CaO对Cu-ZnO-ZrO2催化CO2加H2合成甲醇性能影响

被引：5

作者：

陈俊军 ^{[1
,2
]}

高文桂 ^{[1
,3
]}

王华 ^{[1
,3
]}

纳薇 ^{[1
,3
]}

机构：

[1] 昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室

[2] 昆明理工大学化学工程学院

[3] 昆明理工大学冶能与能源工程学院

来源：

燃料化学学报 | 2016年 / 44卷 / 04期

关键词：

并流共沉淀法; CaO; Cu-ZnO-ZrO2; CO2加H2; 甲醇;

D O I：

暂无

中图分类号：

O643.36 [催化剂]; TQ223.121 [];

学科分类号：

081705 ; 0817 ;

摘要：

用CaO作为改性助剂,采用并流共沉淀法制备了CuO∶ZnO∶ZrO2为5∶4∶1（物质的量比）,CaO添加量为0、1%、2%、4%、8%、16%（摩尔分数）的六组催化剂。用X射线衍射（XRD）、微商热重（TG-DTG）、傅里叶红外（FT-IR）、N2吸附脱附（BET）、X射线光电子能谱（XPS）、氢气程序升温还原（H2-TPR）、CO2程序升温脱附（CO2-TPD）、NH3程序升温脱附（NH3-TPD）对催化剂进行了表征。用自制固定床评价了催化剂活性。结果表明,添加CaO后,催化剂路易斯酸性和表面碱性增强;催化剂母体中高温碳酸盐含量增加,热稳定性增强,CuO颗粒粒径变小,Cu-Zn协同作用增强,Cu比表面积增大,分散性变好。催化剂活性受到表面酸碱性、铜比表面积、Cu-Zn协同作用和铜分散性共同影响。当CaO为2%时,铜比表面积为79.3 m2/g、铜分散度为34.8%、CO2转化率为24.55%、甲醇选择性为19.01%、甲醇收率为0.044 g/（gcat·h）,催化剂活性最好。过量CaO占据催化剂孔道和覆盖表面活性位,使催化剂路易斯酸性和表面碱性过强,CuO与H2有效接触减少,CO2难以脱附,催化活性下降。因此,适量CaO（2%）添加可促进CO2加氢反应合成甲醇。

引用

页码：437 / 448

页数：12

共 28 条

[1]

Iso -butanol direct synthesis from syngas over the alkali metals modified Cr/ZnO catalysts.[J].Li Tan;Guohui Yang;Yoshiharu Yoneyama;Yongli Kou;Yisheng Tan;Tharapong Vitidsant;Noritatsu Tsubaki.Applied Catalysis A; General.2015,

[2]

Direct synthesis of dimethyl ether from biomass-derived syngas over Cu–ZnO–Al 2 O 3 –ZrO 2 ( x )/γ-Al 2 O 3 bifunctional catalysts: Effect of Zr-loading.[J].Faen Song;Yisheng Tan;Hongjuan Xie;Qingde Zhang;Yizhuo Han.Fuel Processing Technology.2014,

[3]

Development of highly stable catalyst for methanol synthesis from carbon dioxide.[J].Congming Li;Xingdong Yuan;Kaoru Fujimoto.Applied Catalysis A; General.2014,

[4]

The Influence of the Precipitation/Ageing Temperature on a Cu/ZnO/ZrO2 Catalyst for Methanol Synthesis from H2 and CO2.[J].Elias Frei;Dr. Achim Schaadt;Dr. Thilo Ludwig;Prof.Dr. Harald Hillebrecht;Prof.Dr. Ingo Krossing.ChemCatChem.2014, 6

[5]

Influence of rare-earth elements (La; Ce; Nd and Pr) on the performance of Cu/Zn/Zr catalyst for CH 3 OH synthesis from CO 2.[J].Hongyan Ban;Congming Li;Kenji Asami;Kaoru Fujimoto.Catalysis Communications.2014,

[6]

An overview on the production of bio-methanol as potential renewable energy.[J].N.S. Shamsul;S.K. Kamarudin;N.A. Rahman;N.T. Kofli.Renewable and Sustainable Energy Reviews.2014,

[7]

The changing nature of the active site of Cu-Zn-Zr catalysts for the CO 2 hydrogenation reaction to methanol.[J].G. Bonura;M. Cordaro;C. Cannilla;F. Arena;F. Frusteri.Applied Catalysis B: Environmental.2014,

[8] How to Prepare a Good Cu/ZnO Catalyst or the Role of Solid State Chemistry for the Synthesis of Nanostructured Catalysts [J].

Behrens, Malte ;

Schloegl, Robert .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 2013, 639 (15) :2683-2695

[9]

Effect of CaO addition on acid properties of Ni–Ca/Al 2 O 3 catalysts applied to ethanol steam reforming.[J].Kariny F.M. Elias;Alessandra F. Lucrédio;Elisabete M. Assaf.International Journal of Hydrogen Energy.2013, 11

[10] CO2 hydrogenation to methanol over Cu/ZnO/ZrO2 catalysts prepared via a route of solid-state reaction [J].

Guo, Xiaoming ;

Mao, Dongsen ;

Lu, Guanzhong ;

Wang, Song ;

Wu, Guisheng .

CATALYSIS COMMUNICATIONS, 2011, 12 (12) :1095-1098

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