Nonthermal Plasma System for Marine Diesel Engine Emission Control
| Autor: | Radu Beleca, Nadarajah Manivannan, Wamadeva Balachandran, Nehemiah Sabinus Alozie, David Brennen, Maysam F. Abbod, Lionel Ganippa |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Kinetic model Lab scale Analytical chemistry Plasma Electron 010501 environmental sciences Nonthermal plasma Diesel engine 01 natural sciences Industrial and Manufacturing Engineering Control and Systems Engineering Plasma chemistry Electrical and Electronic Engineering Nitrogen oxides 0105 earth and related environmental sciences |
| Zdroj: | IEEE Transactions on Industry Applications. 52:2496-2505 |
| ISSN: | 1939-9367 0093-9994 |
| DOI: | 10.1109/tia.2016.2518131 |
| Popis: | A nonthermal plasma reactor (NTPR) using two 2.45-GHz microwave (MW) generators for the abatement of nitrogen oxides ( ${\text {NO}}_{\text {x}}$ ) and sulfur ( ${\text {SO}}_{\text {x}}$ ) contained in the exhaust gas of a 200-kW marine diesel engine was built and tested. Numerical analysis based on a nonthermal plasma kinetics model for the abatement of ${\text {NO}}_{\text{x}}$ and ${\text{SO}}_{\text{x}}$ from marine diesel engine exhaust gas was performed. A generic kinetic model that implements electron collisions and plasma chemistry has been developed for applications involving low-temperature (50–100 K) nonthermal plasma. Abatement efficiencies of ${\text {NO}}_{\text{x}}$ and ${\text {SO}}_{\text{x}}$ were investigated for a range of mean electron energies, which directly impact on the rate constants of electron collisions. The simulation was conducted using the expected composition of exhaust gas from a typical two-stroke, slow-speed marine diesel engine. The simulation results predict that mean electron energy of 0.25–3.2 eV gives abatement efficiency of 99% for ${\text {NO}}_{\text{x}}$ and ${\text {SO}}_{\text{x}}$ . The minimum residence time required was found to be 80 ns for the mean electron energy of 1 eV. Multimode cavity was designed using COMSOL multiphysics. The NTPR performance in terms of ${\text {NO}}_{\text{x}}$ and ${\text {SO}}_{\text{x}}$ removal was experimentally tested using the exhaust from a 2-kW lab scale, two-stroke diesel engine. The experimental results also show that the complete removal of NO is possible with the MW plasma (yellow color) generated. However, it was found that generating required MW plasma is a challenging task and requires further investigation. |
| Databáze: | OpenAIRE |
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