Abstract: A cylindrical fuel reforming apparatus covered with a thermal insulating layer 16 comprises a fuel flow passage 1 contoured by a cylindrical contour wall 2 in its central axial direction and a reforming catalyst bed 3 in the middle of the flow passage for reforming gas to be reformed flowing from the upstream of the fuel flow passage 1 into a proper reformed gas. A cooling jacket 10 is arranged in the upstream of the reforming catalyst bed 3 so as to surround the fuel flow passage 1 and to be supplied with steam 11 for cooling the cylindrical contour wall 2. There are provided in the cylindrical contour wall 2 in the upstream of the reforming catalyst bed 3 a plurality of injection nozzles 15 communicating the cooling jacket 10 with the fuel flow passage 1 so that the steam 11 introduced into the cooling jacket 10 is allowed to flow into the fuel flow passage 1.

Abstract: A cylindrical fuel reforming apparatus covered with a thermal insulating layer 16 comprises a fuel flow passage 1 contoured by a cylindrical contour wall 2 in its central axial direction and a reforming catalyst bed 3 in the middle of the flow passage for reforming gas to be reformed flowing from the upstream of the fuel flow passage 1 into a proper reformed gas. A cooling jacket 10 is arranged in the upstream of the reforming catalyst bed 3 so as to surround the fuel flow passage 1 and to be supplied with steam 11 for cooling the cylindrical contour wall 2. There are provided in the cylindrical contour wall 2 in the upstream of the reforming catalyst bed 3 a plurality of injection nozzles 15 communicating the cooling jacket 10 with the fuel flow passage 1 so that the steam 11 introduced into the cooling jacket 10 is allowed to flow into the fuel flow passage 1.

Abstract: A cylindrical fuel reforming apparatus covered with a thermal insulating layer 16 has a fuel flow passage 1 contoured by a cylindrical contour wall 2 in its central axial direction, and a reforming catalyst bed 3 is disposed in the middle of the flow passage for reforming gas, flowing from the upstream end of the fuel flow passage 1, into a proper reformed gas. A cooling jacket 10 is arranged upstream of the reforming catalyst bed 3 so as to surround the fuel flow passage 1 and the cooling jacket is supplied with steam 11 for cooling the cylindrical contour wall 2. There are provided in the cylindrical contour wall 2 upstream of the reforming catalyst bed 3 a plurality of injection nozzles 15 for effecting communication between the cooling jacket 10 and the fuel flow passage 1 so that the steam 11 introduced into the cooling jacket 10 is allowed to flow into the fuel flow passage 1.