Study on aldol condensation of acetic acid with formaldehyde to acrylic acid over TiO<sub>2</sub> modified VPO

HUANG Bo-ya; GUO He-qin; JIA Li-tao; XIAO Yong; LI De-bao; ZHANG Jian-li

doi:10.19906/j.cnki.JFCT.2022036

Volume 50 Issue 10

Oct. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(10): 1351-1360

HUANG Bo-ya, GUO He-qin, JIA Li-tao, XIAO Yong, LI De-bao, ZHANG Jian-li. Study on aldol condensation of acetic acid with formaldehyde to acrylic acid over TiO2 modified VPO[J]. Journal of Fuel Chemistry and Technology, 2022, 50(10): 1351-1360. doi: 10.19906/j.cnki.JFCT.2022036

Citation:

HUANG Bo-ya, GUO He-qin, JIA Li-tao, XIAO Yong, LI De-bao, ZHANG Jian-li. Study on aldol condensation of acetic acid with formaldehyde to acrylic acid over TiO₂ modified VPO[J]. Journal of Fuel Chemistry and Technology, 2022, 50(10): 1351-1360. doi: 10.19906/j.cnki.JFCT.2022036

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Study on aldol condensation of acetic acid with formaldehyde to acrylic acid over TiO₂ modified VPO

doi: 10.19906/j.cnki.JFCT.2022036

HUANG Bo-ya^{1, 2
,},
GUO He-qin^{1
,
,},
JIA Li-tao^{1, 3},
XIAO Yong¹,
LI De-bao^{1, 3},
ZHANG Jian-li⁴

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Dalian National Laboratory for Clean Energy, Dalian, 116023, China
4.
State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China

Received Date: 2022-02-28
Accepted Date: 2022-04-05
Rev Recd Date: 2022-04-02

Available Online: 2022-05-05

Publish Date: 2022-10-31

Abstract

Abstract

A class of TiO₂ modified VPO catalysts were prepared by organic solvent-heating method in the present work. The catalysts were characterized by TEM, XRD, XPS, NH₃-TPD and CO₂-TPD techniques. The catalytic performances were evaluated in the aldol condensation of acetate acid and formaldehyde to acrylic acid in a fixed-bed reactor. The results show that the addition of TiO₂ significantly changes the proportion of V content forming V⁵⁺ and V⁴⁺ ion pair to total V with the unmodified VPO catalyst. As the precursor of TiO₂ is rutile phase and Ti/V molar ratio is 2.0, the proportion of V content forming V⁵⁺ and V⁴⁺ ion pair to total V reaches the maximum, resulting in the best acrylic acid yield (18.0%) and acrylic acid space-time yield (6.61 mmol/(g·h)). It indicates that for the VPO catalyst modified by TiO₂, the redox cycle of V⁵⁺ and V⁴⁺ ion pair plays a major role in the catalytic reaction of formaldehyde and acetate acid to acrylic acid.
- TiO₂ modified VPO catalysts,
- aldol condensation,
- acrylic acid

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References(25)

References

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