NOx emission reduction system and method
AssigneeSamsung SDI Co., Ltd.
InventorIn-Hyuk Son
Life of this patent
Estimating the term…
Abstract
A method and system to reduce NOx emissions from an engine connected to a fuel tank and an exhaust line, the apparatus including, a reformer to reform the fuel into hydrogen (H2); a fuel cell stack to convert the hydrogen into electricity; a reduction unit disposed on the exhaust line to convert the NOx into N2; a first bypass line to provide a fluid communication between the first fuel tank and the fuel reformer; a second bypass line to provide a fluid communication between the fuel reformer and the fuel cell stack; a first reformate line to provide a fluid communication between the second bypass line and the exhaust line. The hydrogen is mixed with the NOx in the exhaust line, and then the reduction unit uses the hydrogen to convert the NOx into nitrogen (N2).
Claims17
A NOx emission reduction system to reduce NOx emissions from an internal combustion engine, the system comprising:
- an internal combustion engine fluidly connected to a fuel tank;
- an exhaust line fluidly connected to the internal combustion engine;
- a fuel reformer to reform a first fuel into hydrogen (H2);
- a fuel cell stack to convert the hydrogen into electricity, the fuel cell stack fluidly connected to the fuel reformer via a first pipe;
- a hydrogen selective catalytic reduction (H-SCR) unit disposed on the exhaust line to convert the NOx into N2 using the hydrogen;
- a second pipe fluidly connecting the fuel cell stack to the fuel reformer, the second pipe not in fluid communication with the first pipe;
- a reformate line to provide a fluid communication between the first pipe and the exhaust line;
- and
- a valve disposed on the first pipe, to independently control flow rates of the hydrogen through the reformate line and the first pipe.
A NOxemission reduction system to reduce NOxemissions from an internal combustion engine, the system comprising:
- a fuel reformer to reform the fuel into hydrogen (H2);
- a fuel cell stack to convert the hydrogen into electricity;
- an internal combustion engine fluidly connected to a fuel tank by a fuel line;
- an exhaust line fluidly connecting the engine to a reduction unit, the reduction unit capable of converting NOxto N2 and O2;
- a first bypass line fluidly connecting the fuel tank to a fuel reformer, the reformer configured to reform the fuel into hydrogen (H2);
- a second bypass line to provide a fluid communication between the fuel reformer and a fuel cell stack fluidly connecting the fuel reformer to a fuel cell stack;
- the reduction unit disposed on the exhaust line, to convert the NOx into N2;
- the first bypass line providing a fluid communication between the fuel tank and the fuel reformer;
- the second bypass line providing a fluid communication between the fuel reformer and the fuel cell stack;
- a third bypass line fluidly connecting the fuel cell stack to a burner of the fuel reformer, the third bypass line not fluidly connected to either the first bypass line or the second bypass line;
- a first reformate line to provide a fluid communication between the second bypass line and the exhaust line;
- and
- a first valve disposed on the second bypass line, to independently control flow rates of the hydrogen through the first reformate line and the second bypass line.
A method of reducing NOx emissions from an internal combustion engine, the method comprising:
- supplying fuel from a fuel tank to an internal combustion engine;
- conducting exhaust from the internal combustion engine through an exhaust line;
- supplying the fuel to a fuel reformer;
- generating hydrogen (H2) in the fuel reformer;
- supplying the hydrogen to a fuel cell stack and simultaneously supplying the hydrogen to the exhaust line by use of a single valve to produce a mixture of the hydrogen and the exhaust;
- supplying the mixture to a reduction unit to convert NOx, into nitrogen (N2) and oxygen (O2);
- and
- supplying anode off gas from the fuel cell stack to the fuel reformer, wherein the anode off gas does not mix with either the fuel from the fuel tank or the hydrogen (H2,) supplied to the fuel cell stack.
A method of reducing NOx emissions from an internal combustion engine, the method comprising:
- supplying a first fuel from a first fuel tank to an internal combustion engine;
- conducting exhaust from the internal combustion engine though an exhaust line;
- supplying a second fuel from a second fuel tank to a fuel reformer;
- generating hydrogen (H2) in the fuel reformer;
- supplying the hydrogen to a fuel cell stack and simultaneously supplying the hydrogen to the exhaust line by use of a single valve to produce a mixture of the hydrogen and the exhaust;
- supplying the mixture to a reduction unit to convert NOxinto nitrogen (N2) and oxygen (O2);
- and
- supplying anode off gas from the fuel cell stack to the fuel reformer, wherein the anode off gas does not mix with either the fuel from the fuel tank or the hydrogen (H2) supplied to the fuel cell stack.
Dependencies are inferred from the claim text.