The method of preparation of the catalyst for combustion of fuel

 

(57) Abstract:

Usage: in the preparation of catalysts for the combustion of fuel in the catalytic heaters. Essence: as an active iron-containing component used slurry micaceous iron galvanic production wastes, as a binder is a mixture of natural materials, containing in its composition aluminum oxide, clay, kaolin, as well as a hardening additive - tremolite or wollastonite, talc and a pore-forming additive is active carbon. The mixture is milled until smooth, add water and industrial oil and formed into blanks of the desired shape, for example, by pressing, then dried and calcined. table 1.

The invention relates to the field of catalytic combustion, namely the combustion of gaseous hydrocarbon fuel in the catalytic heaters.

Known for a diverse composition of the catalysts of honeycomb structure for burning fuels, including micaceous iron catalysts, which receive the high-temperature solid-phase synthesis of the corresponding oxides. This method is taken as a prototype. According to he used for solid-phase synthesis by annealing. The obtained metal oxide (or mixed oxides with spinel structure, perovskite), for example, MgAl2O4and NiAl2O4or Al2O3and Fe2O3or LaAlO3and LaCrO3, crushed, mixed, for example, in a ball mill until the particle size of 10-20 microns. The powder mixture is then formed (pressed) into blanks of the desired shape and is sintered at a temperature below 1000aboutC. the Known method also provides the option of preparation of the catalyst, when powdered mixture of active components and a binder in the form of an aqueous suspension is applied on a temporary (burnable) form, such as paper, and then is sintered at a high temperature.

Method [1] is a complex, time-consuming and involves the use of specially prepared reagents salts of the respective metals.

The purpose of the invention to simplify the method of obtaining micaceous iron catalyst by solid-phase synthesis of cheap natural and recyclable oxide materials.

To do this, as the active iron-containing component used slurry micaceous iron galvanic production wastes, as a binder a mixture of natural materials containing the oxide aluminum oxide aluminum with the formation of solid solutions, having a high activity in the deep oxidation of hydrocarbons. In addition, the use of sludge for the preparation of catalysts simultaneously decide their effective utilization.

Distinctive features of the prototype features are:

the introduction of the catalyst iron galvanostatic as catalytically active metal oxides;

introduction to the catalyst composition of natural materials containing aluminum oxide: clay, kaolin, strengthening and plasticizing additives, talc, tremolite or wollastonite, a pore-forming additive activated carbon.

The composition of galvanic sludge, wt.

Fe2O340

ZnO 9

NiO 10

Impurity oxides

manganese, vanadium,

titanium and other Things.

Evaluation of catalytic activity of the catalysts was conducted on a laboratory bench that simulates the catalytic heater. The cost of the propane-butane mixture and air was 20 and 575 l/h, respectively. Through the sampler installed at a height of 5 mm above the surface of the heater, the oxidation products were submitted to the chromatograph "Gazprom", which determined the CO content in the exhaust gas. Table prolactina from shrinking to a jaw crusher, and then disk mill to a particle size of 50 μm. Milled powders were loaded into the mixer in the following amounts, by weight.h. the 150 galvanic sludge, clay refractory 150, kaolin 50, talc 50, charcoal brand BAU-B 8, wollastonite 10 and added to 150 wt.h. water. Next to the mixer was added industrial grade oil And-20-And-10 wt. including the Mixing was carried out for 1 h At a special press-snap-produced molding honeycomb ceramic tiles size HH mm channel diameter of 1 mm 30 PCs/cm2(the living section of 0.2). Then the ceramic tiles were placed in a drying chamber with a temperature of 255aboutC. After 5 h provyalennuyu tiles were dried at 120aboutC for 15 h and then was progulivali in a muffle furnace at 850aboutC for 4 h

