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Title: | Olefin oligomerisation over nanocrystalline MFI-based micro/mesoporous zeotypes synthesised via bottom-up approaches |
Author: | Silva, Andreia F. Fernandes, Auguste Antunes, Margarida M. Ribeiro, Maria F. Silva, Carlos M. Valente, Anabela A. |
Keywords: | 1-Butene Oligomerisation Continuous-flow MFI topology Hierarchical zeotypes Hydrothermal synthesis |
Issue Date: | Aug-2019 |
Publisher: | Elsevier |
Abstract: | The oligomerisation of 1-butene was studied under high-pressure continuous-flow conditions (200–250 °C, 30–40 bar), in the presence of micro/mesoporous zeotypes based on the MFI topology, which were prepared via different non-destructive bottom-up strategies: crystallization of silanized protozeolitic units; co-templating with a dual function (polymeric) template; and using a sole structure directing agent (non-surfactant and non-polymeric) to generate mesoporosity. The synthesis method influenced the material properties and consequently the catalytic performance. In targeting hydrocarbons with boiling point ranges characteristics of diesel, the zeotypes benefited from regular morphology, reduced crystallite size, mesoporosity and enhanced molar ratio of Lewis (L) to Brønsted (B) acid sites (L/B). In general, the zeotypes outperformed commercial zeolite ZSM-5. The best-performing zeotype was prepared according to the Serrano strategy based on the crystallization of silanized zeolitic seeds, and led to 97% conversion and an average space-time yield of liquid products of 1077 mg gcat−1 h−1, at 250 °C, 40 bar. The zeotypes seemed more stable than the commercial zeolite, based on molecular level characterization studies of the used/regenerated catalysts, with some differences in catalytic activity. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/37440 |
DOI: | 10.1016/j.renene.2019.02.019 |
ISSN: | 0960-1481 |
Appears in Collections: | CICECO - Artigos DQ - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Olefin oligomerisation over nanocrystalline MFI-based micro.pdf | 3.08 MB | Adobe PDF | View/Open |
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