Abstract
The effects of MgO promoter on the physicochemical properties and catalytic performance of Ni/Al2O3 catalysts for the partial oxidation of methane to syngas were studied by means of BET, XRD, H2-TPR, TEM and performance evaluation. It was found that the MgO promoter benefited from the uniformity of nickel species in the catalysts, inhibited the formation of NiAl2O4 spinel and improved the interaction between nickel species and support. These results were related to the formation of NiO-MgO solid solution and MgAl2O4 spinel. Moreover, for the catalysts with a proper amount of MgO promoter, the nickel dispersiveness was enhanced, therefore making their catalytic performance in methane partial oxidation improved. However, the excessive MgO promoter exerted a negative effect on the catalytic performance. Meanwhile, the basicity of MgO promoted the reversed water-gas shift reaction, which led to an increase in CO selectivity and a decrease in H2 selectivity. The suitable content of MgO promoter in Ni/Al2O3 catalyst was ∼7 wt-%.
Similar content being viewed by others
References
Wu T H, Yuan Y Y, Wan H L. On performance of supported transient metal catalysts for partial oxidation of methane to syngas. J Zhejiang Normal Univ (Nat Sci), 2004, 27(2): 147–151 (in Chinese)
Wang H T, Li Z H, Tian S X, He F. Effect of promoter on catalytic performance of Ni/A12O3 catalyst in partial oxidation of methane to syngas. J Fuel Chem Technol, 2004, 32(4): 475–480 (in Chinese)
Ashcroft A T, Cheetham A K, Foord J S, Green M L H, Grey C P, Murrell A J, Vernon P D F. Selective oxidation of methane to synthesis gas using transition metal catalysts. Nature, 1990, 344: 319–321
Zhang Y H, Xiong G X, Sheng S S, Yang W S. Deactivation studies over NiO/γ-Al2O3 catalysts for partial oxidation of methane to syngas. Catal Today, 2000, 63: 517–522
Ji Y Y, Li W Z, Xu H Y, Chen Y X. Catalytic partial oxidation of methane to synthesis gas over Ni/γ-Al2O3 catalyst in a fluidizedbed. Appl Catal A, 2001, 213(1): 25–31
Wu Y C, Yang Y, Li Y, Cui P. Effect of addition of alumina sol on γ → α phase transformation of ultrafined alumina. Acta Phys-Chim Sin, 2005, 21(1): 79–83 (in Chinese)
Gong L Q, Chen J X, Qiu Y D, Zhang J Y. Effects of calcinations temperature on structure and catalytic performance of Ni/MgOA12O3 catalysts for partial oxidation of methane. J Fuel Chem Technol, 2005, 33(2): 224–228 (in Chinese)
Zhang Y H, Xiong G X, Sheng S S, Liu S L, Yang W S. Interaction of NiO with γ-Al2O3 supporter of NiO/γ-Al2O3 catalysts. Acta Phys-Chim Sin, 1999, 15(8): 735–741 (in Chinese)
Tornianen P, Chu X, Schmidt L D. Comparison of monolith-supported metals for the direct oxidation of methane to syngas. J Catal, 1994, 146(1): 1–10
Guo Q S, Shen Y N, Liu Z S. Ni/γ-Al2O3 catalyst covered with a layer of MgAl2O4 spinel. Petrochem Technol, 1989, 18(9): 606–609 (in Chinese)
Zhang R, Li D Q, Zhang F Z, Evans D G, Duan X. Modelling and characterization of monolayer dispersion of magnesium oxide on A12O3. Fine Chem, 2003, 20(2): 74–77 (in Chinese)
Huan G H, Yin D L, Wen J J, Zhang M K, Xu B. Effect of nickel content on sulfur tolerance of nickel-based catalysts for aromatic hydrogenation. Ind Catal, 2005, 13(1): 13–16 (in Chinese)
Zhong S H, Yang Z L, Wang A J. Study of Ni-Cu/MgSiO catalyst for methane partial oxidation to produce hydrogen in presence of steam. Petrochem Technol, 2004, 33(8): 709–713 (in Chinese)
