SiO2-stabilized Ni/t-ZrO2 catalysts with ordered mesopores: one-pot synthesis and their superior catalytic performance in CO methanation

Wang Xiaoyan; Liu Qing; Jiang JiaxingJin GuojingLi HuifangGu FangnaXu GuangwenZhong ZiyiSu Fabing

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SiO2-stabilized Ni/t-ZrO2 catalysts with ordered mesopores: one-pot synthesis and their superior catalytic performance in CO methanation

机译：SiO2-stabilized Ni / t-ZrO2催化剂与命令中孔:合成及其优越在公司甲烷化催化性能

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How to improve both the anti-sintering ability and the anti-coking ability of catalysts is still a big challenge in CO methanation for production of synthetic natural gas. To address the issue, we designed and synthesized a series of multicomponent Ni-Zr and Ni-Si-Zr catalysts with an ordered mesoporous structure by using an improved one-pot evaporation-induced self-assembly method. The results showed that these Ni-Si-Zr catalysts with ordered mesopores exhibit better anti-coking and anti-sintering properties as compared with their counterparts without the ordered mesopores. The superior catalytic performances of Ni-Si-Zr catalysts are attributed to the stronger interaction between the support and Ni particles, the confinement effect of the mesoporous channels as well as the presence of more oxygen vacancies in them. In addition, although the tetragonal ZrO2 (t-ZrO2) supported catalysts exhibited better catalytic performance than the monoclinic ZrO2 (m-ZrO2) supported catalysts under atmospheric pressure conditions, the former experienced severe deactivation in the reaction process, mainly due to the transformation of t-ZrO2 to m-ZrO2. The addition of SiO2 into ZrO2 was proven to be able to effectively hinder this transformation, thus improving the catalyst stability.

机译：如何提高anti-sintering能力和的抗结焦催化剂仍然是一个的能力大公司生产甲烷化的挑战合成天然气。设计并合成了一系列的多组分Ni-Zr和Ni-Si-Zr催化剂通过使用一个有序介孔结构改善锅evaporation-induced自组装的方法。这些Ni-Si-Zr催化剂与有序中孔表现出更好的抗结焦和anti-sintering属性与同行相比有序中孔。Ni-Si-Zr催化剂的催化性能归因于相互作用越强的支持和镍粒子,监禁的影响以及介孔通道更多的氧气的存在空缺。,虽然正方锆(t-ZrO2)支持催化剂表现出更好的催化性能比单斜氧化锆(m-ZrO2)催化剂在大气压力下的支持条件下,前者经历了严重失活在反应过程中,主要是由于m-ZrO2 t-ZrO2的变换。添加二氧化硅为氧化锆是可以证明有效地阻碍了这一转变,因此提高催化剂的稳定性。

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来源
《Catalysis science & technology》 |2016年第10期|3529-3543|共15页
作者
Wang Xiaoyan; Liu Qing; Jiang JiaxingJin GuojingLi HuifangGu FangnaXu GuangwenZhong ZiyiSu Fabing;
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作者单位

Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China;

Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore;

Shaanxi Normal Univ, Sch Mat Sci & Engn, Xian 710062, Shaanxi, Peoples R China;

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正文语种英语
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关键词
Catalysis; Ordered; methanationCatalystsReaction processing;

机译：催化;命令;methanationCatalystsReaction处理;

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SiO2-stabilized Ni/t-ZrO2 catalysts with ordered mesopores: one-pot synthesis and their superior catalytic performance in CO methanation

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