Columnar cocoanut shell activated carbon and preparation method thereof

Abstract

The invention provides columnar cocoanut shell activated carbon with high strength and high mesoporosity and a preparation method of the columnar cocoanut shell activated carbon. The columnar cocoanut shell activated carbon has the side pressure of 210N / cm, the strength of larger than or equal to 95% and the mesoporosity of 70-90%. The preparation method of the columnar cocoanut shell activated carbon comprises the steps of crushing and sieving pretreated cocoanut shells; uniformly mixing wood powder with a certain particle size and a specific organic binder; adding phosphoric acid and a proper amount of water according to a certain phosphorus / wood ratio; and sequentially dipping, kneading, carrying out extrusion molding, curing, carbonizing, activating, washing and drying to obtain the columnar cocoanut shell activated carbon. Through condition control, the columnar cocoanut shell activated carbon has the specific surface area of 900-1600 m<2> / g, the pore volume of 0.4-0.8 cm<3> / g and the mesoporosity of 70-90% within a certain high-strength range, and the controllability is also one of the advantages of the columnar cocoanut shell activated carbon. Due to the adoption of a porous structure with high strength and high mesoporosity, the columnar cocoanut shell activated carbon can be used as a solid catalyst in a fixed bed reactor and is wide in application prospect in the catalysis field.

Description

technical field [0001] The invention belongs to the field of preparation of activated carbon materials, and in particular relates to a columnar coconut shell activated carbon and a preparation method thereof. Background technique [0002] Due to the messy and irregular arrangement of carbon atoms in the plane layer of activated carbon into a "helical structure", and they are all combined with each other by intermolecular force, the wear resistance and compressive strength of activated carbon are very poor. At the same time, activated carbon, as a catalyst carrier, is more and more used in the field of catalysis, and shaped activated carbon with a certain strength and pore structure is increasingly valued by people. [0003] The preparation of shaped activated carbon can generally be divided into two categories: one is to prepare shaped activated carbon from carbonaceous precursors, and the other is to directly prepare shaped activated carbon from powdered activated carbon as...

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Problems solved by technology

In the traditional preparation method, related patents also involve a lot. Patent CN 1528510A discloses a kind of granular activated carbon for wooden vehicles and its preparation method. The method does not add binder, and the mesoporosity can reach more than 60%. The strength of charcoal reaches 85%. Patent CN103058186A discloses a method for preparing granular activated carbon from sawdust. Also without adding a binder, the resulting granular carbon has high strength and specific surface area, but the mesoporosity is not high. , and in the field of catalysis, there is a higher requirement for the strength of shaped activated carbon. At the same time, a higher microporosity is not suitable as a catalyst carrier, and a higher mesoporosity can further promote the progress of catalysis. Therefore, the invention of a Shaped activated carbon with high strength and high mesoporosity is particularly important

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