Title:
HEAT TRANSMITTING METHOD IN REFORMER
Document Type and Number:
Japanese Patent JP3499273
Kind Code:
B2
Abstract:
PURPOSE: To promote the heat transmission between a reformed gas and a raw gas and to operate a reformer at a low S/C ratio by arranging a ceramic gas-permeable solid in the inner tube of a bayonet-type double catalyst tube.
CONSTITUTION: A columnar gas-permeable solid 13 as a ceramic porous body formed in conformity to the inner diameter of an inner tube 3, having open cells and consisting of mullite, alumina, cordierite, zirconia or silicon carbide is supported by a stopper 14 close to the inlet of the inner tube and arranged in almost the central region or the whole region in the inner tube 3. Natural gas is reformed by the five bayonet-type catalyst tubes shown in the figure, a reforming catalyst 5 is packed to a height of 2700mm, a mullite ceramic foam is packed in the inner tube 3 to a height of 2700mm, the raw natural gas is introduced at 170Nm3/H and the steam at 401kg/H (S/C=2.5), the reformer is continuously operated for 8000hr by controlling the inlet to 434°C, the tip to 820°C, the pressure to 12.4kg/cm2 G and the outlet to 600°C, and a reformed gas contg. 58.7% H2 is obtained almost without the deposition of carbon.
Inventors:
Nobuo Moriya
Takuo Kawai
Hiroshi Yagi
Ryosuke Shimizu
Yasumasa Morita
Takuo Kawai
Hiroshi Yagi
Ryosuke Shimizu
Yasumasa Morita
Application Number:
JP33467493A
Publication Date:
February 23, 2004
Filing Date:
December 28, 1993
Export Citation:
Assignee:
Chiyoda Kakoh Construction Co., Ltd.
International Classes:
C01B3/38; C01B32/40; H01M8/06; (IPC1-7): C01B3/38; H01M8/06
Domestic Patent References:
| JP4300642A | ||||
| JP5815005A | ||||
| JP1151835U |
Attorney, Agent or Firm:
Masao Okabe (4 others)
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