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为了进一步提高乙基纤维素(EC)膜的脱硫性能,利用光引发交联反应将丙烯酸酯单体和EC聚合物合成交联EC膜,用红外光谱仪、扫描电镜对该膜的膜结构进行了表征。采用模拟汽油评价了EC膜的脱硫性能,研究了EC质量分数、交联剂质量分数、成膜温度、脱硫温度对EC膜渗透汽化性能的影响。结果表明,随着EC质量分数和交联剂质量分数的增加,硫富集因子和通量均先增大后减小,存在极大值;随着成膜温度和脱硫温度的升高,硫富集因子逐渐降低,通量一直增加。综合考虑两者对汽油脱硫的贡献,选取EC质量分数为18%,交联剂质量分数为21%~22%,成膜温度为50℃,脱硫温度为80℃为最佳脱硫条件。
In order to further improve the desulfurization performance of the ethyl cellulose (EC) film, the cross-linking reaction was used to synthesize the cross-linked EC film with the acrylate monomer and the EC polymer. The film structure of the film was analyzed by infrared spectroscopy and scanning electron microscopy Characterization. The simulated gasoline was used to evaluate the desulfurization performance of EC membrane. The effects of EC mass fraction, crosslinking agent mass fraction, film formation temperature and desulfurization temperature on the pervaporation performance of EC membrane were studied. The results show that the sulfur enrichment factor and flux first increase and then decrease with the increase of EC mass fraction and crosslinking agent mass fraction, and there exists a maximum value. With the increase of film formation temperature and desulfurization temperature, Enrichment factor gradually decreased, the flux has been increasing. Considering their contribution to the desulfurization of gasoline, the optimal desulfurization conditions were selected as follows: the mass fraction of EC was 18%, the mass fraction of crosslinking agent was 21% ~ 22%, the temperature of film formation was 50 ℃ and the desulfurization temperature was 80 ℃.