S Zorb吸附剂颗粒活性位分布对汽油脱硫率的影响

发布时间：2018-10-17 08:06

【摘要】：采用固定床微型反应器,考察了S Zorb吸附剂的脱硫规律。脱硫率的历史曲线表明,脱硫速率与汽油的硫质量分数符合一级反应的关系,且脱硫速率常数与吸附剂颗粒未占据活性位的量呈线性关系。中型实验时,不同吸附剂颗粒的持硫量相同,吸附剂颗粒的活性位近似呈Delta分布;而工业过程中,不同吸附剂颗粒的持硫量不同,其活性位呈其他的分布形式,吸附剂颗粒活性位分布形式的不同使中型实验的脱硫率与工业脱硫率存在差异。将一阶动力学方程应用于离析模型,建立了任意概率分布函数时脱硫率的表达式。在平均持硫量相同的条件下,吸附剂颗粒活性位呈Delta分布时的脱硫率小于吸附剂活性呈其他分布时的脱硫率,并得到了差值表达式。将固定床微型反应器得到的初始脱硫速率常数应用于脱硫率的差值表达式,对于不同有限区间内的活性位正态概率密度分布,平均持硫量越小、分布区间越宽,中型实验的脱硫率与工业脱硫率的差值越大。
[Abstract]:The desulphurization rule of S Zorb adsorbent was investigated in a fixed bed microreactor. The history curve of desulfurization rate shows that the desulfurization rate is in accordance with the first order reaction and the desulfurization rate constant is linear with the amount of adsorbent particles not occupying the active site. In medium scale experiments, the sulfur holdup of different adsorbent particles is the same, the active sites of adsorbent particles are approximately Delta distribution, but in the industrial process, the sulfur holdup of different adsorbent particles is different, and the active sites of different adsorbent particles are distributed in other forms. The different distribution of active sites of adsorbent particles resulted in the difference of desulfurization rate between medium scale experiment and industrial desulfurization rate. The first order kinetic equation is applied to the dissociation model, and the expression of desulphurization rate for arbitrary probability distribution function is established. Under the condition of the same average sulfur holding capacity, the desulfurization rate of adsorbent particles with Delta distribution is lower than that of adsorbent activity with other distribution, and the difference expression is obtained. The initial desulphurization rate constant obtained from a fixed bed microreactor is applied to the difference expression of desulfurization rate. For the normal probability density distribution of active sites in different finite ranges, the smaller the average sulfur holdup is, the wider the distribution range is. The difference between the desulphurization rate and the industrial desulfurization rate is larger.
【作者单位】：中国石化石油化工科学研究院;
【分类号】：TE624.55

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