Calcium aluminates

About: Calcium aluminates is a research topic. Over the lifetime, 490 publications have been published within this topic receiving 9200 citations.

Catalytic pyrolysis of naphtha on calcium aluminate catalysts. Effect of potassium carbonate impregnation

Abstract: Steam pyrolysis of naphtha has been studied over potassium carbonate impregnated calcium aluminate (12CaO-7Al 2 O 3 ) catalysts in a fired-bed reactor at atmospheric pressure in the temperature range of 1033-1093 K. The K 2 CO 3 loading on the catalyst was varied from 0 to 8.8 wt %. Incorporation of K 2 CO 3 in the catalyst significantly reduced the coke deposited on the catalyst. Compared to 12CaO-7Al 2 O 3 catalyst, the yield of CO 2 was considerably higher whereas the hydrocarbon yields were marginally reduced due to addition of K 2 CO 3 . A significant amount of potassium loss from the catalyst occurred during the pyrolysis operation

Promoted calcium-aluminate supported catalysts for synthesis gas generation

Abstract: A promoted calcium-alumina supported reforming catalyst that is particularly useful for reforming reactions where low H2/CO ratio synthesis gas, such as less than 2.3 is generated directly is disclosed. The catalyst comprises from about 25 wt% to about 98 wt % alumina, from about 0.5 wt% to about 35 wt% calcium oxide, from about 0.01 wt% to about 35 wt% of a promoter, and from about 0.05 wt% to about 30 wt% of an active metal. The promoter is selected from the group consisting of titanium, zirconium, yttrium, niobium, elements of the lanthanum-series, such as, without limitation, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, ytterbium, and combinations thereof. The active metal is selected from the group consisting of nickel, cobalt, rhodium, ruthenium, palladium, platinum, iridium and combinations thereof as active metal, wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.