US 2011/0033373 A1Published application

Multi-fluidized bed water-gas shift reactor using syngas and production of hydrogen using the same

AssigneeKorea Institute of Energy Research

InventorsSee Hoon LEE, Jae Ho KIM, Jung Min SHON

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Abstract

A multi-fluidized bed water-gas shift reactor wherein a specific syngas containing a high concentration of carbon monoxide produced by gasification of a heavy carbon source such as coal, vacuum residue, glycerin, etc., is in contact with water under a catalyst so as to produce hydrogen and, in addition, a method for production of hydrogen using the foregoing reactor are disclosed. In other words, the disclosure describes a multi-fluidized bed water-gas shift reactor containing low and high temperature catalysts as well as steam and a method for production of hydrogen using the same, wherein 30 to 70% carbon monoxide in the syngas as a gas mixture containing hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, hydrogen monoxide, and the like, which are generated through partial oxidation and vapor gasification at 900 to 1,600° C., may be favorably converted into hydrogen without mixing both of the catalysts.

Claims9

Dependent claims

A multi-fluidized bed water-gas shift reactor including a gas reaction tank 20 which has upper and lower chambers separated by a compartment 21 placed in the middle of the tank and in which a syngas containing a high concentration of carbon monoxide reacts with a catalyst to convert the syngas into hydrogen, comprising:

a high temperature catalytic reaction chamber 30 as the lower chamber partitioned in the tank by the compartment 21, including a top reaction space 32 in which a high temperature catalyst converting carbon monoxide into hydrogen at a high temperature is loaded, as well as a bottom mixing space 33 receiving a mixed gas and a steam, wherein both the spaces 32 and 33 are partitioned by a porous plate 31, a syngas input line 23 and a steam input line 24 are connected to the bottom mixing space in order to flow the steam as well as the syngas heated by a preheater 25 into the bottom space, in turn dispersing the syngas and the steam into the top reaction chamber;
a low temperature catalytic reaction chamber 40 as the top reaction chamber partitioned in the tank by the compartment wherein a low temperature catalyst is loaded in the top chamber, and the gas reformed after reaction is discharged outside through a low temperature reaction gas output line 43 connected to a top of the chamber;
and
a cyclone 50 that receives the reformed gas after the high temperature reaction from a high temperature reaction gas output line 34 connected to the top of the high temperature catalytic reaction chamber 30 and conducts solid-gas separation to separate a gaseous ingredient, e.g., a high temperature reaction gas, wherein the reaction gas is fed into a lower side of the low temperature catalytic reaction chamber 40 through a high temperature reaction gas input line 41 while the catalyst as the separated solid ingredient returns to the high temperature catalytic reaction chamber through a catalyst recycling line 51 or, otherwise, is exhausted.

1 more element

A method for production of hydrogen using a syngas by a multi-fluidized bed water-gas shift reactor that has a high temperature catalytic reaction chamber having a bottom mixing space and a top reaction space partitioned therein, a low temperature catalytic reaction chamber integrated to a top of the high temperature catalytic reaction chamber, a cyclone for transporting a reaction gas from the high temperature catalytic reaction chamber to the low temperature catalytic reaction chamber, and first and second heat exchangers mounted on inner top sides of both the chambers, respectively, in order to recover heat, the method comprising:

a gas introduction process (S1) of feeding a gas mixture and a steam into the bottom mixing space of the high temperature catalytic reaction chamber in which a high temperature catalyst is loaded;
a high temperature reaction process (S2) of dispersing the gas mixture and the steam throughout the top reaction space of the high temperature catalytic reaction chamber through a porous plate which in turn enables hydrogen conversion by the high temperature catalyst at a high temperature of 300 to 450° C.;
a high temperature reaction gas transport process (S3) of separating the high temperature reaction gas from impurities by the cyclone and feeding only a pure high temperature reaction gas into the low temperature catalytic reaction chamber;
a low temperature reaction process (S4) of converting the transported gas into hydrogen in the cyclone using a low temperature catalyst at a low temperature of 200 to 250° C.;
and
a process of discharging the low temperature reaction gas with increased hydrogen content (S5).

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/615,939Filed 10 Nov 2009
Priority: KR 10-2009-00727267 Aug 2009
Published: 10 Feb 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

C01B 3/28
Of hydrocarbons: using moving solid particles, e.g. fluidised bed technique
B01J 8/0055
Separating solid material from the gas/liquid stream: using cyclones
B01J 8/1836
With fluidised particles: heating and cooling the reactor
B01J 8/28
With two or more fluidised beds, e.g. reactor and regeneration installations: the one above the other