Modification and sequential treatment of EU-1 zeolite in mild alkali and alkaline-acid conditions

Xiaofeng Li; Xiaotao Sun; Yanting Zhang; Junliang Zhang; Pengchao Ren; Xiaozhen Liu; Tao Dou

doi:10.1016/j.cjche.2016.08.020

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Modification and sequential treatment of EU-1 zeolite in mild alkali and alkaline-acid conditions

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Modification and sequential treatment of EU-1 zeolite in mild alkali and alkaline-acid conditions
- Chinese Journal of Chemical Engineering Vol. 24, Issue 12, Pages: 1728-1734(2016)
- Affiliations：
  
  1. Research Institute of Special Chemicals, Taiyuan University of Technology,Taiyuan,China,030024
  2. Key Laboratory of Catalysis of CNPC, China University of Petroleum-Beijing, Changping,Beijing,China,102249
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.08.020
  CLC：
- Published：2016
- Accepted：
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Xiaofeng Li, Xiaotao Sun, Yanting Zhang, Junliang Zhang, Pengchao Ren, Xiaozhen Liu, Tao Dou. Modification and sequential treatment of EU-1 zeolite in mild alkali and alkaline-acid conditions[J]. , 2016, 24(12): 1728-1734.
DOI：

Xiaofeng Li, Xiaotao Sun, Yanting Zhang, Junliang Zhang, Pengchao Ren, Xiaozhen Liu, Tao Dou. Modification and sequential treatment of EU-1 zeolite in mild alkali and alkaline-acid conditions[J]. , 2016, 24(12): 1728-1734. DOI： 10.1016/j.cjche.2016.08.020.

摘要

Abstract

EU-1 zeolites were sequentially treated with low-concentration sodium carbonate (Na

) and hydrochloric acid (HCl) solutions. The obtained samples were characterized by X-ray diffraction (XRD)

scanning electron microscopy (SEM)

adsorption/desorption

temperature programmed desorption of NH

(NH

-TPD)

solid state

Al nuclear magnetic resonance (

Al NMR)

and the catalytic performances of the treated samples were tested in the xylene isomerization reaction. The results showed that the external surface area and mesoporous volume of the sample sequentially treated with 0.05 mol·L

-1

and 0.1 mol·L

-1

HCl solutions reached 73.9 m

·g

-1

and 0.162 cm

·g

-1

respectively. The catalytic performances of EU-1 zeolites were significantly improved

that the activity of the probe reaction increased from 23.03% to 23.61% and the selectivity increased from 85.09% to 87.14% compared with those of parent sample. Furthermore

it was found that only amorphous silica and alumina species was dissolved during the post-tr

eatment process

but the framework structure and the acidic properties of EU-1 zeolite remained intact.

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