Investigation of the interactions of mercury with oxygen-containing functional groups on the surface of activated carbons

汞与活性炭表面含氧官能团相互作用的研究

• 批准号: 437971415
• 负责人: Professor Dr.-Ing. Dieter Bathen
• 金额: --
• 依托单位: Lehrstuhl für Thermische Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/437971415?language=en
• 关键词: Investigation; interactions; mercury; oxygen; containing

The aim of the proposed project is the systematic investigation of the complex interactions of mercury with oxygen-containing functional groups on the surface of activated carbons. Based on experiments we strive for a deep understanding on the molecular scale by modelling, simulating and finally quantifying the chemisorptive processes.To realize reproducible experimental conditions we will chemically modify three basic activated carbons in a defined way by quantitative oxidation rsp. reduction. In addition the ratios of other heteroatoms like chlorine, sulphur or phosphorus are to be modified by impregnation. This proceeding is necessary in order to avoid misinterpretations as these heteroatoms also interact with mercury and they are naturally present in activated carbons due to the raw materials and/or the production process.The modified carbons will be characterized by a set of methods, e.g. elemental analysis, Boehm-titration and measuring of excess isotherms. Based on the characterization, a comprehensive experimental investigation of the mercury interaction with activated carbons is projected. This includes breakthrough experiments in fixed beds as well as temperature programmed desorption (TPD) of mercury loaded adsorbents.The experiments will be analysed not only qualitatively but also in a quantitative way by means of dynamic simulations. The combination of these simulations with the data from the characterization will result in a mechanistic interpretation of the interactions including quantitative parameters like activation energies and orders of reactions.

拟议项目的目的是对汞与活性碳表面上含氧官能团的复杂相互作用进行系统研究。基于实验，我们通过建模，模拟和最终量化化学源性过程来深入了解分子尺度。要实现可重复的实验条件，我们将通过定量氧化RSP以定义的方式化学修改三个基本的活性碳。减少。此外，还应通过浸渍来改变其他杂原子（如氯，硫或磷）的比率。为了避免误解，必须进行此程序，因为这些杂原子也与汞相互作用，并且由于原材料和/或生产过程，它们自然存在于活性碳中。修饰的碳将以一组方法的特征。元素分析，BOEHM屈服和过量等温线的测量。根据表征，预测了与活性碳汞相互作用的全面实验研究。这包括在固定床中的突破实验以及汞载荷吸附剂的温度编程解吸（TPD）。不仅将通过定量方式分析实验，还将通过动态模拟进行定量。这些模拟与来自表征的数据的组合将导致对相互作用的机械解释，包括定量参数，例如激活能和反应顺序。