Process for decreasing content of particulate material contained in exhaust gas from lean burn engine or the like
OwnerKenji Dosaka, Tadayoshi Hayashi +3inventors
InventorsKenji Dosaka, Tadayoshi Hayashi, Masanobu Miki, Kazuhide Terada, Yoshiyuki Nakanishi
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Abstract
To decrease the content of a particulate material contained in an exhaust gas from a diesel engine or the like, the content of the particulate material is continuously decreased by generating plasma in the exhaust gas containing the particulate material to thereby produce a plurality of O(1D) radicals and subsequently produce a plurality of per-hydroxide excited species, and oxidizing the particulate material by the per-hydroxide excited species.
Claims12
A process for decreasing the content of a particulate material contained in an exhaust gas from a lean burn engine, comprising the steps of:
- generating plasma in the exhaust gas discharged from the lean burn engine and containing the particulate material, to thereby produce a plurality of O(1D) radicals and subsequently produce a plurality of per-hydroxide excited species;
- and oxidizing the particulate material by the per- hydroxide excited species.
A process for decreasing the content of a particulate material contained in an exhaust gas from a lean burn engine or the like and comprising a carbon solid fraction and a soluble organic fraction covering the carbon solid fraction, the process comprising the steps of:
- subjecting the soluble organic fraction to the reaction with oxygen under the presence of a catalyst to oxidize the soluble organic fraction;
- generating plasma in the exhaust gas to produce plasma excited species;
- and oxidizing the carbon solid fraction by the plasma excited species.
A process for decreasing the content of a particulate material contained in an exhaust gas from a lean burn engine or the like, comprising the steps of:
- generating plasma in the exhaust gas discharged from the lean burn engine and containing the particulate material to produce a plurality of nitrogen dioxide molecules and a plurality of ozone molecules;
- and oxidizing the particulate material by the nitrogen dioxide molecules and the ozone molecules.
A process for decreasing the content of a particulate material contained in an exhaust gas from a lean burn engine, comprising the steps of:
- generating plasma in the exhaust gas discharged from the lean burn engine and containing the particulate material to produce a plurality of nitrogen dioxide molecules and a plurality of ozone molecules;
- oxidizing the particulate material by the nitrogen dioxide molecules and-the ozone molecules;
- and subjecting the particulate material to the reaction with the nitrogen dioxide molecules and the ozone molecules in the presence of a catalyst to oxidize the particulate material.
Dependencies are inferred from the claim text.