Y-Mg-Al-F催化剂用于1,1,1,2-四氟乙烷裂解制备三氟乙烯

doi:10.3724/SP.J.1095.2014.30338

摘要/Abstract

摘要： 采用沉积沉淀法制备了Y-Mg-Al-F催化剂，应用XRD、NH3-TPD和Raman光谱等技术手段对催化剂进行表征，并与AlF3催化剂作比较，且将催化剂应用于四氟乙烷(HFC-134a)裂解制备三氟乙烯反应中。结果表明，1100 ℃焙烧的Y-Mg-Al-F催化剂具有较高的活性和反应稳定性。反应温度400 ℃时，四氟乙烷转化率大于25%。催化剂表面酸性和积碳是影响催化剂活性和稳定性的主要因素。

关键词: 四氟乙烷, 催化裂解, 三氟乙烯, 沉积沉淀法, Y-Mg-Al

Abstract: A series of Y-Mg-Al-F catalysts was prepared by the deposition-precipitation method, and characterized by X-ray diffraction(XRD), NH3-TPD(temperature-programmed desorption) and Raman spectroscopy. The catalysts were used in catalytic pyrolysis of 1,1,1,2-tetrafluoroethane(HFC-134a) to trifluoroethylene(TrFE). Their catalytic performances were compared with AlF3 catalyst. The results show that the Y-Mg-Al-F catalyst calcined at 1100 ℃ exhibits higher activity and stability than others. The conversion of HFC-134a is higher than 25% at a reaction temperature of 400 ℃. The surface acidity and carbon deposits on the catalyst surface have main effects on the catalytic activity and stability of catalysts.

Key words: tetrafluoroethane, catalysis pyrolysis, trifluoroethylene, deposition-precipitation, Y-Mg-Al

中图分类号:

O643.3

赵洋, 蔚辰刚, 周强, 吴周安, 王树华, 罗孟飞. Y-Mg-Al-F催化剂用于1,1,1,2-四氟乙烷裂解制备三氟乙烯[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30338.

ZHAO Yang1, YU Chengang1, ZHOU Qiang2, WU Zhouan2, WANG Shuhua2, LUO Mengfe1*. Performance of Y-Mg-Al-F Catalysts for Catalytic Pyrolysis of 1,1,1,2-Tetrafluoroethane to Trifluoroethylene[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30338.

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