| 摘要 |
PURPOSE:To maintain the activity of the captioned catalyst, which is obtained by holding the specific fine pore distributions in the columnar catalysts comprising carrying hydrogenation components to porous alumina having petal-form cross sections, for a long time stably and reduce pressure losses. CONSTITUTION:The desulfurization catalysts comprising carrying hydrogenation components on porous alumina are made into columnar bodies, wherein 3-6 circles of the same diameter as that of the central circle are disposed around the circle of diameters about 0.4-5mm in cross section at an equal angle, the center-to-center distance of the central circle and circumferential circles is made about 1/4-3/4 of the diameter of the central circle and the height of the columnar bodies is made about 2-15mm. Further, the fine pore distributions of the catalysts are measured with a N2 gas adsorption method and are so arranged that the mean diameters within the range of fine pore diameters 0-600Angstrom are 100-130Angstrom , that the fine pore volume total of diameters of 90-140Angstrom becomes 70% or more of the fine pore volume total of diameters of 0-600Angstrom and that the fine pore volume total having diameters of 0-60Angstrom becomes 10% or less of the fine pore volume total of diameters of 0-600Angstrom . Further, arrangement is so made that the fine pore distribution conditions measured with a mercury penetration method are satisfied as well. |
