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.

本课题旨在系统研究活性炭表面含氧官能团与汞的复杂相互作用。在实验的基础上，通过对化学吸附过程的建模、模拟和最终量化，力求在分子尺度上有深入的了解。为了实现可重复的实验条件，我们将通过定量氧化rsp对三种碱性活性炭进行化学修饰。减少。此外，其他杂原子如氯、硫或磷的比例也要通过浸渍来改变。为了避免误解，这一过程是必要的，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炭中。改性后的碳将通过一系列方法进行表征，如元素分析、boehm滴定和过量等温线的测量。在此基础上，对汞与活性炭的相互作用进行了全面的实验研究。这包括在固定床上的突破性实验以及含汞吸附剂的温度程序解吸（TPD）。通过动态模拟对实验进行定性和定量分析。这些模拟与表征数据的结合将导致相互作用的机理解释，包括定量参数，如活化能和反应的顺序。