Control and intensification of chemical reactions due to periodically operating distributors

由于分配器定期运行而控制和强化化学反应

• 批准号: 382737264
• 负责人: Professor Dr.-Ing. Christof Hamel
• 金额: --
• 依托单位: Max-Planck-Institut für Dynamik komplexer technischer Systeme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/382737264?language=en
• 关键词: Control; intensification; chemical; reactions; due

Aim of the project is to increase the yield of desired olefins by means of reactant dosing in membrane distributors. In a periodically operating distributor the oxidative and thermal dehydrogenation of the industrial relevant model system propane should be investigated. With a view to exploiting maximum synergy effects a mass and energy coupling in one integrated reactor will be realized and evaluated.The disadvantage of catalyst deactivation in the thermal dehydrogenation is intended to be compensated by a periodically operation exploiting the apparatus/catalyst in each phase of the process. Thus, a controlled transmembrane oxygen flow, changing temporally with catalyst activity, has to be estimated based on suitable models. Control of temperature and velocity of reaction fronts will be efficiently adjusted by distributed dosing.Based on transient computational studies (1D/2D) optimal dosing profiles were identified by characterising and evaluating the complex temperature and velocity fields. Furthermore, the deactivation/regeneration of the catalyst by using thermogravimetry and a segmented fixed-bed reactor in a laboratory scale was quantified and mathematically described. Detailed 2D models implementing various approaches for heat transfer were applied to study the influence of particle diameter and porosity distribution by dosing concepts in membrane reactors in order to evaluated the planned reactor scale up.The temporal development of the project was influenced by unforeseeable factors (Preamble) e.g. the Corona shutdown of the mechanical workshop and the pilot plant hall. Thus, the important experimental based working packages 4-5 are not in progress yet. These APs aim in particular at the planned realization of the developed periodically operated distributors not only in a disintegrated (decoupled temperature effects) but also in a fully integrated way with material and energetic coupling in pilot scale They play an essential role for the successful overall conclusion of the project in the form of the experimental validation of the promising simulation results obtained so far on a pilot scale. Up to now, during the successful course of the project, 9 contributions to national and international conferences (1 poster price) and a first paper „Analysis of Membrane Reactors for Integrated Coupling of Oxidative and Thermal Dehydrogenation of Propane” (2 further publications in preparation) could be published.

该项目的目的是通过在膜分布器中进行反应物投料来提高所需烯烃的产率。在周期性运行的分布器中，应研究工业相关模型体系丙烷的氧化脱氢和热脱氢。为了利用最大的协同效应，在一个集成的反应器中的质量和能量耦合将被实现和评估。在热脱氢中催化剂失活的缺点旨在通过在该方法的每个阶段利用设备/催化剂的周期性操作来补偿。因此，必须基于合适的模型来估计随催化剂活性随时间变化的受控跨膜氧流量。基于瞬态计算研究（1D/2D），通过表征和评估复杂的温度场和速度场，确定了最佳的投加曲线。此外，通过使用热重和分段固定床反应器在实验室规模的催化剂的失活/再生进行了定量和数学描述。详细的2D模型实现了各种传热方法，用于研究膜反应器中给药概念对颗粒直径和孔隙率分布的影响，以评估计划的反应器放大。该项目的时间发展受到不可预见因素的影响（序言），例如机械车间和中试车间大厅的电晕停机。因此，重要的基于实验的工作包4-5尚未在进行中。这些AP的目的特别是在计划实现的开发周期性运行的分配器不仅在一个解体（解耦的温度效应），但也在一个完全集成的方式与材料和能量耦合中试规模他们发挥了至关重要的作用，该项目的成功的整体结论的形式，实验验证的有前途的模拟结果，迄今为止在中试规模。到目前为止，在该项目的成功实施过程中，已向国家和国际会议提交了9份论文（1份海报价格），并发表了第一篇论文“丙烷氧化和热脱氢综合耦合膜反应器分析”（另外2份出版物正在筹备中）。