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氯铂酸在改性氧化铝上的吸附

THE ADSORPTION OF H_2PtCl_6 ON MODIFIED ALUMINA
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摘要 在动态和平衡条件下,研究了H_2PtCl_6在各种氧化铝载体上的吸附.红外光谱和紫外可见漫反射谱用于表征浸渍H_2PtCl_6前后载体的表面性质.结果表明,H_2PtCl_6在载体上的吸附量取决于氧化铝的Lewis酸性.当载体具有很高的吸附活性时,吸附速率与载体表面性质无关,但受控于孔道扩散.从表面活性羟基变化的角度,探讨了吸附量与酸性的关系. The dynamic and equilibrium adsorption of H_2PtCl_6 on various aluminas were studied,and IRS and UV-Vis.DRS were used to characterizet hese supports before and after impregnation with H_2PtCl_6 solution.The data indicated that the uptake of H_2PtCl_6 on supports strongly depends on the Lewis acidity of alumina and that the rate of adsorption of supports with high adsorption capacity is controlled by pore diffusion.Relationships between uptake and acidity were interpreted in terms of active hydroxyl groups on aluminas.
出处 《石油学报(石油加工)》 EI CAS CSCD 北大核心 1990年第4期1-7,共7页 Acta Petrolei Sinica(Petroleum Processing Section)
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