High-thermal conductivity eggshell type catalyst carrier and preparation method and application

Abstract

The invention relates to a high-thermal conductivity eggshell type catalyst carrier which is a metal ball, wherein the range of the average particle diameter of the metal ball is 1 to 5 mm, the specific surface area is 70 to 600 m<2> / g, the average pore diameter is 4 to 60 nm, the pore volume is 0.25 to 2.00 cm<3> / g, the thickness of a corrosion layer of the metal ball is 0.05 to 0.25 mm, and the corrosion layer is made of metal oxides. The high-thermal conductivity eggshell type catalyst carrier has the advantages of simplicity in preparation and controllable thickness of a shell layer and is suitable for large-scale industrial production.

Description

technical field

[0001] The invention relates to a catalyst carrier, in particular to an eggshell catalyst carrier with high thermal conductivity, a preparation method and application. Background technique

[0002] As we all know, the reactors used in industrial production include slurry bed reactors, fluidized bed reactors, fixed bed reactors, and the like. Among them, the fixed-bed reactor has the advantages of simple design, simple operation, and easy separation of products, so it has become the most commonly encountered system in the field of catalytic technology. However, in practical applications, fixed-bed reactors also have shortcomings, that is, heat transfer and mass transfer problems during the reaction process. In a fixed-bed reactor, for highly exothermic reactions, due to the poor thermal conductivity of the loaded catalyst particles, it is very easy to cause local overheating of the catalyst bed, and even a "flying temperature" phenomenon occurs in severe case...

Examples

Embodiment 1

[0032] Catalyst carrier preparation: put metal aluminum balls (particle size 2 mm) into distilled water and boil for 6 hours, filter, and dry the filter cake at 60° C. for 10 hours. Drop 2L of 1.0mol / L sodium hydroxide solution into the obtained material at a rate of 2ml / min, and treat with electromagnetic stirring for 10h, filter, wash until neutral, dry the filter cake at 100°C for 15h, and after drying, Baking at 400° C. for 8 hours in a nitrogen atmosphere to obtain a metal aluminum ball carrier with an outer layer of alumina and an inner layer of uncorroded metal aluminum. The particle size of the obtained metal aluminum ball carrier is 2mm, the thickness of the corrosion layer is 0.15mm, and the specific surface is 175m 2 / g, the average pore diameter is 15nm, and the pore volume is 0.36cm 3 / g.

[0033] Catalyst preparation: account for 15 (wt)% of final catalyst by weighing Co(NO 3 ) 2 ·6H 2 O, measure deionized water according to the equal-volume impregnation met...

Embodiment 2

[0036]Catalyst carrier preparation: put metal aluminum balls (particle size 3 mm) into distilled water and boil for 6 hours, filter, and dry the filter cake at 60° C. for 10 hours. Drop 5L of 2.0mol / L sodium hydroxide solution into the obtained material at a rate of 5ml / min, and treat with electromagnetic stirring for 10h, filter, wash until neutral, dry the filter cake at 100°C for 15h, and after drying, Calcined at 400°C for 8 hours to obtain a metal aluminum ball carrier whose outer layer is alumina and whose inner layer is uncorroded metal aluminum. The particle size of the obtained metal aluminum ball carrier is 3mm, the thickness of the corrosion layer is 0.20mm, and the specific surface is 260m 2 / g, the average pore diameter is 12nm, and the pore volume is 0.42cm 3 / g.

[0037] Catalyst preparation: account for 25 (wt)% and 5 (wt)% of final catalyst by iron oxide and manganese oxide respectively, take by weighing Fe(NO 3 ) 3 9H 2 O and Mn(NO 3 ) 2 4H 2 O, measu...

Embodiment 3

[0040] Catalyst carrier preparation: put magnesium-aluminum alloy balls (mass percentage: Mg5%Al95%, particle size: 4mm) into distilled water and boil for 6 hours, filter, and dry the filter cake at 60°C for 10 hours. Drop 5L of 1.0mol / L hydrochloric acid solution into the obtained material at a rate of 5ml / min, and treat with electromagnetic stirring for 6h, filter, wash until neutral, dry the filter cake at 80°C for 9h, and then dry it at 350°C Lower roasting for 10 hours to obtain a metal magnesium-aluminum alloy ball carrier in which the outer layer is magnesium oxide and the inner layer of aluminum oxide is uncorroded metal material. The particle size of the metal magnesium aluminum alloy ball carrier is 4mm, the thickness of the corrosion layer is 0.22mm, and the specific surface is 402m 2 / g, the average pore diameter is 6nm, and the pore volume is 0.71cm 3 / g.

