Gas Treatment and Measurement Technologies

  Copyright: © Olaf Rohl  

Research Objectives

The minimization of emissions is an obligatory step for all thermal processes and therefore an important and integral part of research at the Unit of Technology of Fuels. The TEER deals with the primary and secondary reduction of gaseous and particulate pollutants. Both the substances that are already in focus of the legal requirements (1st, 11th, 13th, 17th BImSchV) and those that do not have to be reduced legally yet are addressed. In this context, nitrous oxide and mixed halogenated dioxins and furans form a focus of the scientific work here.

In the field of system and process development, TEER deals with separation devices for solid and liquid particles from small combustion plants and acid gas separation from industrial process and waste gases. The experimental investigations take place on a pilot scale as well as on an industrial scale. The production of synthesis gas from renewable and secondary raw materials is also the subject of work at the TEER. The use of H2- and CO-rich synthesis gases in energy-intensive processes, for example in metallurgy, would be an application of this. The work is based on many years of practical experience in the field of wood gasification.

Another focus of the working group is on experimental and theoretical studies in the field of exhaust gas cleaning from thermal systems and processes in the field (including waste incineration plants, cement works, biomass firing systems, sewage-sludge-incineration plants). This includes, among other things, the investigation of the separation efficiency of common devices and processes against novel components such as nanoparticles or carbon fibers.

Measuring Technology

Research at the TEER is supported by extensive measurement and analysis technology for gases and particles. The gas phase is analyzed on the basis of various IR-systems with which both inorganic and organic substances can be quantified. In addition, adsorptive and wet chemical methods are used for the determination of low to semi volatile organic substances (VVOC-SVOC). Particles can be measured gravimetrically with discontinuous working sampling systems as well as online, meaning event-based, during the process. In addition to the number and size distribution, the chemical composition is also determined by various analysis methods.

Gas Analysis Extract

Standard exhaust gas analysis (O2, CO, CO2, NO, NH3, SO2, HCl): Paramagnetic, NDIR / IR filter photometer Special exhaust gas analysis (HF, HCN, N2O, COS, COCl2, Hg, PCDD/F, PCB): FTIR, wet chemical processes Synthesis gases (H2, CO, CO2, CH4, Ges-C): catalytic converter, FTIR, FID Tars and PAH: wet chemical processes, adsorptive processes (for example XAD) VVOC - SVOC (aldehydes, ketones, BTXE, PAK): FTIR, adsorptive processes (for example DNPH, Tenax, Carbosieve)

Particle analysis extract

Particle mass concentration: various discontinuous, extractive sampling systems Chemical composition and physical condition: XRF, ICP MS, SEM EDX, light microscopy Particle number and size distribution: mobility scanner, CPC, impactor, cyclone

 

Research Projects