Catalytic synthesis of anisole over LDHs with different Mg/Al ratios

Zhang Haiyong; Zhang Lu; Liu Zhipan; Liu Siqi; Cui Yuhong

doi:10.19606/j.cnki.jmst.2021.06.015

Volume 6 Issue 6

Nov. 2021

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Article Navigation > Journal of Mining Science and Technology > 2021 > 6(6): 755-763

Zhang Haiyong, Zhang Lu, Liu Zhipan, Liu Siqi, Cui Yuhong. Catalytic synthesis of anisole over LDHs with different Mg/Al ratios[J]. Journal of Mining Science and Technology, 2021, 6(6): 755-763. doi: 10.19606/j.cnki.jmst.2021.06.015

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Catalytic synthesis of anisole over LDHs with different Mg/Al ratios

doi: 10.19606/j.cnki.jmst.2021.06.015

1.
School of Chemical and Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
2.
Coal Energy Saving Technology Co.Ltd, Beijing 100013, China

Received Date: 2021-02-04
Rev Recd Date: 2021-04-07
Publish Date: 2021-12-01

Abstract

Abstract

A series of layered hydroxides(LDHs)with different Mg/Al ratios were synthesized by coprecipitation method.MgAl LDHs and their calcined products were characterized by XRD, SEM, FT-IR, NH₃-TPD, CO₂- TPD, TG and ICP-OES, and were used to catalyze the vapor phase synthesis of anisole from phenol and dimethyl carbonate(DMC).The results show that MgAl LDHs synthesized by coprecipitation method have good hydrotalcite like structure when Mg/Al ratio is 2 to 4, mainly in the form of spherical lamellar aggregates.The interlayer spacing, average pore size and alkali acid ratio increase gradually when Mg/Al ratio is from 2 to 4.It is found that the selectivity of anisole first increases and then decreases with the acid-base ratio of the catalyst.The highest anisole selectivity of 88.93 % is achieved when the Mg/Al ratio is 4 and the acid/base ratio is 0.32.In addition, the effect of reaction temperature and mass space velocity on the catalytic performance are also investigated.
- hydrotalcite,
- phenol,
- anisole,
- coprecipitation method,
- Mg/Al ratio

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References

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Catalytic synthesis of anisole over LDHs with different Mg/Al ratios

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