首页> 外文OA文献 >Kinetics of wet oxidation of phenol over an Fe/activated carbon catalyst
【2h】

Kinetics of wet oxidation of phenol over an Fe/activated carbon catalyst

机译:Fe /活性炭催化剂上苯酚湿式氧化的动力学

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Wet oxidation of phenol over an Fe/activated carbon catalyst has been studied in a trickle-bed reactor in the following operational window: inlet C phenol=0.5 and 1 g/L, T=100-127 ºC, PT=3-8 atm, W=0-4.8 g, QL=0.125-2 mL/min and QO2=91.6 NmL/min. The experiments were carried out in the absence of mass transfer limitations. Oxidation and mineralization reactions of phenol are proven to take place on the catalyst surface through a heterogeneous mechanism. Due to the complexity of the phenol oxidation route, simple reaction schemes have been assumed by lumping the intermediate species and generalized kinetic models for phenol and TOC abatement have been proposed. Two kinetic expressions, a power law rate and a Langmuir-Hinshelwood type rate expression, have been considered but only a convergence with statistically reliable parameters was found for the former model. A power law model with first order for phenol and 0.74 for oxygen and apparent activation energy of 74 kJ/mol described the experimental results in the oxidation of phenol well. Mineralization of phenol (TOC abatement) was described by a similar rate expression and takes into account the presence of refractory species such as the low molecular weight acids formed upon phenol oxidation.
机译:在滴流床反应器中,在以下操作窗口中研究了苯酚在铁/活性炭催化剂上的湿式氧化:入口C苯酚= 0.5和1 g / L,T = 100-127ºC,PT = 3-8 atm ,W = 0-4.8 g,QL = 0.125-2 mL / min,QO2 = 91.6 NmL / min。实验在没有传质限制的情况下进行。苯酚的氧化和矿化反应被证明是通过异质机理在催化剂表面发生的。由于苯酚氧化路线的复杂性,通过对中间物种进行集聚,已经提出了简单的反应方案,并提出了用于苯酚和减少TOC的通用动力学模型。已经考虑了两个动力学表达式,即幂律速率和Langmuir-Hinshelwood型速率表达式,但是对于前一个模型,只发现了具有统计可靠参数的收敛性。以苯酚为一阶,氧为0.74且表观活化能为74 kJ / mol的幂律模型描述了苯酚井氧化的实验结果。苯酚的矿化(减少TOC)用相似的速率表达法来描述,并考虑了难熔物质的存在,例如在苯酚氧化时形成的低分子量酸。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号