Sorbent bed assembly and fuel cell system including same
A sorbent bed assembly, a fuel cell system including the sorbent bed assembly, and methods of using the same. The sorbent bed assembly includes sorbent beds disposed in a stack, such that the sorbent beds extend lengthwise in a non-vertical direction, and conduits configured to fluidly connect the sorbent beds. One or more of the sorbent beds may also include a housing, a removable cartridge disposed in the housing and comprising a sorbent material configured to purify the fuel, and a support configured to prevent the fuel from bypassing the cartridge when the fuel flows through the housing.
1. A fuel processor of a fuel cell system, comprising:
a first sorbent bed assembly (SBA);
a second SBA assembly;
a first four-way valve fluidly connected to a fuel source;
a second four-way valve fluidly connected to a fuel cell of the fuel cell system; and
conduits configured to fluidly connect the first and second sorbent beds and the first and second valves, wherein:
when the first valve is in a first position and the second valve is in a first position, the fuel flows through the first valve, the first SBA, the second valve, the first valve, the second SBA, and then to the fuel cell;
when the first valve is in a second position and the second valve is in a second position, the fuel flows through the first valve, the second SBA, the second valve, the first valve, the first SBA, the second valve, and then to the fuel cell;
when the first valve is in the second position and the second valve is in the first position, the fuel flows through the first valve, the second SBA, the second valve, and then to the fuel cell, without passing through the first SBA; and
when the first valve is in the first position and the second valve is in the second position, the fuel flows through the first valve, the first SBA, the second valve, and then to the fuel cell, without passing through the second SBA.
2. The fuel processor of claim 1 , wherein the conduits comprise:
a valve conduit fluidly connecting the first and second valves;
a fuel source conduit fluidly connecting the first valve to a fuel source;
a stack conduit fluidly connecting the second valve to the fuel cell;
a first inlet conduit fluidly connecting the first valve and the first SBA;
a first outlet conduit fluidly connecting the first SBA and the second valve;
a second inlet conduit fluidly connecting the first valve and the second SBA; and
a second outlet conduit fluidly connecting the second SBA and the first valve.
3. The fuel processor of claim 2 , further comprising one or more of:
a system purge valve disposed in fluid communication with the fuel source conduit;
a first purge valve disposed in fluid communication with the first outlet conduit; and
a second purge valve disposed in fluid communication with the second outlet conduit.
4. The fuel processor of claim 1 , wherein:
the first and second SBAs each comprise sorbent beds configured to purify a fuel, the sorbent beds being disposed in a stack, such that the sorbent beds extend lengthwise, in a non-vertical direction; and
one or more of the sorbent beds comprise:
a housing;
a removable cartridge disposed in the housing and comprising a sorbent material configured to purify the fuel; and
a support configured to prevent the fuel from bypassing the cartridge when the fuel flows through the housing.