Citation: Xue Mei Liao, Wei Chu, Yang Li, Fu Dong Zhou, Shi Zhong Luo. Effects of support pore size on new Cs_2.5H_0.5PW₁₂O₄₀/SiO₂ catalysts for the ring-opening polymerization of tetrahydrofuran[J]. Chinese Chemical Letters, ;2009, 20(3): 344-347. doi: 10.1016/j.cclet.2008.11.032 shu

Effects of support pore size on new Cs_2.5H_0.5PW₁₂O₄₀/SiO₂ catalysts for the ring-opening polymerization of tetrahydrofuran

Xue Mei Liao ^a, ,
Wei Chu ^a ,
Yang Li ^a,b ,
Fu Dong Zhou ^a ,
Shi Zhong Luo ^a

a Department of Chemical Engineering, Sichuan University, Chengdu 610065, China;
b Research Institute of Natural Gas Technology, Petrochina Southwest Oil and Gas Field Company, Chengdu 610213, China

Received Date: 2 September 2008

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 20776089).

Mesoporous silica supported Cs_2.5H_0.5PW₁₂O₄₀ catalysts were prepared by impregnation method, and several silica supports with different pore size were utilized. N₂ adsorption, XRD and ICP-AES techniques were utilized to characterize the silica supports and catalysts. XRD results showed that the dispersion of Cs_2.5H_0.5PW₁₂ was better for the silica support with larger pore size. The catalytic activity results showed that the pore size played important role on the catalyst activity and the molecular weight of PTHF.When Cs_2.5H_0.5PW₁₂O₄₀ was dispersed on larger pore size silica support, the catalysts showed good performances for the synthesis of PTHF. The molecular weight of PTHF product on the sample in which Cs_2.5H_0.5PW₁₂O₄₀ was dispersed on larger pore support was higher than that on the catalyst with smaller pore support. The leaching amounts of the active components for the supported Cs_2.5H_0.5PW₁₂O₄₀ catalysts were much lower. After five reaction cycles, there were still good activities and stabilities for the supported Cs_2.5H_0.5PW₁₂O₄₀ catalysts with larger pore silica supports. These results were much better than those of the supported heteropolyacid H₃PW₁₂O₄₀ catalyst.
- PTHF synthesis,
- Cs_2.5H_0.5PW₁₂O₄₀catalysts,
- Mesoporous silica,
- Pore size,
- Stability
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