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Electro-Physical Purification of Gases

#1432


Development of Scientific Foundations and Establishment of Technological Basis of Pulse Electro-Physical Techniques for Purification of Industrial Stack Gases from Toxic Volatile Organic Compounds

Tech Area / Field

  • ENV-APC/Air Pollution and Control/Environment
  • OTH-ELE/Electrotechnology/Other

Status
3 Approved without Funding

Registration date
21.12.1998

Leading Institute
VNIITF, Russia, Chelyabinsk reg., Snezhinsk

Supporting institutes

  • URALELASTOTEKHNIKA Limited Joint Stock Company, Russia, Sverdlovsk reg., Ekaterinburg\nInstitute of Electrophysics, Russia, Sverdlovsk reg., Ekaterinburg

Collaborators

  • Uni Sci International, USA, CA, Fullerton

Project summary

The project seeks to develop scientific foundations and technological basis of pulsed electro-physical techniques for purification of industrial stack gases from toxic volatile organic compounds.

Plastics and their compounds are becoming the crucial construction materials in all industries. The world production of plastics reaches dozens millions tons and is continuously growing.

One of the serious problems in production of plastics and plastic items is purification of flue gases from toxic volatile organic compounds (VOC).

The main sources of VOC discharge into atmosphere are the following technological processes:


- production of monomers;
- monomer-based compounds preparation and solidification of compounds;
- "brewing" of seminifimshed and finished items.

The two latter processes contribute VOC into flue gases in small concentrations with huge consumption of air, and this fact complicates even in a bigger extent their efficient removal.

The currently existing technologies for removal of toxic effluents from plastic production facilities are inefficient and are lagging behind the scope of application of the latter.

The core of the proposed electro-physical purification technique is:

Since the bulk of effluents from plastic production consist of volatile monomers, then the technique for their removal from the air can be based on creating polymerization centers and polymerization initiators (ions and radicals) in the air environment. In the presence of these reaction centers monomers are subjected to polymerization into oligomer (i.e. dimers, trimers, etc.) molecules, which are captured by particles of the carrier (air) where further polymerization occurs. Thus it becomes possible to utilize captured polymer in production of various polymer compositions, i.e. establish waste-free production. Such principle can be a foundation for multiple technological schemes seeking utilization of products of VOC-to-valuable composition transformation.

Implementation of polymerization reaction centers in the air can be efficiently done by means of electro-physical methods (electron beams and non-self-maintained discharge). In the electron-beam-made plasma it is possible to implement the polymerization reaction where final products are in the solid form.

MAIN EXPECTED RESULTS:

1. Quantitative estimates of the energy efficiency of removing table-specified monomers from effluents imitating model mixtures, by means of repetitive pulse electronic beams and volumetric discharges they initiate will be acquired. The obtained experimental results will enable understanding of mechanism for neutralization of volatile organic compounds (VOC) molecules.

2. There will be built computational-theoretical model of plasma-chemistry processes in the organic molecules containing air ionized by means of pulse electron beams and electric discharges.

3. Based on the results accomplished at items 1 and 2 there will be performed optimization of parameters of ionization sources in order to implement the most energy saving modes of effluents purification from VOC. Also there will be produced empirical equations describing the value of energy cost for removal of one toxic molecule versus initial concentration and required extent of purification (for every VOC given in the table below). These equations will be the basis for prediction of purification energy efficiency and for scale-up at the time of creation of real cleansing installations.

4. The technological basis for implementation of electro-physical technique of effluent purification from VOC will be created. This will include:


- development of plasma-chemistry reactor with power supply system;
- development of versatile accelerating tube with high value of mean time between failures.
- build modern techniques of VOC air concentration measurement.

Upon the completion of the project the major participants (IEP UrBr RAS, and RFNC-VNIITF) will be ready to deliver on "turn-key" basis the modern systems for purification of effluents from VOC (the list of specific VOC is given in para 6.2.3) to any interested organization or enterprise in Russia, CIS, or abroad.

5. The block diagram of installation for purification of flue gases from volatile organic compounds at one of the production lines of JSC "Uralelastotekhnika"

In addition it is worth noting that the proposed project is the follow-up of efforts to investigate the physical-chemical processes of flue gases purification from hazardous admixtures by means of repetitive-pulse electron beams, which were carried out under the ISTC Project #271 focused on removal of sulfur and nitrogen oxides. Thus, most of the results and all equipment accrued in course of project #271 will be used to implement the goals of the new project.

Potentially, the role of foreign collaborators (Kumatomo University, Japan) will be:


- university employees will participate on a regular basis in discussions of the produced results, and after the completion of the project, in production of the final report, as well;
- university scientists will actively participate in the efforts to implement the purification technologies developed under the project at the Japanese production enterprises and organizations.

The envisioned substantial reductions in the energy cost of VOC removal from flue gases provided by the new technology vs. the existent ones will undoubtedly be of big commercial interest in the near future.

During performance of the above civilian works VNIITF scientists and engineers will establish direct and business contracts with colleagues from civilian sectors of science and industry in Russia, CIS, and the world community.

We are ready to cooperate within the scope of the project with any institutions and companies of the U.S., Japan, and European Community.


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