The method of producing ammonia

 

(57) Abstract:

The invention relates to the production of ammonia. The method of producing ammonia from hydrocarbons, water vapor, air, includes compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression, synthesis of ammonia in a closed loop, where the original air add carbon dioxide in the amount of 0.001-0,124 from the amount of the resulting mixture and the mixture is sent to a steam-catalytic conversion of methane. The technical result is to reduce the specific consumption of hydrocarbons.

The invention relates to the production of ammonia and can be used in the chemical industry. A method of obtaining ammonia from hydrocarbons, water vapor, air, oxygen, including cleaning of the raw material from sulfur compounds, processoriomodule catalytic conversion of methane in the mine Converter, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compressing and holding the synthetic is oversee methane. The closest in technical essence and the achieved result to the described invention is a method of producing ammonia from hydrocarbons, water vapor, air, including compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression and synthesis of ammonia in a closed loop (2).

This method is characterized by high specific consumption of hydrocarbons due to the feed vapor conversion of methane to oxygen in amounts greater than required for the mine Converter methane Autoterminal mode. Oxygen binds with hydrogen and is then output from the system in the form of water. Less feeding oxygen because the quantity supplied to a steam-methane conversion of oxygen depends on the stoichiometric ratio between the main components of the gas mixture, which should be (H2+CO)/N2=3,0...3.04 from.

The objective of the invention is the reduction of specific consumption of hydrocarbons. This object is achieved in that SPCU raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression and synthesis of ammonia in a closed loop according to the invention, the air add carbon dioxide and the mixture is sent to a steam-catalytic conversion of methane.

The proportion of carbon dioxide in deoxycorticosterone mixture is directed to a steam-catalytic conversion of methane 0.001-0,124.

The invention is illustrated by the following examples.

Example 1.

Power unit 57,95 t/h. Ammonia is produced from hydrocarbons, water vapor and air is withdrawn from the atmosphere and cleaned from dust, which komprimiert, clean raw materials from sulfur compounds on the catalyst at a temperature of 400oTo conduct steam at a temperature of 760-825oWith and vapor catalytic conversion of methane at the temperature at the outlet 990-1002oWith, treatment received nitric mixture of oxygenated compounds, komprimiert and carry out the synthesis of ammonia in a closed loop. To the air in quantities 50375 nm3/hour add 50,37 nm3per hour dioxide pleany consumption of hydrocarbons is reduced by 0,145% (calculated using equation katipamula transition" (3).

Example 2.

The original data in example 2 are the same as in example 1, except that the air of 50375 nm3/hour add 6246,5 nm3per hour of carbon dioxide (0,124 from the air) and this mixture is sent to a steam-catalytic conversion of methane. In this case, the amount of heat resulting from the exothermic reactions is equal to the amount of heat consumed by the endothermic reactions. That is, to increase the amount of carbon dioxide above the specified level is impractical. The specific consumption of hydrocarbon mixtures, defined by the equation "katipamula transition is reduced by 17,97% (calculated using equation katipamula transition" (3).

The given examples show that using the mixture of air and carbon dioxide in vapor phase catalytic conversion decreases the consumption of hydrocarbons by more than 17%, with large volumes of raw materials provides a significant positive result.

The examples show that outside the designated boundaries of 0.001-0,124 to achieve tangible economic effect cannot. If the value is less than 0.001 effect due to small values, priamry methane, so as not to be missed heat conducting endothermic reactions.

Sources of information

1. Directory of apothica. So 1, M, 1967, S. 95-98, 211, 366.

2. Directory of apothica. M, Chemistry, 1986, S. 83-85, 213, 222, 360-364.

3. The Leites, I. L., Sosna, M. H., B. N. Semenov Theory and practice of chemical technologies. M, Chemistry, 1988, S. 165-166.

The method of producing ammonia from hydrocarbons, water vapor, air, including compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression and synthesis of ammonia in a closed loop, wherein the air add carbon dioxide in the amount of 0.001-0,124 from the amount of the resulting mixture, this mixture is sent to a steam-catalytic conversion of methane.

 

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FIELD: hydrocarbon conversion catalysts.

SUBSTANCE: catalyst for generation of synthesis gas via catalytic conversion of hydrocarbons is a complex composite composed of ceramic matrix and, dispersed throughout the matrix, coarse particles of a material and their aggregates in amounts from 0.5 to 70% by weight. Catalyst comprises system of parallel and/or crossing channels. Dispersed material is selected from rare-earth and transition metal oxides, and mixtures thereof, metals and alloys thereof, period 4 metal carbides, and mixtures thereof, which differ from the matrix in what concerns both composition and structure. Preparation procedure comprises providing homogenous mass containing caking-able ceramic matrix material and material to be dispersed, appropriately shaping the mass, and heat treatment. Material to be dispersed are powders containing metallic aluminum. Homogenous mass is used for impregnation of fibrous and/or woven materials forming on caking system of parallel and/or perpendicularly crossing channels. Before heat treatment, shaped mass is preliminarily treated under hydrothermal conditions.

EFFECT: increased resistance of catalyst to thermal impacts with sufficiently high specific surface and activity retained.

4 cl, 1 tbl, 8 ex

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