Pieke, Loek (2021) Phosphorus addition to ZSM-5 zeolite in the methanol to hydrocarbons (MTH) process using a fixed-bed reactor. Bachelor's Thesis, Chemical Engineering.
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Abstract
Phosphorus modified ZSM-5 (Si/Al = 23) catalyst samples were synthesized using the incipient wetness impregnation method and the acid reflux method. Structural and characteristic effects of phosphorus modification were analyzed by x-ray diffraction, nitrogen physisorption and ammonia temperature programmed desorption. The performances of the catalyst samples in the methanol to hydrocarbons process were studied by analyzing gas and liquid products using gas chromatography. Coke formation on the spent catalyst was analyzed using thermogravimetric analysis. The obtained results indicated that phosphorus addition increases catalytic performance by increasing olefin and para-xylene selectivity and decreasing the production of aromatic byproducts. It was also found that phosphorus addition significantly increases the catalyst durability by decreasing coke formation. By comparing the two treatment methods, it was found that even though it is more expensive and time consuming, the acid reflux method is more reliable than the incipient impregnation method.
| 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 16:16 |
| Last Modified: | 21 Jun 2021 16:16 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/24617 |
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