Composite modified biomass activated carbon for degrading formaldehyde and preparation method of activated carbon

Abstract

The invention discloses composite modified biomass activated carbon for degrading formaldehyde and a preparation method of the activated carbon and belongs to the field of solid waste resource utilization. The composite modified biomass activated carbon comprises biomass waste, a composite modification agent, a composite grinding aid, phosphoric acid, absolute ethyl alcohol, hydrochloric acid andwater. The biomass waste comprises one or more of fruit shells, kernels and straw; the composite modification agent is a mixture of Bayer-process red mud and coal gangue. The Bayer-process red mud, the coal gangue and the biomass waste material are compounded for preparing the composite modified biomass activated carbon, a metal oxide in the mixture of the Bayer-process red mud and the coal gangueis used for modifying the biomass waste material, the service life of the activated carbon is prolonged, the mechanical strength of the activated carbon is improved, the production cost of the activated carbon is decreased by 50-60%, the high additional value application range of the Bayer-process red mud, the coal gangue and the biomass waste material is enlarged, and a new idea of using waste to treat dangers is achieved.

Description

technical field [0001] The invention belongs to the field of solid waste resource utilization, and specifically relates to a method of grinding biomass waste and a composite modifier, and using the composite modifier powder to modify the biomass waste powder to obtain composite modified biomass Activated carbon and its preparation method. Background technique [0002] About 80% of people's life is spent indoors, so the indoor environment is the place where people are most frequently in contact with, and the quality of the air quality will directly affect the health of the people who live there. At present, with people's requirements for building thermal insulation performance and interior decoration beautification, the concentration of volatile organic compounds in the indoor environment has increased, leading to increasingly serious problems with indoor air quality. The focus of quality. [0003] Activated carbon is a carbonaceous material with developed porous structure ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that wood and bamboo are commonly used to prepare activated carbon, which leads to high cost and is not conducive to the sustainable development of the ecological environment; the service life of activated carbon is short, which is easy to cause secondary pollution of the indoor environment; the use of metal oxides to modify activated carbon can be Improve the service life of activated carbon and the performance of formaldehyde degradation, but it will lead to increased production costs; activated carbon has low mechanical strength and is easy to pulverize, low ignition point; and coal gangue is hard to grind because of its high hardness

Images