COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE UNDER in situ SUPPORTED RARE EARTH TERNARY CATALYST
文献类型：期刊论文
| 作者 | Lu HW ; Qin YS ; Wang XH ; Zhao XJ ; Wang FS |
| 刊名 | acta polymerica sinica
 |
| 出版日期 | 2012 |
| 期号 | 4页码:446-452 |
| 关键词 | CYCLOHEXENE OXIDE CO-POLYMERIZATION EPOXIDES DISCOVERY |
| ISSN号 | 1000-3304 |
| 通讯作者 | lu hw |
| 中文摘要 | copolymerization of propylene oxide and carbon dioxide to form poly (propylene carbonate) was carried out under in-situ gamma-al2o3 supported rare earth ternary catalyst. two in situ supporting routes were employed, one was dropping znet2 into gamma-al2o3 pre-supported y(ccl3oo)(3)-glycerin system (y(ccl3oo)(3)-glycerin/gamma-al2o3/znet2), the other was reacting gamma-al2o3 pre-supported znet2 with y (ccl3oo)(3)-glycerin system (znet2/gamma-al2o3/y (ccl3oo)(3)-glycerin). however, the two supported catalysts showed unexpected 24% similar to 36% lower catalytic activity than their unsupported analog. by monitoring the ethane evolution during catalyst preparation, it was observed that the diffusion of three components of rare earth ternary catalyst into pores of gamma-al2o3 leading to molar ratio disparity of the components and decrease in number of active species, and subsequently loss of the catalytic activity. moreover, the surface hydroxyl groups react with znet2 forming low active species, also leading to catalytic activity loss. therefore, two main factors were proposed for improving the catalytic activity of supported catalysts, one was the activity of the active species, the other was the number of active species. by adjusting the molar ratio of three components, the time for grinding-stirring during supporting process, the active species of the in situ supported catalyst, the surface chemistry of the support, the catalytic activity of the supported catalyst may be improved significantly,a state-of-the-art optimal catalytic activity for the in situ supported catalyst showed 3, 5% increase over the unsupported analog. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 中文 |
| WOS记录号 | WOS:000302930400015 |
| 公开日期 | 2013-05-22 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/48210]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Lu HW,Qin YS,Wang XH,et al. COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE UNDER in situ SUPPORTED RARE EARTH TERNARY CATALYST[J]. acta polymerica sinica,2012(4):446-452. |
| APA | Lu HW,Qin YS,Wang XH,Zhao XJ,&Wang FS.(2012).COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE UNDER in situ SUPPORTED RARE EARTH TERNARY CATALYST.acta polymerica sinica(4),446-452. |
| MLA | Lu HW,et al."COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE UNDER in situ SUPPORTED RARE EARTH TERNARY CATALYST".acta polymerica sinica .4(2012):446-452. |
入库方式： OAI收割
来源：长春应用化学研究所
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