Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene
A series of HZSM-5 catalysts with different Si/Al ratio were prepared and characterized with various characteristic methods XRD, BET, NH3-TPD, FT-IR spectra of adsorbed pyridine, etc. The effect of Si/Al ratio of HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-05-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844018371391 |
| _version_ | 1818420367319891968 |
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| author | Xue Yu Bing Liu Yuewei Zhang |
| author_facet | Xue Yu Bing Liu Yuewei Zhang |
| author_sort | Xue Yu |
| collection | DOAJ |
| description | A series of HZSM-5 catalysts with different Si/Al ratio were prepared and characterized with various characteristic methods XRD, BET, NH3-TPD, FT-IR spectra of adsorbed pyridine, etc. The effect of Si/Al ratio of HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene was investigated in detail. It is resulted that the catalytic activities are dependent on the acid strength, decreasing with the ratio of Si/Al increases. The optimized catalyst was HZSM-5 (600) with 8.8% of isobutene conversion and 90.2% of selectivity to isoprene, indicating that the higher Si/Al ratio was termed as appropriate for prins condensation of isobutylene and formaldehyde to isoprene. On the contrary, the low Si/Al ratio may lead to the formation of by-products and coke deposits, which leads the catalysts deactivation. |
| first_indexed | 2024-12-14T12:53:20Z |
| format | Article |
| id | doaj.art-cef247698b9e48cdbd4ab66af01eb380 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-14T12:53:20Z |
| publishDate | 2019-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-cef247698b9e48cdbd4ab66af01eb3802022-12-21T23:00:37ZengElsevierHeliyon2405-84402019-05-0155e01640Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isopreneXue Yu0Bing Liu1Yuewei Zhang2Jilin Institute of Chemical Technology, Jilin, 132022, PR ChinaNational Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, PR ChinaJilin Institute of Chemical Technology, Jilin, 132022, PR China; Corresponding author.A series of HZSM-5 catalysts with different Si/Al ratio were prepared and characterized with various characteristic methods XRD, BET, NH3-TPD, FT-IR spectra of adsorbed pyridine, etc. The effect of Si/Al ratio of HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene was investigated in detail. It is resulted that the catalytic activities are dependent on the acid strength, decreasing with the ratio of Si/Al increases. The optimized catalyst was HZSM-5 (600) with 8.8% of isobutene conversion and 90.2% of selectivity to isoprene, indicating that the higher Si/Al ratio was termed as appropriate for prins condensation of isobutylene and formaldehyde to isoprene. On the contrary, the low Si/Al ratio may lead to the formation of by-products and coke deposits, which leads the catalysts deactivation.http://www.sciencedirect.com/science/article/pii/S2405844018371391Organic chemistryMaterials chemistry |
| spellingShingle | Xue Yu Bing Liu Yuewei Zhang Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene Heliyon Organic chemistry Materials chemistry |
| title | Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene |
| title_full | Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene |
| title_fullStr | Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene |
| title_full_unstemmed | Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene |
| title_short | Effect of Si/Al ratio of high-silica HZSM-5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene |
| title_sort | effect of si al ratio of high silica hzsm 5 catalysts on the prins condensation of isobutylene and formaldehyde to isoprene |
| topic | Organic chemistry Materials chemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2405844018371391 |
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