| 摘要 |
A method for the oxidative coupling of hydrocarbons, such as the oxidative coupling of methane, includes providing an oxidative catalyst inside a reactor, and carrying out the oxidative coupling reaction under a set of reaction conditions. The oxidative catalyst includes (A) at least one element selected from the group consisting of the Lanthanoid group, Mg, Ca, and the elements of Group 4 of the periodic table (Ti, Zr, and Hf); (B) at least one element selected from the group consisting of the Group 1 elements of Li, Na, K, Rb, Cs, and the elements of Group 3 (including La and Ac) and Groups 5-15 of the periodic table; (C) at least one element selected from the group consisting of the Group 1 elements of Li, Na, K, Rb, Cs, and the elements Ca, Sr, and Ba; and (D) oxygen. |
| 主权项 |
1. A method for the oxidative coupling of methane comprising:
placing a selected oxidative catalyst within a reactor, the catalyst comprising a substrate consisting essentially of a metal oxide of one or more elements selected from group (A), a promoter from group (C), and (D);wherein:
(A) is at least one element selected from the group consisting of the Lanthanoid group, Mg, and Ca; (C) is at least one element selected from the group consisting of the elements Ca, Sr, and Ba, and wherein the substrate supports the promoter; and (D) oxygen; forming an oxidative catalyst containing the selected elements; pretreating the catalyst formed thereby prior to the oxidative coupling, wherein the pretreating step includes heating the reactor containing the catalyst to a pretreatment temperature of between 800° C. and 900° C. and holding the reactor containing the catalyst at the pretreatment temperature for between 1 and 3 hours; cooling the reactor down from the pretreatment temperature to an oxidative coupling reaction temperature ranging from 500° C. to 750° C.; providing a hydrocarbon feedstream comprising methane; feeding the hydrocarbon feedstream and a gas flow comprised of oxygen to the reactor containing the oxidative catalyst; carrying out an oxidative coupling of methane within the reactor at the oxidative coupling reaction temperature to thereby form higher hydrocarbons comprised of ethane, ethylene, and combinations thereof over the oxidative catalyst according to reaction conditions; and recovering a product stream of higher hydrocarbons from the reactor. |
