硫化氢与氧气反应制硫

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      ACTIVITY COEFFICIENT MODEL GMUFAC HAS MISSING PARAMETERS:
      UNIFAC GROUP STRUCTURAL INFORMATION PARAMETER, UFGRP (DATA SET 1),
      MISSING FOR COMPONENT S; NO UFGRP PARAMETERS SUPPLIED BY USER;
      DEFAULTS NOT FOUND IN DATA BANK


缺失硫组分参数，怎么办？
如何查找以及添加呢？
麻烦大家帮帮忙，谢谢