiAl ternary hydrotalcites [J]. J Catal, 2003, 220(1): 161-171. [16] PREVOT V, FORANO C, BESSE J P. Hydrolysis in polyol: New route for hybrid-layered double hydroxides preparation [J]. Chem Mater, 2005, 17(26): 6695-6701. [17] 潘国祥, 倪哲明, 曹枫, 等. 新型镍锡铝水滑石的合成及还原性能[J]. 硅酸盐学报, 2009, 37(10): 1730-1734. PAN Guoxiang, NI Zheming, CAO Feng, et al. J Chin Ceram Soc (in Chinese), 2009, 37(10): 1730-1734. [18] KANNAN S. Catalytic applications of hydrotalcite-like materials and their derived forms [J]. Catal Surv Asia, 2006, 10(3/4): 117-137.

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