Porous solid sample block of ammonia storage active mixture containing industrial clay and preparation method thereof

Abstract

The invention relates to a porous solid sample block of an ammonia storage active mixture containing industrial clay, which is composed of anhydrous strontium chloride, industrial clay and activated carbon with a high specific surface area, and is characterized by a preparation method thereof, and the specific steps are as follows: Industrial anhydrous strontium chloride salt powder 36~80wt%, industrial clay 4~24wt%, high specific surface area activated carbon 2~7wt%, deionized water 4~12wt% and industrial alcohol composition mixture 5~26wt%, stirred by a mixer Evenly, stir for 1~10h to form a semi-dry mixed powder; add the powder into an open airtight container for mechanical vibration for 30~60min, and then at 60~80℃, the vacuum degree is 10-1~ Dry at 1Kpa for 1~3h, or at 90~100℃ for 3~4h. The ammonia storage mixture porous solid sample containing metal salt and industrial clay prepared by it not only ensures the ammonia storage characteristics of the metal salt but also effectively improves the viscosity and mechanical strength of the mixture sample. In the process of sample block, an appropriate amount of activated carbon with high specific surface area is also added, which improves the adsorption characteristics of the mixture sample block and increases the number of macroscopic pores of the mixture sample block.

Description

technical field [0001] The invention relates to a porous solid sample block of an ammonia storage active mixture containing industrial clay 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] Energy and environmental issues are two very difficult issues that human beings must face in the 21st century. People still face many problems in terms of meeting emission standards for traditional vehicles and fuel supply for new energy vehicles. The SCR post-treatment system of automobile exhaust gas relies on the precise supply of urea reducing agent and decomposes it into ammonia gas at the front end of the catalyst, and then removes NOX harmful substances to achieve the purpose of purifying exhaust gas. However, in actual use, there are many shortcomings and difficulties in the metered injection of liquid urea that relies on the decomposition of urea into ammonia gas....

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Problems solved by technology

However, this patent uses solid material for direct compression molding, uses a binder, only states that it may be a silica fiber binder, and does not have a dosage ratio, and other claims and examples only declare solid materials It may include 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

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