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公开(公告)号：US4863712A
公开(公告)日：1989-09-05
申请号：US292002
申请日：1988-12-30
CPC分类号： C04B38/0615 , B01J35/04 , B01J35/10 , C01B3/40 , B01J35/0026 , B01J35/1009 , B01J35/1038 , C01B2203/1047 , C04B2111/0081 , C04B2111/1056 , Y02P20/52
摘要： A catalyst, or a precursor thereto, comprises, as the active material or as a support therefor, a ceramic foam having a network of irregular passages extending therethrough, said passages having an average minimum dimension in the range 20 to 300 .mu.m, said foam having a total porosity in the range 40 to 85% and an apparent density of at least 0.7 g. cm-3. The foam may be made by forming a negative replica of an open cell plastics foam by impregnation of the latter with a dispersion of the ceramic material, followed by drying and calcining the impregnated foam to remove the plastics material and to cause the ceramic material to sinter.For a steam reforming catalyst the ceramic may be alpha alumina and the active material nickel and/or cobalt.
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公开(公告)号：US4810685A
公开(公告)日：1989-03-07
申请号：US90341
申请日：1987-08-28
CPC分类号： C04B38/0615 , B01J35/04 , B01J35/10 , C01B3/40 , B01J35/0026 , B01J35/1009 , B01J35/1038 , C01B2203/1047 , C04B2111/0081 , C04B2111/1056 , Y02P20/52
摘要： A catalyst, or a precursor thereto, comprises, as the active material or as a support therefor, a ceramic foam having a network of irregular passages extending therethrough, said passages having an average minimum dimension in the range 20 to 300 .mu.m, said foam having a total porosity in the range 40 to 85% and an apparent density of at least 0.7 g.cm.sup.-3. The foam may be made by forming a negative replica of an open cell plastics foam by impregnation of the latter with a dispersion of the ceramic material, followed by drying and calcining the impregnated foam to remove the plastics material and to cause the ceramic material to sinter.For a steam reforming catalyst the ceramic may be alpha alumina and the active material nickel and/or cobalt.
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