P R I m m e R 2. The galvanic sludge, refractory clay, kaolin, talc, coal, wollastonite were crushed in a jaw crusher, and then the disk mill to a particle size of 50 μm. Milled powders were loaded into the mixer in the following amounts, by weight. including galvanic sludge 75, clay refractory 180, kaolin 60, talc 60, charcoal brand BAU-B 6, wollastonite 30 and added 140 wt. including water. Next to the mixer was added industrial grade oil And-20-And-10 may tiles size HH mm channel diameter of 1 mm 30 PCs/cm2(the living section of 0.2). Then the ceramic tiles were placed in a drying chamber with a temperature of 255aboutC. After 5 h provyalennuyu tiles were dried at 120aboutC for 15 h and then was progulivali in a muffle furnace at 900aboutC for 4 h

P R I m e R 3. Hawaleshka, refractory clay, kaolin, talc, coal, wollastonite were crushed in a jaw crusher, and then the disk mill to a particle size of 50 μm. Milled powders were loaded into the mixer in the following amounts, by weight.h. the 300 galvanic sludge, clay refractory 100, kaolin 20, talc 50, charcoal brand BAU-B 11, wollastonite 8 and added 170 wt. including water. Next to the mixer was added industrial grade oil And-20-a in the amount of 12 wt.h. Mixing was carried out for 1 h At a special press-snap-produced molding honeycomb ceramic tiles size HH mm channel diameter of 1 mm 30 PCs/cm2(the living section of 0.2). Then the ceramic tiles were placed in a drying chamber with a temperature of 255aboutC. After 5 h provyalennuyu tiles were dried at 120aboutC for 15 h and then was progulivali in a muffle furnace at 800aboutC for 4 h

P R I m e R 4. The galvanic sludge, refractory clay, kaolin, talc, coal, tremolet of ismel mixer in the following quantities, wt. including galvanic sludge 100, clay refractory 170, kaolin 50, talc 40, charcoal brand BAU-B 5, tremolite 15 and added 120 wt.h. water. Next to the mixer was added industrial grade oil And-20-a in the amount of 8 wt.h. Mixing was carried out for 1 h At a special press-snap-produced molding honeycomb ceramic tiles size HH mm channel diameter of 1 m 30 PCs/cm2(the living section of 0.2). Then the ceramic tiles were placed in a drying chamber with a temperature of 255aboutC. After 5 h provyalennuyu tiles were dried at 120aboutC for 15 h and then was progulivali in a muffle furnace at 800aboutC for 4 h

P R I m e R 5. Hawaleshka, refractory clay, kaolin, talc, coal, tremolite were crushed in a jaw crusher, and then the disk mill to a particle size of 50 μm. Milled powders were loaded into the mixer in the following amounts, by weight.h. the galvanic sludge 200, clay refractory 120, kaolin 50, talc 50, charcoal brand BAU-B 10, tremolite 20 and added 160 wt.h. water. Next to the mixer was added industrial grade oil And-20-And-10 wt. including the Mixing was carried out for 1 h At a special press-snap-produced molding honeycomb ceramic tiles size was memali in a drying chamber with a temperature of 255aboutC. After 5 h provyalennuyu tiles were dried at 120aboutC for 15 h and then was progulivali in a muffle furnace at 900aboutC for 4 h

As can be seen from the examples presented, obtained by the proposed method catalysts while maintaining high mechanical strength have high activity in the process of fuel combustion, resulting in small content in the exhaust gases.

The METHOD of preparation of the CATALYST FOR combustion of FUEL containing oxides of iron and aluminum, comprising a mixture of catalytically active metal oxides with inorganic binders, grinding to obtain a homogeneous mixture, the formation of a preform of the desired shape and annealing, characterized in that the catalytically active components used slurry of iron-containing waste electroplating, and as a binder a mixture of natural materials containing aluminum oxide: clay, kaolin, as well as inorganic additives talc, wollastonite or tremolite and additionally introduced into the mass at the stage of mixing a pore-forming additive charcoal.

 

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