[0041] Catalyst preparation: account for 3 (wt)% of final catalyst by weighing Ru(NO)(NO 3 ) 3 , Measure...

technical field

[0001] The invention relates to a catalyst carrier, in particular to an eggshell catalyst carrier with high thermal conductivity, a preparation method and application. Background technique

[0002] As we all know, the reactors used in industrial production include slurry bed reactors, fluidized bed reactors, fixed bed reactors, and the like. Among them, the fixed-bed reactor has the advantages of simple design, simple operation, and easy separation of products, so it has become the most commonly encountered system in the field of catalytic technology. However, in practical applications, fixed-bed reactors also have shortcomings, that is, heat transfer and mass transfer problems during the reaction process. In a fixed-bed reactor, for highly exothermic reactions, due to the poor thermal conductivity of the loaded catalyst particles, it is very easy to cause local overheating of the catalyst bed, and even a "flying temperature" phenomenon occurs in severe case...

Examples

Embodiment 1

[0032] Catalyst carrier preparation: put metal aluminum balls (particle size 2 mm) into distilled water and boil for 6 hours, filter, and dry the filter cake at 60° C. for 10 hours. Drop 2L of 1.0mol / L sodium hydroxide solution into the obtained material at a rate of 2ml / min, and treat with electromagnetic stirring for 10h, filter, wash until neutral, dry the filter cake at 100°C for 15h, and after drying, Baking at 400° C. for 8 hours in a nitrogen atmosphere to obtain a metal aluminum ball carrier with an outer layer of alumina and an inner layer of uncorroded metal aluminum. The particle size of the obtained metal aluminum ball carrier is 2mm, the thickness of the corrosion layer is 0.15mm, and the specific surface is 175m 2 / g, the average pore diameter is 15nm, and the pore volume is 0.36cm 3 / g.

[0033] Catalyst preparation: account for 15 (wt)% of final catalyst by weighing Co(NO 3 ) 2 ·6H 2 O, measure deionized water according to the equal-volume impregnation met...

Embodiment 2

[0036]Catalyst carrier preparation: put metal aluminum balls (particle size 3 mm) into distilled water and boil for 6 hours, filter, and dry the filter cake at 60° C. for 10 hours. Drop 5L of 2.0mol / L sodium hydroxide solution into the obtained material at a rate of 5ml / min, and treat with electromagnetic stirring for 10h, filter, wash until neutral, dry the filter cake at 100°C for 15h, and after drying, Calcined at 400°C for 8 hours to obtain a metal aluminum ball carrier whose outer layer is alumina and whose inner layer is uncorroded metal aluminum. The particle size of the obtained metal aluminum ball carrier is 3mm, the thickness of the corrosion layer is 0.20mm, and the specific surface is 260m 2 / g, the average pore diameter is 12nm, and the pore volume is 0.42cm 3 / g.

[0037] Catalyst preparation: account for 25 (wt)% and 5 (wt)% of final catalyst by iron oxide and manganese oxide respectively, take by weighing Fe(NO 3 ) 3 9H 2 O and Mn(NO 3 ) 2 4H 2 O, measu...

Embodiment 3

[0040] Catalyst carrier preparation: put magnesium-aluminum alloy balls (mass percentage: Mg5%Al95%, particle size: 4mm) into distilled water and boil for 6 hours, filter, and dry the filter cake at 60°C for 10 hours. Drop 5L of 1.0mol / L hydrochloric acid solution into the obtained material at a rate of 5ml / min, and treat with electromagnetic stirring for 6h, filter, wash until neutral, dry the filter cake at 80°C for 9h, and then dry it at 350°C Lower roasting for 10 hours to obtain a metal magnesium-aluminum alloy ball carrier in which the outer layer is magnesium oxide and the inner layer of aluminum oxide is uncorroded metal material. The particle size of the metal magnesium aluminum alloy ball carrier is 4mm, the thickness of the corrosion layer is 0.22mm, and the specific surface is 402m 2 / g, the average pore diameter is 6nm, and the pore volume is 0.71cm 3 / g.

[0041] Catalyst preparation: account for 3 (wt)% of final catalyst by weighing Ru(NO)(NO 3 ) 3 , Measure...