The development of new manufacturing processes is advancing rapidly. The use of new materials is giving rise to a wide variety of novel exhaust gas compositions. For energy and environmental reasons, exhaust gas recirculation is a sensible approach. However, this requires effective purification of the exhaust gas. The major challenge here lies in trace substances.
Dipl.-Ing.
Stefan
Holfeld
Areas of application
Exhaust Air Treatment for Battery Manufacturing, Additive Manufacturing Processes, Odor Control
Objective
The project aimed to devise and develop technological solutions that would enable the capture of specific trace substances from process exhaust air generated by new production processes.
Procedure
Critical trace substances were identified, characterized, and classified through measurements in actual process exhaust air and theoretical analyses. Fundamental investigations of potential methods for separating these substances on a laboratory scale and determining their operational limits laid the technological foundation for the development of a corresponding purification process. Finally, by constructing a pilot-scale prototype, the functionality and technical feasibility of the new purification process were demonstrated. The project proceeded in the following steps:
Identification and analysis of trace substances present
Systematization of trace substances relevant to the production process
Development and provision of specialized sorbents
Laboratory-scale investigations of separation behavior
Laboratory-scale development of technological solutions for trace substance reduction
Adsorption Capacity of Various Activated Carbons for a Trace Substance Mixture as a Function of Concentration
Findings
As a result, a separation process consisting of one filtration stage, two sorption stages, and a catalyst was developed and tested on actual exhaust air from an industrial facility, achieving very good separation efficiency of over 90%. Work is currently underway to implement the first plant.
