Method for preparing activated carbon with high specific surface area by waste PET mineral water bottles

Abstract

The invention discloses a method for preparing activated carbon with high specific surface area by waste PET mineral water bottles, which takes the waste PET mineral water bottles as a raw material and adopts a method of first performing alkaline hydrolysis on the raw material and then activating the obtained product to prepare the activated carbon with high specific surface area. The method comprises the following steps of: 1) crushing PET mineral water bottles into pieces, mixing the pieces with an activating agent, namely potassium hydroxide, then adding distilled water into the mixture, and stirring the mixture at a high temperature and fully reacting; 2) placing the mixture into a muffle furnace for drying; 3) performing activation treatment on a dried substance in nitrogen atmosphere at the high temperature; and 4) cooling the obtained product in the nitrogen atmosphere, acid cleaning the obtained product, washing the obtained product to be neutral, and drying the obtained product in a baking oven to obtain the activated carbon with high specific surface area. The method has the advantages that: 1) the method has a simple and convenient process, less consumption of the activating agent, and high yield; 2) the prepared activated carbon has high specific surface area, narrow pore distribution, and good absorption performance; and 3) the raw material and the activating agent are uniformly mixed and perform a hydrolysis reaction synchronously, thus the activating agent can be fully utilized, which can reduce the consumption of the activating agent and reduce production cost.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry and environmental protection, and in particular relates to a method for preparing activated carbon with high specific surface area by utilizing waste PET mineral water bottles. Background technique [0002] With the rapid development of industry and processing and manufacturing, the proportion of synthetic polymer products in people's production and life is also increasing. At the same time, however, post-consumer polymer products, such as plastics, mostly appear as solid waste in industrial and domestic waste. Artificial polymer waste is almost not biodegradable, and long-term accumulation will cause serious pollution to the environment, and even block the food chain, breaking the ecological balance and affecting the healthy development of the ecosystem. Therefore, how to scientifically and effectively dispose of artificial polymer waste has become one of the major issues of great con...

AI Technical Summary

Problems solved by technology

This method cannot fully create pores and the amount of activator is relatively large (generally 6 to 10 times that of the raw material), and the cost is high