Morterra C, Ghiotti G, Boccuzzi F, Coluccia S. An infrared spectroscopic investigation of the surface properties of magnesium aluminate spinel. J Catal, 1978, 51(3): 299–313
Yu L, Yuan S H, Tian J Y, Wang S, Chu W. Partial oxidation of methane to syngas effects of support and promoter oil catalytic performance of Ni/Al2O3 catalyst. Chinese J Catal, 2001, 22(4): 383–386 (in Chinese)
Liu X Y, Wang S J, Guo L C. Study on out-layer Mg-A1 spinel of alumina base (I): Phase structure, pore structure and surface acidity of out-layer Mg-A1 spinel and state of supported Pd. Chinese J Catal, 1994, 15(1): 1–7 (in Chinese)
Wei Z B, Xin Q, Sham E L, Grange P, Delmon B. Studies on TiO2 distribution over Al2O3 by AEM. Acta Phys-Chim Sin, 1990, 6(4): 474–479 (in Chinese)
Wang C M, Zhao B Y, Xie Y C. Advances in the studies of spontaneous monolayer dispersion of oxides and salts on supports. Chinese J Catal, 2003, 24(6): 475–482 (in Chinese)
Lin C Z. Study on the disperse state of NiO onto the surface of γ-Al2O3. J Shengyang Normal Univ (Nat Sci), 1999, 2: 28–31 (in Chinese)
Dun C, Zeng Y C, Liang J F. Parameter of dispersion threshold value in the preparation of catalyst. J Jiaying Univ (Nat Sci), 2001, 19(6): 36–39 (in Chinese)
Xu S, Zhao R, Wang X L. Highly coking resistant and stable Ni/γ-Al2O3 catalysts prepared using microemulsion for partial oxidation of methane. J Fudan Univ (Nat Sci), 2003, 42(3): 343–346 (in Chinese)
Zhang Y F, Xie Y C, Xiao N H, Han W, Tang Y Q. Effect of MgO and La2O3 additives on Ni methanation catalyst. Petrochem Technol, 1985, 14(3): 141–148 (in Chinese)
Li J T, Zhang W D, Yan Q G, Wan H L. Effect of MgO/Al2O3 molar ratio on catalytic performance of Ni-based catalysts for CO2 reforming of methane. J Xiamen Univ (Nat Sci), 1999, 38(4): 569–572 (in Chinese)
Chen J X, Qiu Y J, Zhang J Y, Su W H. Influence of La2O3 and CeO2 promoters on physico-chemical properties and catalytic performance of Ni/MgO catalyst in methane reforming with carbon dioxide. Acta Phys-Chim Sin, 2004, 20(1): 76–80 (in Chinese)
Xu Z, Li Y M, Zhang J Y. Performance of supported nickel catalyst for reforming of CH4 with CO2 to syngas (II): Effect of basic promoters. Chinese J Catal, 1997, 18(5): 364–367 (in Chinese)
Guo J J, Lou H, Zhao H, Chai D F, Zheng X M. Dry reforming of methane over nickel catalysts supported on magnesium aluminate spinels. Appl Catal A, 2004, 273: 75–82
Rostrup-Nielsen J R. Catalysis: Science and Technology, Vol. 5. In: Anderson J R, Boudart M, eds. Catalytic Steam Reforming. Berlin: Springer, 1984, 1–120
Parmaliana A, Arena F, Frusteri F, Giordano N. Temperature-programmed reduction study of NiO-MgO interactions in magnesia-supported Ni catalysts and NiO-MgO physical mixture. J Chem Soc, Faraday Trans, 1990, 86(14): 2663–2669
Pengpanich S, Meeyoo V, Rirksomboon T. Methane partial oxidation over Ni/CeO2-ZrO2 mixed oxide solid solution catalysts. Catal Today, 2004(93–95): 95–105
Ge X, Shen J Y. Studies on coupling of dehydrogenation of ethane with reversed water-gas shift reaction for ethylene. Chem J Chin Univ, 2001, 22(12): 2085–2090 (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Journal of Fuel Chemistry and Technology, 2006, 34(4): 450–455 [译自: 燃料化学学报]
Rights and permissions
About this article
Cite this article
Qiu, Y., Chen, J. & Zhang, J. Effects of MgO promoter on properties of Ni/Al2O3 catalysts for partial oxidation of methane to syngas. Front. Chem. Eng. China 1, 167–171 (2007). https://doi.org/10.1007/s11705-007-0031-7
Issue Date:
DOI: https://doi.org/10.1007/s11705-007-0031-7