Venturi, Laura (2021) Variation of temperature and time on stream in the conversion of methanol to hydrocarbons using a catalytic fixed bed reaction. Bachelor's Thesis, Chemical Engineering.
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Abstract
The Methanol to Hydrocarbons reaction was investigated at different reaction temperatures (400°C, 450°C, 500°C) and times on stream (TOS) (2 hours, 4 hours, 6 hours at 450°C) using a home-made setup. The results show a clear influence of the varied variated parameters over product distribution and catalyst coking. The catalyst was analysed using TPD, XRD, N2 physisorption and TGA, which elucidated changes in structure and activity between the pristine and spent samples. It was made clear that higher temperatures lead to faster and more extensive formation of coke, when compared to low-temperature conditions at the same TOS. Coke generation goes to reduce the active surface, volume and acid sites of the catalyst, but does not appear to extensively modify its framework. Gas chromatography was employed in the characterisation of gaseous and liquid products, revealing that at higher temperatures, alkenes and BTX aromatics are preferred over their corresponding alkanes and poly-substituted aromatics. The proposed explanation for the observed changes was identified in hydrocarbon cracking, catalyst coking and dealumination, which can change the selectivity of the final products and the coking processes of the catalyst.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Xie, J. and Yue, J. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 21 Jun 2021 16:14 |
| Last Modified: | 21 Jun 2021 16:14 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/24613 |
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