(488g) Preparation of Metal Ion Modified ETS-4 Molecular Sieve with High Adsorption Performance

Preparation of metal ion
modified ETS-4 molecular sieve with high adsorption performance

Liyun Song¹, Hongxing
Dai¹,Jian Li¹, Yongling
Li², Yingshu Liu²*, Hong He¹*

¹College
of Environmental and Energy Engineering,

Beijing
University of Technology, Beijing
100124,
China

²University
of Science and Technology Beijing,

30, Beijing, 100083,
China

Key words: ETS-4, adsorption, PSA

Abstract

ETS-4
had attracted more and more attentions for many researchers because of its
potential properties in adsorption, mixed gas separation, and catalysis, which
has octahedral-tetrahedral structure with the potential properties that were different
from the conventional zeolite materials^[1].
The preparation and crystallization of ETS-4 with small pores had been reportedby many researchers^[2-4]. In
this paper, titanosilicate ETS-4 sieves with the Sr and Ni modification were prepared by hydrotherrmal
method using the titanium trichloride and tetraethoxysilane as the precursors. The properties and morphology
of the materials were also characterized by XRD, SEM and PSA techniques. The Sr and Ni
doping could improve the N₂ and CH₄ adsorption capacity
of ETS-4. The N₂ and CH₄adsorbance
increased in the pressurization process for ETS-4-Sr and ETS-4-Ni, but no
significant change in N₂ and CH₄ adsorbance
with the pressure increasing was observed over the ETS-4 sample. At the pressure
of 1200 mmHg, the N₂adsorbances for ETS-4-Sr
and ETS-4-Ni were 4.2 and 3.9 times as that of ETS-4 sieve, respectively. Summary,
the metal ion doping (Sr²⁺ and Ni²⁺) can improve the
adsorption performance of ETS-4 greatly.

Reference

[1]Sankar Nair. Chem. Mater. 2001, 13,4247-4254

[2] S.M. Kuznicki. Nature. 2001, 412, 720-724

[3] B. Majumdar. Ind.
Eng.Chem. Res. 2011,
50, 3021¨C3034

[4] Moises L. Pinto. J.
Am. Chem. Soc. 2011, 133, 6396¨C6402