PRODUCTION OF COMPOSITE SORPTION-ACTIVE MATERIALS THE COMPOSITION «CARBON BLACK – CLAY MATERIAL» FROM MAN-MADE WASTE
Abstract
A technique for obtaining mineral-carbon composite sorption-active materials based on man-made waste has been developed. The pyrolysis product of used car tires is used as a filler, clay waste generated during excavation works is used as a binder. The production process consists of the stages of preparation of components, mixing, extrusion molding and heat treatment at elevated temperatures in an inert atmosphere. The influence of qualitative and quantitative composition of composite sorption-active materials on their porous structure, strength and sorption properties is shown. The additional introduction of bentonite clay into the composition of the material, characterized by high plasticity in an amount of 10-25%, leads to an increase in the crushing strength of the granule by more than 80%. In this case, materials with a developed mesoporous structure are mainly obtained, and the distribution of mesopores in size varies depending on the composition of the composite. The mesoporous structure being formed is characterized by a narrow distribution of small pores in the range of 1-4 nm, approaching supermicropores along the upper boundary. The possibility of obtaining an air dryer similar to the KG brand based on composite sorption-active materials by impregnation with a solution of calcium chloride is shown. An assessment of its drying capacity by water vapor has been carried out. Materials of this type are used to protect a low-temperature catalyst of the hopkalit brand from water vapor in a dynamic mode. It is shown that the desiccant based on a composite sorption-active material is not inferior in protective properties to the KG desiccant and ensures the effective performance of hopkalite under specified application conditions.
For citation:
Samonin V.V., Podvyaznikov M.L., Spiridonova E.A., Khrylova E.D., Khokhlache S.P., Garabadzhiu A.V. Production of composite sorption-active materials the composition «carbon black – clay material» from man-made waste. Ros. Khim. Zh. 2022. V. 66. N 3. P. 61-69. DOI: 10.6060/rcj.2022663.9.
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