High mechanical strength ammonia storage mixture containing ceramic fiber and preparation method thereof

Abstract

The invention relates to a high-mechanical strength stored ammonia mixture containing a ceramic fiber. The high-mechanical strength stored ammonia mixture contains anhydrous magnesium chloride, the ceramic fiber and industrial clay. The high-mechanical strength stored ammonia mixture is characterized in that the preparation method comprises the steps of: forming mixture by industrial anhydrous magnesium chloride powder, the ceramic fiber, the industrial clay and industrial alcohol; uniformly agitating the mixture by an agitator, forming semi-drying mixture powder; adding the semi-drying mixture powder to an open sealed container to mechanically oscillate, forming a wet sample block, and drying the sample block for 2-3 hours under the condition that the temperature is 60-80 DEG C and the vacuum degree is 1-10pa to 1Kpa. The prepared storage ammonia mixture has super-strong adsorptive capacity, stable structure and high mechanical strength; in a process of preparing the active stored ammonia mixture, proper industrial clay is also added. Clay mineral has plasticity after being humidified by water, and can deform and keep an original shape for a long time under smaller pressure; the specific surface area is large, and the particles have electronegativity, so the high-mechanical strength stored ammonia mixture has good physical adsorbability and surface chemical activity, and the viscosity and adsorbability of the mixture can be further improved.

Description

technical field [0001] The invention relates to a high-mechanical-strength ammonia storage mixture containing ceramic fibers and a preparation method thereof, which are applied to a post-treatment system of automobile exhaust and a hydrogen fuel cell system of a new energy automobile. Background technique [0002] Today, the world is facing the dual challenges of energy crisis and environmental crisis. 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] In terms of traditional automobiles, the SCR aftertreatment system relies on the precise supply of urea reducing agent and decomposes it into ammonia at the front end of the catalyst to remove NOX hazards, thereby achieving the purpose of purifying exhaust gas. However, in actual use, there are many deficiencies and difficulties in the metered injection of liquid urea that relies on...

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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

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