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.

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.

Disclosed herein is a catalyst which comprises a silica core having an outer surface and a mesoporous silica shell having an outer surface and an inner surface with the inner surface being inside the outer surface of said mesoporous silica shell proximate to and surrounding the outer surface of said silica core. Wherein the outer surface of the mesoporous silica shell has openings leading to pores within the mesoporous silica shell which extend toward the outer surface of said silica core. The catalyst also includes catalytically active metal nanoparticles positioned within the pores proximate to said core, wherein the catalytic metal nanoparticles comprise about 0.0001 wt % to about 1.0 wt % of the catalyst. Also disclosed are methods of making the catalyst and using it to carry out a process for catalytically hydrogenolysizing a polyolefinic polymer.

A non-vanadium based metal oxide catalyst composition is provided. The catalyst composition comprises at least one metal oxide, comprising manganese oxide and being dispersed on the support, and a support comprising particles of composite oxide of aluminum and at least one metal selected from cerium, manganese and titanium, wherein aluminum is present in the composite oxide in an amount of from 50% to 80% by weight, calculated as Al.sub.2O.sub.3, based on the total weight of the composite oxide, and wherein manganese oxide is present in the metal oxide catalyst composition in an amount of from 2.5% to 10% by weight, calculated as MnO.sub.2, based on the total weight of the metal oxide catalyst composition.

A non-vanadium based metal oxide catalyst composition is provided. The catalyst composition comprises at least one metal oxide, comprising manganese oxide and being dispersed on the support, and a support comprising particles of composite oxide of aluminum and at least one metal selected from cerium, manganese and titanium, wherein aluminum is present in the composite oxide in an amount of from 50% to 80% by weight, calculated as Al.sub.2O.sub.3, based on the total weight of the composite oxide, and wherein manganese oxide is present in the metal oxide catalyst composition in an amount of from 2.5% to 10% by weight, calculated as MnO.sub.2, based on the total weight of the metal oxide catalyst composition.

A hydrogenation catalyst includes copper oxide, an alkali metal, and an acid-stabilized silica, wherein hydrogenation catalyst has a Brunauer-Emmett-Teller (BET) surface area of greater than or equal to about 15 m2/g. The hydrogenation catalysts are effective for converting aldehydes, ketones, and esters to alcohols and/or diesters to diols.

Disclosed are a dry reforming catalyst having high activity and long-term stability, and a method for preparing the dry reforming catalyst. A sol-gel reaction is performed at the interface of a catalyst for sol-gel reaction in the form of micelles to form silica particles having pores. In addition, catalyst particles of nickel or nickel oxide are formed in voids or pores of silica by using the difference in solubility in a gel state of the silica.

Disclosed are a dry reforming catalyst having high activity and long-term stability, and a method for preparing the dry reforming catalyst. A sol-gel reaction is performed at the interface of a catalyst for sol-gel reaction in the form of micelles to form silica particles having pores. In addition, catalyst particles of nickel or nickel oxide are formed in voids or pores of silica by using the difference in solubility in a gel state of the silica.

Continuous processes for making propylene glycol from ketose-yielding carbohydrates are disclosed which enhance the selectivity to propylene glycol.

Continuous processes for making propylene glycol from ketose-yielding carbohydrates are disclosed which enhance the selectivity to propylene glycol.