Synthesis and characterization of core-shell Beta/MCM-22 micro-microporous composite zeolites

ZHANG Pei-shan; MA Bo; YANG Wei-ya; LING Feng-xiang; SHEN Zhi-qi; WANG Shao-jun; HOU Yu-xin

Volume 42 Issue 10

Oct. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(10): 1240-1245

ZHANG Pei-shan, MA Bo, YANG Wei-ya, LING Feng-xiang, SHEN Zhi-qi, WANG Shao-jun, HOU Yu-xin. Synthesis and characterization of core-shell Beta/MCM-22 micro-microporous composite zeolites[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1240-1245.

Citation:

ZHANG Pei-shan, MA Bo, YANG Wei-ya, LING Feng-xiang, SHEN Zhi-qi, WANG Shao-jun, HOU Yu-xin. Synthesis and characterization of core-shell Beta/MCM-22 micro-microporous composite zeolites[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1240-1245.

Citation:

ZHANG Pei-shan, MA Bo, YANG Wei-ya, LING Feng-xiang, SHEN Zhi-qi, WANG Shao-jun, HOU Yu-xin. Synthesis and characterization of core-shell Beta/MCM-22 micro-microporous composite zeolites[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1240-1245.

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Synthesis and characterization of core-shell Beta/MCM-22 micro-microporous composite zeolites

1.
Institute of Chemistry and Material Science, Liaoning University of Petroleum & Chemical Technology, Fushun 113001, China;
2.
Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China;
3.
China Petroleum Fushun Petrochemical Co, Fushun 113004, China

Received Date: 2014-04-25
Rev Recd Date: 2014-07-03
Publish Date: 2014-10-30

Abstract

Abstract

With Beta zeolite as the core crystals, core-shell Beta/MCM-22 composite zeolites with uniform morphology were synthesized by a two-step hydrothermal method. The composite zeolites were characterized by XRD, SEM, TEM, N₂-adsorption and FT-IR. The results showed the composite zeolites exhibit uniform structured morphology; Beta and MCM-22 zeolites act as core and shell, respectively. The pore structure of Beta/MCM-22 composite zeolites was between those of MCM-22 and Beta zeolites. The amounts of medium acidic sites and brnsted acidic sites are increased markedly (C_B/C_L = 13.80) in the composite zeolites. The surface energy, Si-OH groups and surficial positive charges of Beta zeolites are enriched through Ar-H₂ plasma surface treatment, which contributes to the formation of uniform core-shell Beta/MCM-22 composite zeolites.
- Beta,
- MCM-22,
- core-shell structure,
- composite zeolites,
- plasma

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References(20)

References

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