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REN Sishuai (1993-), male, Master. E-mail: 143446098@qq.com
Outline
Three mordenites with different morphologies (i.e., fiber bundle, regular fiber and flaky) were synthesized via the introduction of cyclohexylamine and hexamethyleneimmonium, respectively. The crystal form, morphology, pore structure and acidity of the samples were characterized by X-ray diffraction and N2 physical adsorption, scanning electron microscopy and NH3 temperature-programmed desorption, and the alkylation performance evaluation and regeneration experiments were carried out. The experimental results show that all three mordenites have a great catalytic activity, and the catalyst life of the flaky mordenite can reach 26 h, which is better than that of the fiber bundle mordenite for 5 h and the regular fibrous mordenite for 3 h. The fiber bundle and regular fibrous mordenites can have a selectivity to 2-substituted linear alkylbenzene of more than 75%, and the product selectivity of flaky mordenite can reach more than 50%, which is superior to the existing technology for linear alkylbenzene production. The catalyst regeneration rate is opposite to the catalyst deactivation rate. The three mordenites with fiber bundle regular fiber and flaky morphologies have the maximum catalytic activities of fresh catalysts after regeneration of 8, 11 h, and 5 h, respectively.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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