14-03-2019 дата публикации
Номер: US20190077728A1
Автор:
Alcid Marian,
Cizeron Joel M.,
Gamoras Joel,
McCormick Jarod,
Nyce Greg,
Ras Erik-Jan,
Rosenberg Daniel,
Rumplecker Anja,
Schammel Wayne P.,
Scher Erik C.,
Zurcher Fabio R.
Принадлежит:
Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogenous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed. 140-. (canceled)41. A catalyst comprising a mixed oxide of a lanthanide and tungsten , wherein the catalyst further comprises a sodium dopant and at least one doping element from groups 2 , 4-15 , lanthanides or combinations thereof , wherein the catalyst comprises a Cselectivity of greater than 50% and a methane conversion of greater than 20% when the catalyst is employed as a heterogeneous catalyst in the oxidative coupling of methane at a temperature of 750° C. or less.42. The catalyst of claim 41 , wherein the lanthanide is Ce claim 41 , Pr claim 41 , Nd claim 41 , La claim 41 , Eu claim 41 , Sm or Yb.43. The catalyst of claim 41 , wherein the at least one doping element is Fe claim 41 , Co claim 41 , Mn claim 41 , Cu claim 41 , Ni claim 41 , Sr claim 41 , Ga claim 41 , Zr claim 41 , Pb claim 41 , Zn claim 41 , Cr claim 41 , Pt claim 41 , Al claim 41 , Nb claim 41 , La claim 41 , Ba claim 41 , Bi claim 41 , Sn claim 41 , In claim 41 , Ru claim 41 , P or combinations thereof.44. A catalyst comprising a rare earth oxide and two or more dopants claim 41 , wherein the catalyst comprises a Cselectivity of greater than 50% and a methane conversion of greater than 20% when the catalyst is employed as a heterogeneous catalyst in the oxidative coupling of methane at a temperature of 750° C. or less claim 41 , and wherein the dopant comprises Eu/Na claim 41 , Sr/Na claim 41 , Na/Zr/Eu/Ca claim 41 , Mg/Na claim 41 , Sr/Sm/Ho/Tm claim 41 , Sr/W claim 41 , Mg/La/K claim 41 , Na/K/Mg/Tm claim 41 , Na/Dy/K claim 41 , Na/La/Dy claim 41 , Na/La/Eu claim 41 , Na/La/Eu/In claim 41 , Na/La/K claim 41 , Na/La/Li/Cs claim 41 , K/La claim 41 , K/La/S claim 41 , K/Na claim ...
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