Alkane dehydrogenation catalyst
An alkane dehydrogenation catalyst including a support; and on the support, an active layer including gallium oxide, aluminum oxide, cerium oxide, a Group 1 metal oxide, and a Group 8-11 metal oxide. The catalyst composition of the examples comprises oxides of gallium, cerium, potassium, platinum and aluminium.
1 . An alkane dehydrogenation catalyst comprising:
a support; and
on the support, an active layer comprising
gallium oxide,
aluminum oxide,
cerium oxide,
a Group 1 metal oxide, and
a Group 8-11 metal oxide.
2 . The alkane dehydrogenation catalyst of claim 1 , wherein the support comprises alumina.
3 . The alkane dehydrogenation catalyst of claim 1 , wherein the support comprises silica-modified alumina.
4 . The alkane dehydrogenation catalyst of claim 1 , wherein the active layer comprises, based on a total weight of the alkane dehydrogenation catalyst:
0.1 to 4.0 weight percent of the gallium oxide,
1 to 10 weight percent of the aluminum oxide,
0.1 to 3 weight percent of the cerium oxide,
0.1 to 2 weight percent of the Group 1 metal oxide, and
0.001 to 0.03 weight percent of the Group 8-11 metal oxide.
5 . The alkane dehydrogenation catalyst of claim 1 , wherein the Group 8-11 metal oxide comprises a Group 10 metal.
6 . The alkane dehydrogenation catalyst of claim 1 , wherein the Group 8-11 metal oxide comprises platinum.
7 . The alkane dehydrogenation catalyst of claim 1 , wherein the Group 1 metal oxide comprises potassium, sodium, cesium, or a combination thereof.
8 . The alkane dehydrogenation catalyst of claim 1 , wherein the Group 1 metal oxide comprises potassium.
9 . The alkane dehydrogenation catalyst of claim 1 , wherein the alkane dehydrogenation catalyst is in the form of an extrudate having a diameter of 1 to 4 millimeters.
10 . A method of forming an alkane dehydrogenation catalyst, the method comprising:
forming an impregnation solution comprising a gallium precursor, an aluminum precursor, a cerium precursor, a Group 1 metal precursor, and a Group 8-11 metal precursor;
contacting the impregnation solution with a catalyst support material to deposit gallium, aluminum, cerium, the Group 1 metal, and the Group 8-11 metal on the catalyst support material and form an impregnated support;
drying the impregnated support to form a dried impregnated support; and
calcining the dried impregnated support to form the alkane dehydrogenation catalyst.
11 . The method of claim 10 , wherein the gallium precursor comprises a gallium nitrate, the aluminum precursor comprises an aluminum nitrate, the cerium precursor comprises a cerium nitrate, the Group 1 metal precursor comprises a Group 1 metal nitrate, and the Group 8-11 metal precursor comprises a Group 8-11 nitrate.
12 . The method of claim 10 , wherein the support comprises alumina or silica-modified alumina, the Group 1 metal oxide comprises potassium, and the Group 8-11 metal oxide comprises platinum.
13 . An alkane dehydrogenation catalyst formed by the method of claim 10 .
14 . A process of dehydrogenating an alkane, the process comprising:
obtaining a catalyst comprising:
a support, and
on the support, an active layer comprising
gallium oxide,
aluminum oxide,
cerium oxide,
a Group 1 metal oxide, and
a Group 8-11 metal oxide; and
contacting the alkane dehydrogenation catalyst with a feed comprising the alkane at a temperature of 450 to 800° C. to produce a product stream comprising an alkene.
15 . The process of claim 14 , wherein
the active layer comprises, based on a total weight of the alkane dehydrogenation catalyst,
0.1 to 4.0 weight percent of the gallium oxide,
1 to 10 weight percent of the aluminum oxide,
0.1 to 3 weight percent of the cerium oxide,
0.1 to 2 weight percent of potassium metal oxide, and
0.001 to 0.03 weight percent of platinum oxide; and
the support comprises alumina.