3 results about "Metal dusting" patented technology

The specification describes a gas heated reformer apparatus comprising: one or more tubes containing a steam reforming catalyst; and a shell surrounding said tube(s) and together with the tube(s) defining a shell side; wherein the shell comprises an inlet and outlet for a heat exchange medium; wherein the shell side is provided with a water gas shift catalyst located at one or more areas of the shell side where during use the heat exchange medium in contact with the shell side has a temperature of 500-750° C. Also described is a plant for producing hydrogen, ammonia or methanol comprising the gas heated reformer. A water gas shift catalyst can be retrofitted to an existing gas heater reformer.

A nickel-based alloy is coated with a silicate based nickel aluminide slurry diffusion coating.

The present invention relates to nickel-based alloys. More specifically, this disclosure relates to medium-to-high entropy nickel-based alloys having the following composition in weight percent (wt%): Cr 20.0-26.0; Fe <8.5; Mn <4.0; Si 0.5-2.0; Al 1.0-4.0; Ti 0.50-4.0; C <0.05; N <0.05; Ta <2.0; Nb <4.0; Co 3.0-6.0; Cu 2.1-6.0; Mo <2.0; W <1.0; optionally, B <0.005; optionally, P <0.005; optionally, S <0.005; optionally, Ca, Mg and Ce, totaling less than 0.5; Ni the remainder and incidental impurities. Nickel-based alloys meet the following requirements: a) Cu-(0.1*Fe+2.1)≧0.0 [wherein the formula, the values ​​of the alloying elements are expressed in weight percent], and b) ΔSm i x / (-R)≧1.36, TIFF2026516869000008.tif6170[where c i [where R is the mole fraction and R is the gas constant]. The nickel-based alloys according to this disclosure are primarily intended for solution-annealed objects adapted to be exposed to atmospheres in which metal dusting readily occurs.