Catalytic hydrodeoxygenation of biomass-derived oxygenates to bio-fuels over Co-based bimetallic catalysts,Sustainable Energy & Fuels

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Catalytic hydrodeoxygenation of biomass-derived oxygenates to bio-fuels over Co-based bimetallic catalysts
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-06-11 , DOI: 10.1039/d0se00332h
Zhen-Hong He _{1,

2,

3,

4,

5} , Chong-Shan Jiang _{1,

2,

3,

4,

5} , Zhong-Yu Wang _{1,

2,

3,

4,

5} , Kuan Wang _{1,

2,

3,

4,

5} , Yong-Chang Sun _{1,

2,

3,

4,

5} , Man-Qing Yao _{1,

2,

3,

4,

5} , Zhu-Hui Li _{1,

2,

3,

4,

5} , Zhao-Tie Liu _{1,

2,

3,

4,

5}

Affiliation

The rapid consumption of conventional fossil fuels has caused a sharp decline in their reserves and led to climate change. Exploitation of renewable energy sources especially bio-fuels such as 2,5-dimethylfuran (DMF), methylfuran (MF), γ-valerolactone (GVL), etc. has both environmental and economic benefits. In the present work, diverse Co-based bimetallic catalysts were prepared and used for catalyzing hydrodeoxygenation (HDO) of biomass-derived oxygenates. Co₅Zn₁O_x, obtained by the incorporation of Zn species into the Co metal catalyst especially with a Co/Zn molar ratio of 5, could enhance the catalytic performances obviously compared to the sole Co catalyst. For example, the DMF, MF, and GVL yields reached up to 94, 98, and 77% during the catalysis by Co₅Zn₁O_x, which were much greater than 74, 0, and 23% for the Co catalyst, respectively. The enhanced performances of Co₅Zn₁O_x stem from the strong interaction between the Co and Zn species. Specifically, the presence of ZnO could stabilize Co²⁺ species, by offering electrons to Co species and creating oxygen vacancies, resulting in Co₅Zn₁O_x showing the highest adsorption amounts of furfural and furfuryl alcohol compared to Co₁Zn₁O_x and Co₇Zn₁O_x catalysts. Moreover, the catalyst showed good universality and reusability, and the HDO of 5-HMF to DMF proceeded in a true heterogeneous manner. The present work is believed to extend the application of bimetallic catalysts to the synthesis of bio-fuels and utilization of biomass materials.

中文翻译：

钴基双金属催化剂将生物质衍生的含氧化合物催化加氢脱氧为生物燃料

常规化石燃料的快速消费已导致其储量急剧下降，并导致了气候变化。开发可再生能源，特别是生物燃料，例如2,5-二甲基呋喃（DMF），甲基呋喃（MF），γ-戊内酯（GVL）等，具有环境和经济效益。在目前的工作中，制备了多种基于Co的双金属催化剂，并用于催化生物质衍生的含氧化合物的加氢脱氧（HDO）。Co ₅ Zn ₁ O _x与唯一的Co催化剂相比，通过将Zn物种特别是Co / Zn摩尔比为5的Co掺入Co金属催化剂中获得的，可以明显提高催化性能。例如，在Co ₅ Zn ₁ O _x催化期间，DMF，MF和GVL的收率分别达到94％，98％和77％，远高于Co催化剂的74％，0％和23％。。Co ₅ Zn ₁ O _x的增强性能源于Co和Zn物种之间的强相互作用。具体而言，ZnO的存在可以通过向Co物种提供电子并产生氧空位来稳定Co ²⁺物种，从而生成Co ₅ Zn与Co₁ Zn₁ O_x和Co₇ Zn₁ O_x催化剂相比，₁ O_x显示出最高的糠醛和糠醇吸附量。此外，该催化剂显示出良好的通用性和可重复使用性，并且5-HMF转化为DMF的HDO的过程确实是异质的。相信目前的工作将双金属催化剂的应用扩展到生物燃料的合成和生物质材料的利用。

更新日期：2020-06-11

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