Microwave heating can produce good effects in the preparation and modification of activated carbon (S2. Microwave modification, many backwater hole is opened, the distributed capacitance change obviously, promoting the improvement of the adsorption. The microwave power and irradiation time are key determinants of modified activated carbon adsorption performance. On the mechanism of microwave carbonization and activation, it is generally believed that
Plant waste is mostly made of plant fiber raw materials, in the plant body under the action of capillary, modified solution absorbed by material whole fully, between fiber is filled with the subtle space, make the dry material volume expansion after soaking wet, and reaction. Because of the water in the raw material, modified solution constitute a polar molecule, with a strong absorption of microwave dielectric properties,Therefore, polar molecules collide and rub violently with microwave frequency, generating a large amount of heat, which makes water and modified solution volatilize rapidly, and generate steam pressure, which explodes out from the inside of the raw material to the outside. This sharp action makes the fiber space of the raw material expand and produce sharp drying.In this way, the raw material has a more obvious pore structure and a larger internal specific surface area than before microwave irradiation. Compared with the traditional heating method, the mechanism of microwave in the preparation process of activated carbon is completely different.It shows its unique advantages: high efficiency, energy saving, uniformity, selectivity, low pollution, high thermal efficiency, low energy consumption, simple process and equipment and small footprint, conducive to automation, low carbon loss, and recovery of useful substances.
Many theoretical problems in this new field, especially the microwave heating mechanism, need to be further studied, and the mathematical model of the heating process needs to be establishedMain uses of activated carbon:https://www.granular-activated-carbon.com/
1. Used for liquid phase adsorption of activated carbon
· Tap water, industrial water, electroplating wastewater, pure water, beverage, food, medicine water purification and preparation of electronic ultra-pure water.coal based activated carbon factory
· Decolorization, purification and purification of sucrose, xylose, monosodium glutamate, medicine, citric acid, chemical products and food additives
· Decolorization, impurity and flavor removal of grease, oil products, gasoline and diesel oil, purification, deodorization and impurity removal of alcohol and beverages · Purification, refining, decolorization and filtration of products in fine chemical, pharmaceutical and pharmaceutical processes.
Environmental protection engineering wastewater, domestic wastewater purification, decolorization, deodorization, COD reduction
2. Used for gas phase adsorption of activated carbon
· Adsorption and recovery of benzene, toluene, xylene, acetone, oil and gas, CS2 and other organic solvents.
· Non-smoke filter, decoration odor removal, indoor air purification (removal of formaldehyde, benzene, etc.), industrial gas purification (such as CO2, N2, etc.)
Petrochemical industry production, natural gas purification, deodorization, deodorization, waste gas treatment