Method for preparing carbon material at low temperature and co-producing fertilizer

Abstract

The invention relates to a method for preparing a carbon material at low temperature and co-producing a fertilizer. Processes of carbon source pyrolysis and carbon material activation are integrated; through a green process route in a closed system, low-temperature preparation of carbon is achieved; the produced carbon material can be further activated, modified and the like. By the method, the defects of high energy consumption, low yield, high dust pollution, a complicated posttreatment process, and serious environment pollution and difficult treatment of a waste solution and the like in the current carbon producing process are overcome; through the control of the types and the addition amounts of a carbon source and an activator as well as the temperature and the residence time in a reaction kettle, continuous clean production of the carbon material is achieved; through adjustment of the pH or the components, the produced waste solution is used as the fertilizer, so that harmless treatment and high-value conversion of the waste are achieved. In the method, the carbon source is wide (including biomass carbon, tar carbon, bitumen carbon and the like); by the method, the reaction condition is mild, the yield is high, the waste emission is avoided, the energy is saved and the consumption is lowered; therefore, the method is an environmentally friendly, efficient and economical method for sustainably producing the carbon material and co-producing the fertilizer.

Description

technical field [0001] The invention discloses a sustainable technology method for green, clean, and low-temperature preparation of carbon materials for co-production of fertilizers, and relates to a low-temperature preparation process of carbon materials and high-value resource utilization of reaction by-products. Background technique [0002] Carbon materials have the advantages of a wide variety, light weight, adjustable pore structure and specific surface area, chemical stability, and good catalytic activity. They are used in fuels, sewage treatment, soil remediation, catalysis, energy storage and conversion, fertilizers, coatings, etc. Widespread, the demand has continued to increase in recent years. Biomass materials are renewable organic resources with a large reserve on the earth, but a large part of them exists in the form of biomass waste, such as agricultural and forestry product waste, which has become an important source of environmental pollution. The petroche...

AI Technical Summary

Problems solved by technology

Compared with the two methods, the energy consumption of physical activation is high, the activation rate is low, and the yield is low

In addition, a large amount of chemical reagents are used in the chemical activation process, which not only causes corrosion of equipment, but also complicates the subsequent treatment process. After activated carbon is activated, it needs to be neutralized and washed. In order to meet the requirements of environmental protection and emission, the energy consumption is high, which increases the preparation cost of activated carbon to varying degrees and hinders the application of activated carbon.

Although the current hydrothermal method can make the reaction proceed in a closed environment, there are problems such as uniform mixing of materials, high energy consumption and difficult treatment of carbon-rich waste liquid.

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