Promotional role of MgO on sorption-enhanced steam reforming of ethanol over Ni/CaO catalysts

被引：46

作者：

Sang, Sier ^{[1
]}

Zhao, Zhi-Jian ^{[1
]}

Tian, Hao ^{[1
]}

Sun, Zhao ^{[1
,2
]}

Li, Hongfang ^{[1
]}

Assabumrungrat, Suttichai ^{[3
]}

Muhammad, Tahir ^{[1
]}

Zeng, Liang ^{[1
]}

Gong, Jinlin ^{[1
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn, Sch Chem Engn & Technol, Minist Educ,Key Lab Green Chem Technol, Tianjin 300072, Peoples R China

[2] Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing, Jiangsu, Peoples R China

[3] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok, Thailand

来源：

AICHE JOURNAL | 2020年 / 66卷 / 04期

基金：

中国国家自然科学基金;

关键词：

ethanol reforming; hydrogen production; sorption-enhanced reforming; EFFICIENT HYDROGEN-PRODUCTION; CYCLIC CO2 CAPTURE; H-2; PRODUCTION; MULTIFUNCTIONAL CATALYSTS; BIFUNCTIONAL CATALYST; CALCIUM-OXIDE; NI; WATER; SORBENTS; BIOMASS;

D O I：

10.1002/aic.16877

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This article describes the design and synthesis of MgO-modified Ni/CaO catalysts for sorption-enhanced steam reforming of ethanol. The results show that the introduction of MgO effectively increases the dispersion of CaO via forming MgCa(CO3)(2) precursor. In the prepared MgO-modified Ni/CaO catalysts, metallic Ni exists around MgO supported on CaO. Both 100% ethanol conversion and >96% hydrogen purity can be stabilized in 10 cycles over the catalyst containing 20 wt% MgO. The interaction between metallic Ni and MgO enhances the sintering resistance of the catalyst. More importantly, reaction pathway studies have confirmed that the formation of CaCO3 hinders the activation of H2O on the Ni/CaO catalyst surface, and thus inhibits the conversion of the reaction intermediates including HCO* and CHx*. MgO can dissociate H2O to form hydroxyl groups which participate in the conversion of the reaction intermediates, thereby the MgO-modified Ni/CaO catalysts have better catalytic performance and carbon deposition resistance.

引用

页数：13

共 59 条

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