Coprinus comatus mushroom dreg porous carbon adsorbent as well as preparation method and application thereof

Abstract

The invention relates to a coprinus comatus mushroom dreg porous carbon adsorbent as well as a preparation method and application thereof. The preparation method comprises the steps of mixing coprinus comatus mushroom dregs with an activating agent to form mixed slurry for hydrothermal reaction; and drying and pyrolyzing the solid obtained by the hydrothermal reaction to obtain the coprinus comatus mushroom dreg porous carbon adsorbent. According to the method, an ammonium phosphate activation process is explored, and meanwhile, the promotion effect of hydrothermal coupling low-temperature pyrolysis is compared; the yield of the ammonium phosphate hydrothermal combined low-temperature pyrolytic carbon can reach 64.84%, and the adsorption capacities of the ammonium phosphate hydrothermal combined low-temperature pyrolytic carbon on benzene and dichloroethane are as high as 85.7 mg / g-biomasses and 128.8 mg / g-biomasses; compared with different pyrolysis temperatures, it is found that low-temperature pyrolysis activation is easier to maintain a complete carbon skeleton and retain heteroatoms; and hydrothermal carbonization has an immobilization effect on the carbon skeleton, N / P heteroatoms can be effectively retained, the carbon skeleton can be effectively protected in the pyrolysis activation process through the cross-linking effect of ammonium phosphate, and finally the high carbon yield is obtained.

Description

technical field

[0001] The invention belongs to the technical field of utilization of biomass solid waste resources and air pollution control, and in particular relates to a porous carbon adsorbent for Coprinus comatus mushroom residue, a preparation method and application thereof. Background technique

[0002] With the acceleration of urbanization and industrialization and the rapid development of the national economy, the emission of volatile organic compounds VOCs (Volatile Organic Compounds) has increased sharply. VOCs emissions come from a wide range of sources, mainly including industrial sources, agricultural sources, traffic sources and natural sources. Among them, VOCs emissions from industrial sources are the main emission source, accounting for more than 50% of the total emission source, and the emission is expected to reach 24.46 million tons in 2020. The emission of VOCs from industrial flue gas has various types, complex components, strong toxicity, and is eas...

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