用改进的时间域曲线拟合法求取催化剂上的传递和吸附系数

Evaluation of Transport and Adsorption Coefficientsof Porous Catalyst in Fixed-bed Reactors byImproved Curve Fitting in Time Domain

本文用单纯形法进行多维搜索的最优化方法来完成富里埃分析和时间域拟合的计算,从而使Boersma-Klein等的方法得到简化,并把它的应用推广到吸附体系,测定了H_2在国产C301合成甲醇催化剂上的五个传递和吸附系数.此外,本文还讨论了这一方法的优点和应用这一方法时谐波次数和周期的选择等问题.

Boersma-Klein and Moulijn evaluated the transport coefficients of non-adsorption system by a new method-the improved curve fitting domain. in time which combines Fourier analysis with the traditional curve fitting in time domain, and substitutes the error map plotting with a set of computer program of linear and non-linear regression. In this paper, the calculations of Fourier analysis and the curve fitting in time domain are based on the simplex method of polydimensional search technique, which means the simplification of the work of Boersma-Klein et al. Moreover, the application of the improved curve fitting in time domain is extended to adsorption system, and five transport and adsorption coefficients of domestic C301 methanol synthesis catalyst in fixed-bed reactors are obtained. The advantages of this method and the selection of harmonic number and period for its use are also discussed.