초록 ▼

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 m-3. The foam may be made by forming a negative repli

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 m-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.

대표청구항 ▼

A catalyst containing a catalytically active material, or a precursor to such a catalyst containing a material convertible to catalytically active material, wherein said catalytically active material, or said material convertible thereto, comprises, or is supported on, a ceramic foam having a networ

A catalyst containing a catalytically active material, or a precursor to such a catalyst containing a material convertible to catalytically active material, wherein said catalytically active material, or said material convertible thereto, comprises, or is supported on, a ceramic foam having a network of irregular passages extending therethrough, said passages having an average minimum dimension in the range of 20 to 300 m40 to 85% and an apparent density of at least 1 g.cm-3.