Pd(II)-Cu(II)液相催化氧化净化磷化氢的动力学实验
首发时间:2008-12-09
摘要:传统的净化方法难以实现低成本、高效、选择性净化含磷化氢尾气,这限制了含磷化氢尾气的资源化技术的实现。利用自主筛选的催化剂,在实验室进行了Pd2+浓度、Cu2+浓度、反应温度、混和气氧浓度、磷化氢浓度、混合气流速等因素对Pd(II)-Cu(II)水溶液净化含磷化氢气体影响研究。实验结果表明Pd(II)-Cu(II)催化剂在低温(22~73℃)、常压(1atm)对850mg/m3磷化氢气体净化效率可高达100%。并且催化剂稳定性随催化氧化反应温度的升高而降低,随被净化混和气中氧浓度、吸收液中Pd2+浓度及Cu2+浓度增大而增强;催化氧化净化效率随混和气中PH3浓度升高而降低,随被净化的混和气流速降低而升高。
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Kinetics of the Pd(Ⅱ)-Cu(Ⅱ) Catalyzed Oxidation of Phosphine in Aqueous Solution
Abstract:Traditional methods for purifying low concentration phosphine were always costly or low-efficient, and this limited the resourcelization of gases which containing phosphine. By testing the effect of factors such as Pd2+ concentration, Cu2+ concentration, temperature, the velocity of inflow, oxygen concentration and phosphine concentration on purification efficiency, the kinetics of Pd(II)—Cu(II) catalyzed oxidation of phosphine was investigated. The experimental results showed that at low temperature(22~73℃) and under normal pressure, the purification efficiency could reach 100%; And it also showed that the reactivity and stability of the catalyst improved with decreasing reaction temperature and increasing concentration of oxygen, Pd2+ and Cu2+. And purification efficiency improved when phosphine concentration and the velocity of inflow were lower.
Keywords: catalytic oxidation transition metallic ion phosphine purification
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