| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a cylindrical steam reformer having a heat insulation structure which satisfies simultaneously requirements of high performance, compactness, and low cost. <P>SOLUTION: The cylindrical steam reformer includes a reforming catalyst layer, a CO denatured catalyst layer, and a CO removal layer, and includes an outer circumference of small-diameter cylinder in which the reforming catalyst layer is arranged and an outer circumference of large-diameter cylinder in which the CO denatured catalyst layer and the CO removal catalyst layer are arranged. A heat insulation material layer consisting of powder fumed silica is arranged between the outer circumference of the small-diameter cylinder and the path of the large-diameter cylinder, and a ceramic fiber system insulation material layer is arranged at the outer circumference of the heat insulation material layer consisting of the powder fumed silica and the outer circumference of the large-diameter cylinder. <P>COPYRIGHT: (C)2010,JPO&INPIT |
