粉煤灰基吸附剂合成动力学模型的拟合分析  

STUDY ON KINETIC MODEL OF SYNTHESIS WITH FLY ASH-BASED ADSORBENT

作　　者：徐岩[1,2] 任瑞晨[2] 丁淑芳[1] 

机构地区：[1]黑龙江科技学院资源与环境工程学院,哈尔滨教授150027 [2]辽宁工程技术大学资源与环境工程学院,辽宁阜新硕士生123000

出　　处：《煤炭转化》2009年第3期86-89,共4页Coal Conversion

基　　金：黑龙江省教育厅科学技术研究项目(11511342)

摘　　要：以鸡西矿区粉煤灰为原料,详细研究了合成粉煤灰基吸附剂的方法及其合成动力学模型,分析了不同反应时间内产品的结晶度.通过待定系数法确定出各方程速率常数和整合动力学方程,最终得到用粉煤灰制备粉煤灰基吸附剂的动力学模型.采用模型方程,对实验晶化曲线进行拟合,得到如下结论:粉煤灰基吸附剂结晶反应发生在凝胶后期;此外,在晶化后期,凝胶溶解速率的快慢决定了晶体生长速率和在有限晶化时间内产品结晶度的大小.从整体动力学实验数据来看,能与模型曲线较好地吻合,说明此动力学模型能较好地描述实际晶体生长规律.This article discusses in detail the model of fly ash-based adsorbent with fly ash in Jixi, synthetical method, and synthetical kinetic and then it analyzes crystallization degree of production within the different time. This paper uses the undetermined coefficient method to determine velocity constant of each equation and merge the kinetic equations. Finally, the kinetic model of fly ash-based adsorbent with fly ash was obtained. Then using the model equation to merge testing crystallization curve, conclusions can he drawed that the crystallization reaction of fly ash-based adsorbent will happen in the later gel formation. Furthermore, the dissolve velocity of gel is either quick or slow, which decides the crystal growing rate and the crystallization degree within the limited time. From the whole testing data, it can consist with model curve fairly good, and it shows that the model can describe preferably the growth law of actual crystal.

关 键 词：粉煤灰 粉煤灰基吸附剂 XRD 动力学模型 

分 类 号：TQ424.25[化学工程]