Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34.
| dc.contributor.author | van Niekerk, M | |
| dc.contributor.author | Fletcher, J | |
| dc.contributor.author | O'Connor, C | |
| dc.date.accessioned | 2016-07-29T10:30:22Z | |
| dc.date.available | 2016-07-29T10:30:22Z | |
| dc.date.issued | 1996 | |
| dc.date.updated | 2016-07-28T13:19:26Z | |
| dc.description.abstract | The catalytic activity and selectivity of as-prepared and modified samples of SAPO-34 and Me-APSO-34 (Me = Co, Ni) for the conversion of methanol to olefins has been investigated. The catalytic performance for the conversion of methanol to light olefins of all the catalyst samples prepared was found to be closely related to the number of strong acid sites present. Mild steaming, encountered during deep-bed calcination, increased the lifetime of SAPO-34 due to the formation of stronger acid sites probably on the external surface of the crystallites. Selectivities to light olefins were typical of those previously reported and was essentially constant for all the catalysts investigated. The absence of C5+ olefins is ascribed to the ‘cage effect’. Dilution of the methanol with water as opposed to nitrogen increased the catalyst utilization value threefold and reduced the rate of coke formation during reaction. Treatments such as steaming, silanization and poisoning of strong sites by ammonia all reduced the number of strong acid sites and, thus, reduced catalytic performance. | en_ZA |
| dc.identifier | http://dx.doi.org/10.1016/0926-860X(95)00240-5 | |
| dc.identifier.apacitation | van Niekerk, M., Fletcher, J., & O'Connor, C. (1996). Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34. <i>Applied Catalysis A: General</i>, http://hdl.handle.net/11427/21023 | en_ZA |
| dc.identifier.chicagocitation | van Niekerk, M, J Fletcher, and C O'Connor "Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34." <i>Applied Catalysis A: General</i> (1996) http://hdl.handle.net/11427/21023 | en_ZA |
| dc.identifier.citation | van Niekerk, M. J., Fletcher, J. C., & O'Connor, C. T. (1996). Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34. Applied Catalysis A: General, 138(1), 135-145. | en_ZA |
| dc.identifier.issn | 0926-860X | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - van Niekerk, M AU - Fletcher, J AU - O'Connor, C AB - The catalytic activity and selectivity of as-prepared and modified samples of SAPO-34 and Me-APSO-34 (Me = Co, Ni) for the conversion of methanol to olefins has been investigated. The catalytic performance for the conversion of methanol to light olefins of all the catalyst samples prepared was found to be closely related to the number of strong acid sites present. Mild steaming, encountered during deep-bed calcination, increased the lifetime of SAPO-34 due to the formation of stronger acid sites probably on the external surface of the crystallites. Selectivities to light olefins were typical of those previously reported and was essentially constant for all the catalysts investigated. The absence of C5+ olefins is ascribed to the ‘cage effect’. Dilution of the methanol with water as opposed to nitrogen increased the catalyst utilization value threefold and reduced the rate of coke formation during reaction. Treatments such as steaming, silanization and poisoning of strong sites by ammonia all reduced the number of strong acid sites and, thus, reduced catalytic performance. DA - 1996 DB - OpenUCT DP - University of Cape Town J1 - Applied Catalysis A: General LK - https://open.uct.ac.za PB - University of Cape Town PY - 1996 SM - 0926-860X T1 - Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34 TI - Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34 UR - http://hdl.handle.net/11427/21023 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/21023 | |
| dc.identifier.vancouvercitation | van Niekerk M, Fletcher J, O'Connor C. Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34. Applied Catalysis A: General. 1996; http://hdl.handle.net/11427/21023. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | Elsevier | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.rights | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | en_ZA |
| dc.source | Applied Catalysis A: General | en_ZA |
| dc.source.uri | http://www.journals.elsevier.com/applied-catalysis-a-general/ | |
| dc.subject.other | SAPO-34 | |
| dc.subject.other | Methanol | |
| dc.subject.other | Alkenes | |
| dc.title | Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34. | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |