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A kind of active ammonia storage active mixture of magnesium salt and its preparation

A technology for active mixtures and mixtures, applied in ammonia compounds, chemical instruments and methods, fuel cells, etc., can solve the problems that technicians cannot implement, and do not have clear claims and details, so as to reduce or avoid agglomeration and high practicality. Value, effect of improving mechanical strength

Active Publication Date: 2016-01-20
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent uses solid material for direct compression molding, uses binder, only declares that it may be silica fiber binder, and does not add the proportion, and other claims and examples only state that the solid material may include Composition of granular materials, porous materials, crystalline materials, amorphous materials or their combinations, without clear claim details, it is almost impossible for those skilled in the industry to implement

Method used

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  • A kind of active ammonia storage active mixture of magnesium salt and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 69 parts of magnesium chloride, 3 parts of molecular sieves, 8 parts of industrial ball clay and 12 parts of water in a high-speed mixer for 1 hour, add 8 parts of ethanol, and continue mechanical stirring for 3 hours to make a uniform mixture of wet materials and fill them into the tank Add to 80% of the tank volume, and mechanically shake for 10 minutes to eliminate the air gap;

[0027] The whole tank is put into a vacuum oven, such as figure 1 Under the normal pressure shown, increase the temperature to 120°C at a rate of 2°C / min, keep the temperature for 6 hours, remove water and ethanol, evacuate step by step to 550mbar, keep the temperature and pressure for 1h, take out the tank, seal the feeding port, and make ammonia storage The active mixture is a monolithic porous solid block.

Embodiment 2

[0029] Mix 2 parts of molecular sieves, 18 parts of industrial ball clay and 15 parts of water in a high-speed mixer for 1 hour, add 55 parts of magnesium chloride and mix for 1 hour, add 10 parts of ethanol, and continue to stir mechanically for 3 hours to make a uniform mixture. Add to the tank, add to 75% of the tank volume, and mechanically shake for 10 minutes to eliminate the air gap;

[0030] Put the whole tank into a vacuum oven, raise the temperature to 120 °C at a rate of 2 °C / min under normal pressure, keep the temperature for 6 hours, remove water and ethanol, evacuate step by step to 550 mbar, keep the temperature and pressure for 1 hour, take out the tank, The feeding port is sealed to form an integral porous solid block of the ammonia storage active mixture.

Embodiment 3

[0032] Mix 5 parts of industrial ball clay and 6 parts of water in a high-speed mixer for 1 hour, add 80 parts of magnesium chloride and mix for 1 hour, add 3 parts of molecular sieves and mix for 1 hour, add 6 parts of ethanol, and continue mechanical stirring for 3 hours to make a uniform mixture. material, filled into the tank, added to 80% of the volume of the tank, and mechanically shaken for 10 minutes to eliminate the air gap;

[0033] Put the whole tank into a vacuum oven, raise the temperature to 100 °C at a rate of 5 °C / min under normal pressure, keep the temperature constant for 8 hours, remove water and ethanol, evacuate step by step to 550 mbar, keep the constant temperature and pressure for 2 hours, take out the tank, The feeding port is sealed to form an integral porous solid block of the ammonia storage active mixture.

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Abstract

The invention relates to an active ammonia storage mixture of magnesium salt and its preparation, which is characterized in that: the powder of industrial anhydrous magnesium chloride salt is used, mixed with an appropriate amount of molecular sieve, clay, deionized water and industrial alcohol, and mechanically stirred to make half Dry uniformly mixed wet materials are filled into the tank to make a whole porous solid block. The ammonia gas transmission channels in the solid block are rich, and there are several large pores in the macroscopic view, which have faster ammonia filling and better storage capacity. Ammonia performance, can release ammonia gas quickly, can be recycled without breaking, has high-efficiency adsorption and desorption characteristics, suitable for adsorption and storage of ammonia gas, used in SCR and FCEV systems, and meets the application requirements of the future automotive industry.

Description

technical field [0001] The invention relates to a magnesium salt ammonia storage active mixture and a preparation method thereof, which are applied to an SCR post-treatment system of automobile tail gas and an FCEV fuel cell system. Background technique [0002] At present, the world is facing comprehensive challenges of energy and environment. People are still facing many problems in the selection of technical means to meet the emission standards of traditional vehicles, and in the fuel supply technology of new energy vehicles. [0003] The SCR post-treatment system relies on the accurate supply of urea reducing agent and decomposes it into ammonia gas at the front end of the catalyst to remove NOX hazards, so as to purify the exhaust gas and achieve the vehicle's National 4 or above standards. However, in actual use Among them, there are many deficiencies and difficulties in the metered injection of liquid urea that relies on urea decomposed into ammonia gas. For example,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/00H01M8/06B01J20/18B01J20/30B01D53/56B01D53/76
Inventor 张克金崔龙荣常如米新艳张苡铭张喆魏晓川刘国军
Owner CHINA FIRST AUTOMOBILE