A method of producing an organoselenium-based nanocomposite includes acid-treating a mixture containing multi-walled carbon nanotubes (MWCNT) and palm waste with phosphoric acid to form an acid-treated mixture; carbonizing the acid-treated mixture to form a MWCNT/biochar; mixing the MWCNT-biochar with TiO.sub.2 nanoparticles to form a TiO.sub.2-MWCNT/biochar; chlorinating acyl groups present on the TiO.sub.2-MWCNT/biochar to form a chlorinated TiO.sub.2-MWCNT/biochar; reacting the chlorinated TiO.sub.2-MWCNT/biochar with an organoselenium compound to form a SeTiO.sub.2-MWCNT/biochar.

A method of producing an organoselenium-based nanocomposite includes acid-treating a mixture containing multi-walled carbon nanotubes (MWCNT) and palm waste with phosphoric acid to form an acid-treated mixture; carbonizing the acid-treated mixture to form a MWCNT/biochar; mixing the MWCNT-biochar with TiO.sub.2 nanoparticles to form a TiO.sub.2-MWCNT/biochar; chlorinating acyl groups present on the TiO.sub.2-MWCNT/biochar to form a chlorinated TiO.sub.2-MWCNT/biochar; reacting the chlorinated TiO.sub.2-MWCNT/biochar with an organoselenium compound to form a SeTiO.sub.2-MWCNT/biochar.

The invention concerns a process for preparing a chlorine comprising catalyst by (a) providing a Fischer-Tropsch catalyst comprising titania and at least 5 weight percent cobalt; (b) impregnating the catalyst with a solution comprising chloride ions; and (c) heating the impregnated catalyst at a temperature in the range of between 100 and 500 C. for at least 5 minutes up to 2 days. The prepared catalyst preferably comprises 0.13-3 weight percent of the element chlorine. The invention further relates to the prepared catalyst and its use.

The invention concerns a process for preparing a chlorine comprising catalyst by (a) providing a Fischer-Tropsch catalyst comprising titania and at least 5 weight percent cobalt; (b) impregnating the catalyst with a solution comprising chloride ions; and (c) heating the impregnated catalyst at a temperature in the range of between 100 and 500 C. for at least 5 minutes up to 2 days. The prepared catalyst preferably comprises 0.13-3 weight percent of the element chlorine. The invention further relates to the prepared catalyst and its use.

The invention relates to a method to start up a Fischer-Tropsch process. A catalyst with a latent activity is used. The catalyst comprises titania, cobalt, promoter, and chlorine. The catalyst comprises more than 0.7 and less than 4 weight percent of the element chlorine, calculated on the total weight of the catalyst.

The invention relates to a method to start up a Fischer-Tropsch process. A catalyst with a latent activity is used. The catalyst comprises titania, cobalt, promoter, and chlorine. The catalyst comprises more than 0.7 and less than 4 weight percent of the element chlorine, calculated on the total weight of the catalyst.

The present invention discloses processes for alkylating an aromatic compound, such as benzene or toluene, using a chemically-treated solid oxide. Suitable chemically-treated solid oxides include fluorided silica-coated alumina and fluorided-chlorided silica-coated alumina.

A composition comprising an extruded inorganic support comprising an oxide of a metal or metalloid, and at least one catalytically active metal, wherein the extruded inorganic support has pores, a total pore volume, and a pore size distribution, wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum, wherein a first peak has a first maximum of pore diameters of equal to or greater than about 120 nm and a second peak has a second maximum of pore diameters of less than about 120 nm, and wherein greater than or equal to about 5% of a total pore volume of the extruded inorganic support is contained within the first peak of pore diameters.

A composition comprising an extruded inorganic support comprising an oxide of a metal or metalloid, and at least one catalytically active metal, wherein the extruded inorganic support has pores, a total pore volume, and a pore size distribution, wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum, wherein a first peak has a first maximum of pore diameters of equal to or greater than about 120 nm and a second peak has a second maximum of pore diameters of less than about 120 nm, and wherein greater than or equal to about 5% of a total pore volume of the extruded inorganic support is contained within the first peak of pore diameters.

The present invention provides a heterogeneous metal-free Fenton catalyst, a method for preparing the same and use thereof. The catalyst is a carbon-based material surface-bonded with halogenated quinones, wherein the carbon-based material has synergistic action with halogenated quinones. The catalyst is prepared by grafting halogenated quinones onto the carbon-based material, or feeding chlorine during the carbonation process of the carbon-based material for oxidization. The production of hydroxyl radicals by using the catalyst has a low cost and a safe, simple and convenient process. The conditions for producing hydroxyl radicals are mild, without any secondary pollution. Moreover, the radical production has a high, continuous and stable yield, and the hydroxyl radicals can be effectively produced by using no chemicals which are harmful to human bodies, without any side product and any additional substances which are difficult to separate. The catalyst has a great application value in the fields of organic pollutant degradation.