Kinetic simulation of oxidative coupling of methane over perovskite catalyst by genetic algorithm:Me

来源 :天然气化学(英文版) | 被引量 : 0次 | 上传用户:zhongjcrazytbag
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The reaction kinetics of oxidative coupling of methane catalyzed by perovskite was studied in a fixed bed flow reactor.At atmospheric pressure,the reactions were carried out at 725,750 and 775℃,inlet methane to oxygen ratios of 2 to 4.5 and gas hourly space velocity(GHSV)of 100 min-1.Correlation of the kinetic data has been performed with the proposed mechanisms.The selected equations have been regressed with experimental data accompanied by genetic algorithm(GA)in order to obtain optimized parameters.After investigation the LangmuirHinshelwood mechanism was selected as the best mechanism,and Arrhenius and adsorption parameters of this model were obtained by linear regression.In this research the Marquardt algorithm was also used and its results were compared with those of genetic algorithm.It should be noted that the Marquardt algorithm is sensitive to the selection of initial values and there is possibility to trap in a local minimum.
其他文献
The plasma technology served as a tool in unconventional catalysis has been used in natural gas conversion, because the traditional catalytic methane oxidative
期刊
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
目的 探讨白细胞介素(IL-17)、(IL-6)与子宫内膜异位症(EMs)患者发生不孕的关系.方法 选择子宫内膜异位症患者45例,包括不孕患者30例(EMs不孕组)与非不孕患者15例(EMs非不孕组),同时选择15例健康成人作为健康对照组,采用酶联免疫吸附法分析3组对象血清中IL-17及IL-6的表达水平,并进行比较分析.结果 EMs不孕组患者手术后血清中IL-17、IL-6水平较手术前明显降低[
以高速微信号处理器TMS320C30为阵元机,研制了8阵元总线并行处理计算机系统,建立了涡轴发动机非线性仿真模型,仿真模型在并行处理机上并行计算实现实时。该实时仿真器通过输入输出接口与涡
期刊
目的探讨大鼠烧伤创面引流淋巴液致炎因子(TNF-α)和抗炎因子(IL-4)水平变化。方法大鼠单侧后腿(随机)浸于70℃热水30s,造成约4%总体表面积(TBSA)深Ⅱ度烫伤,对侧后腿浸于22
因果关系是刑法理论与实践中的一个重要组成部分,它在刑法中涉及范围广泛,是确定犯罪行为的重要步骤.弄清因果关系,能更好地判断犯罪者对其犯罪行为结果应负怎样的刑事责任,
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
目的 评价剖宫产同时行子宫肌瘤切除术的可行性和安全性.方法 分析2003年1月至2009年12月期间在广东省湛江市第二人民医院接受剖宫产同时行子宫肌瘤切除术的42例患者(研究组)