Supercritical water synthesis of bimetallic catalyst and its application in hydrogen production by furfural gasification in supercritical water
Supercritical water synthesis of bimetallic catalyst and its application in hydrogen production by furfural gasification in supercritical water
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双金属催化剂的超临界水合成及其在超临界水糠醛气化制氢中的应用
DOI：
10.1016/j.iihydene.2016.10.096
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发表时间：
2017-02
影响因子：
7.2
通讯作者：
Guo Liejin
中科院分区：
文献类型：
--
作者：
Jin Hui;Zhao Xiao;Su Xiaohui;Zhu Chao;Cao Changqing;Guo Liejin
超临界水不仅为生物质气化提供了良好的溶剂，而且会导致催化剂团聚。因此，采用超临界水合成方法来保证催化剂的稳定性。为了兼顾不同金属催化剂的优点，以TiO2为载体，制备了Ni、Co、Zn、Cu四种金属催化剂。采用不同的催化剂对糠醛在超临界水中气化制氢进行了研究。实验结果表明，除Co + Ni组合外，其它组合均表现出显著的稳定性。Zn + Ni和Cu + Zn具有较好的氢气选择性，Co + Ni具有较好的碳气化效率。与K2CO3催化剂反应后得到的焦炭颗粒为球形，而与K2CO3催化剂反应后得到的焦炭颗粒为无定形。
Supercritical water not only provides good solvent of biomass gasification but also causes catalyst agglomeration. Therefore, the supercritical water synthesis method was utilized to guarantee the stability of the catalyst. In order to take into account the advantages of different metal catalysts, bimetallic catalysts were prepared based on Ni, Co, Zn and Cu, with TiO2as carrier. Hydrogen production by furfural gasification in supercritical water was conducted with different catalysts. The experimental results turned out that all combinations showed remarkable stability except for the combination Co + Ni. Zn + Ni and Cu + Zn showed better selectivity on hydrogen, and Co + Ni showed better carbon gasification efficiency. Spherical coke particles were obtained after the reaction with bimetallic catalysts, while the coke particles were amorphous after the reaction with K2CO3.
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