| 摘要 |
PROBLEM TO BE SOLVED: To provide a new exhaust after-treatment method of an internal combustion engine, and to provide a new internal combustion engine.SOLUTION: In an exhaust after-treatment method of an internal combustion engine (10), in particular, an internal combustion engine having at least one stage of exhaust turbo supercharge through at least one exhaust turbocharger (13), and exhaust emission control through a SCR catalyst (14), and being operated with a heavy oil, the SCR catalyst (14) is disposed on the exhaust turbocharger (13) or at an upstream side of each exhaust turbocharger (13) in the exhaust flowing direction, sulfur dioxide is oxidized to sulfur trioxide at a downstream side of the SCR catalyst (14) and on the exhaust turbocharger (13) or at the upstream side of each exhaust turbocharger (13) in the exhaust flowing direction, and sulfur trioxide is condensed to sulfuric acid to be removed from the exhaust as sulfuric acid at the exhaust turbocharger (13) or at a downstream side of each exhaust turbocharger in the exhaust flowing direction. |
