Method for preparing jatropha curcas shell-based activated carbon

Abstract

The invention relates to a method for preparing jatropha curcas shell-based activated carbon, which uses vapor or a carbon dioxide gas as an activator to activate waste jatropha curcas shells to obtain high-quality activated carbon. The method adopts high-temperature carbonization in the carbonization process, adopts different rates of temperature rise for raising the temperature sectionally in the activating process, and has the advantages of short activating time, low energy consumption, high product yield, cleanness, environment protection and the like. The point adsorption capacity of the product namely the activated carbon reaches the national primary standard. The method has a rich material source, can make full use of the waste jatropha curcas shell resource, decreases the stack of the waste jatropha curcas shells, solves the problem of environmental pollution caused by combustion and opens up a new path for the comprehensive use of jatropha curcas.

Description

1. Technical field [0001] The invention relates to a method for preparing jatropha shell-based activated carbon, which belongs to the technical field of material preparation. 2. Background technology [0002] Jatropha jatropha, also known as bright tung tree and stink tung tree, is one of the important native tree species in dry-hot valleys. At present, Jatropha jatropha is used in agriculture, medicine, environmental protection and ecological construction. In recent years, with the increasing energy consumption, the ensuing environmental problems have become increasingly serious, and people are paying more and more attention to the utilization of bio-energy. Jatropha seeds can be used as raw materials for diesel production, and limited fossil Compared with energy resources, using energy plants such as jatropha to obtain biodiesel is one of the ways to solve the energy crisis and has the advantage of being renewable. However, the processing of jatropha has resulted in the p...

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Problems solved by technology

[0003] At present, there are few domestic studies on the preparation of active carbon from Jatropha husks as raw materials. The Chinese patent application with the publication number CN-101112984A discloses "the method for preparing activated carbon by using waste Jatropha husks", although physical and chemical activation methods are used to prepare Jatropha jatropha respectively. Shell activated carbon, but on the one hand, although the product made by chemical method has better performance, it introduces chemical agent in the preparation process, which has certain dangers to the environment; on the other hand, although the physical activation method avoids the damage of chemical agent Introduced, but its activation time reaches 1-3 hours, and the performance of the obtained product is not ideal

Patent 200510010671.7 announced "A method for making mechanism charcoal from agricultural and forestry waste". This method obtains mechanism charcoal through three-stage low-temperature carbonization, but the preparation time of this method is long. Although the preparation is carried out at low temperature, the consumption of energy still bigger

Patent 200510010669.X published "A Method of Physically Treating Tobacco Stem Waste to Make Activated Carbon". This method uses microwave heating to activate water vapor to prepare tobacco stem-based activated carbon. Although the activation time is shortened by microwave heating, the preparation process The flow rate of water vapor is high, which has certain requirements on the quality and corrosion resistance of the equipment. At the same time, more energy is needed to obtain high-flow water vapor, which is not conducive to the simplification and popularization of the process.