Alkali promoted tubular reforming catalyst
High alkali prereduced catalyst for steam reforming of naphtha feedstocks.
The alkali content on the RK-212 and RK-202 catalysts has been optimized and is generally lower than seen for other alkali-promoted catalysts on the market. Since the alkali has a negative impact on the catalyst activity, the relatively low alkali content is preferable to ensure a high activity of the catalyst. Still, the alkali content on the RK-212 and RK-202 catalysts is sufficiently high to ensure carbon free operation in a steam reformer. The alkali content is so low that fouling of waste heat boilers basically can be excluded.
RK-212 is delivered prereduced and in addition to potassium, are also promoted with a noble metal. This feature of the catalyst makes it especially suited for the inlet conditions in a steam re-forming furnace, where low temperatures are prevailing. The superior ability of RK-212 to operate at the low temperatures in the top of the catalyst tube is the result of a special manufacturing technique and the addition of a noble metal promoter. An additional advantage is that the catalysts have been reduced in Topsoe’s production facilities in dry hydrogen at an optimal temperature, which results in higher activity than what could be obtained by in-situ reduction.