Reforming chamber with constant electric discharge to generate hydrogen
A circuit applies an electric field to a reforming chamber housing a hydrocarbon-water mixture to cause molecular breakdown and create a feed of hydrogen and carbon and dioxide that can be supplied to fuel cells. The circuit includes a DC-to-DC converter, a DC-to-AC inverter and a transformer to transform available input voltage to a control voltage that can be used to apply the electric field to the mixture in the reforming chamber. The signal supplied to the DC-to-AC inverter is monitored to determine whether enough voltage is supplied to create an electrical discharge in the reforming chamber. If an electrical discharge exists, the variables to the circuit is left alone or decreased until the signal indicates the electrical discharge is no longer present. If no electrical discharge exists, the variable input voltage is increased until an electrical discharge is detected.
1. An apparatus, comprising:
a voltage supply configured to generate a variable voltage;
a cold plasma reforming chamber housing a chemical mixture comprising hydrocarbon and water for generation of hydrogen from the chemical mixture;
a drive circuit configured to receive the variable voltage and configured to generate a drive signal for application to the cold plasma reforming chamber;
a sensor configured to sense an operational parameter of the drive circuit; and
a controller configured to calculate a time rate of change of the operational parameter and make a determination that an electrical discharge is occurring in the cold plasma reforming chamber based on the time rate of change of the operational parameter being positive, wherein the controller is configured to control the variable voltage in response to said electrical discharge determination and maintain the generation of the hydrogen from the chemical mixture in the cold plasma reforming chamber.
2. The apparatus of claim 1 , wherein the controller decreases the variable voltage when the determination indicates the electrical discharge is occurring and increases the variable voltage when the determination indicates the electrical discharge is not occurring based on the time rate of change of the operational parameter being negative.
3. The apparatus of claim 1 , wherein the chemical mixture comprises at least one of ethanol, methane, and propane.
4. The apparatus of claim 1 , wherein the operational parameter is a measure of current.
5. The apparatus of claim 1 , wherein the operational parameter is a measure of power.
6. The apparatus of claim 1 , wherein the drive circuit comprises:
a converter configured to convert the variable voltage to a DC voltage;
an inverter configure to generate an AC voltage based on the DC voltage; and
a transformer receiving the AC voltage and supplying the drive signal to the cold plasma reforming chamber.
7. The apparatus of claim 1 , wherein a portion of the chemical mixture molecularly breaks down and results in a synthetic gas comprising the hydrogen (H 2 ) when the electrical discharge is occurring in the cold plasma reforming chamber.
8. The apparatus of claim 1 , wherein the drive signal comprises an AC voltage with a frequency ranging between 1-10 kHz.
9. The system of claim 1 , wherein the operational parameter comprises at least one member of a group comprising current, power, and voltage.
10. An apparatus, comprising:
a voltage supply configured to generate a variable voltage;
a cold plasma reforming chamber housing a chemical mixture comprising a hydrocarbon and water;
a drive circuit configured to receive the variable voltage and configured to generate a drive signal for application to the cold plasma reforming chamber housing for generation of hydrogen from the chemical mixture; and
a control circuit including a sensor configured to sense a voltage or current output of the drive circuit, determine whether a cold plasma reaction is occurring in the cold plasma reforming chamber based on voltage or current output, and control a setting of the variable voltage based on the cold plasma reaction occurring in the cold plasma reforming chamber to maintain the generation of the hydrogen from the chemical mixture in the cold plasma reforming chamber.