Method for preparing high-specific-surface-area activated carbon from tobacco stalks

Abstract

The invention discloses a method for preparing high-specific-surface-area activated carbon from tobacco stalks, which comprises the following steps: pulverizing tobacco stalks into granules, mixing the granules and an activating agent according to a mass ratio of (1:8)-(2:1), adding the obtained mixture into water, evenly stirring, and impregnating for 10-14 hours; after impregnation is finished, filtering, drying the filter residue, placing into an electric furnace having a nitrogen protective atmosphere, and carbonizing at 450-750 DEG C for 1-2 hours; and after carbonization is finished, cooling in a nitrogen atmosphere, washing the obtained furnace slag, and drying. According to the method, high-quality activated carbon can be simply and quickly prepared from wastes in the tobacco industry. Thus, the method changes wastes into valuable substances, fully utilizes resources, avoids environmental pollution, has good economic benefits and is beneficial to industrial production.

Description

technical field [0001] The invention relates to a method for preparing activated carbon with a high specific surface area from tobacco stems, belonging to the field of new biomass energy utilization. Background technique [0002] Biomass energy ranks fourth in the world's total energy consumption and is becoming one of the main energy sources in the 21st century. Biomass as energy mainly refers to agricultural, forestry and other wastes, such as various crop straws, sugar crops, starch Primary processing of crops and oil crops, forestry and wood processing waste, municipal and industrial organic waste, and animal manure, etc. for fuel (e.g. pellets) or energy from secondary processing (e.g. biogas, microalgae oil) . [0003] Tobacco is one of the important economic crops in our country at present. Tobacco stems are the thick and hard veins of tobacco leaves, accounting for about 25% to 30% of leaf weight, and are by-products of the tobacco industry. After harvesting tobacc...

AI Technical Summary

Problems solved by technology

After harvesting tobacco leaves every year and completing the task of purchasing tobacco leaves, a large number of tobacco stems are either discarded in the fields, or dried and burned to form agricultural solid waste, which not only destroys the ecological environment, but also wastes resources.

The main components of tobacco stems are cellulose, lignin, total sugar, pectin, etc. These are substances containing a large amount of C, H, O, S, N and other elements, so CO, CO 2 , SO 2 , NO 2 The discharge of pollutants such as tobacco and other pollutants seriously threatens the quality of the atmospheric environment, so tobacco stem waste is not suitable for direct combustion, nor is it suitable for returning to the field as fertilizer like straw

Since every tobacco factory or tobacco rebaking factory in my country has a large number of tobacco stems stacked, it not only takes up a lot of storage space, but also causes idle resources