Preparation method and application of grain stillage-loaded heterogeneous catalyst

Abstract

The invention mainly aims at providing a preparation method and application of a grain stillage-loaded heterogeneous catalyst. The method comprises the following steps of (1) putting 10-50g of dry grain stillage into 300-1000mL of 1-10% acid solution for soaking for 1-8h, filtering and washing until neutral, drying and burning the dried grain stillage at 400-650 DEG C to obtain silicon dioxide; and (2) soaking the silicon dioxide into 10-50% Fe<3+> ion solution, stirring in a water bath at 60-95 DEG C for 1-4h, carrying out solid-liquid separation to obtain a solid and drying the solid to obtain the grain stillage-loaded heterogeneous catalyst. The Fe<3+> ion solution is taken as an iron source, the grain stillage is effectively utilized as a base material and the heterogeneous catalyst is loaded, so that the prepared catalyst is high in catalysis efficiency, no secondary pollution is generated and the catalyst can be repeatedly used for multiple times.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a preparation method and application of distiller's grains loaded heterogeneous catalyst. Background technique [0002] my country is a big country in the production and consumption of liquor, and a huge amount of distiller's grains, a by-product of brewing raw materials, are produced during the production of liquor. Because distiller's grains contain a large amount of organic matter, such as starch, cellulose, and organic acids, discarding distiller's grains as waste not only wastes resources, but also causes serious environmental pollution pressure. At present, the main utilization methods of domestic distiller's grains include: for the reproduction of raw wine, for the production of glycerin, for the cultivation of edible fungi, for the recovery of methane through fermentation, for the production of feed protein, and so on. However, in these treatment methods, except for t...

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Problems solved by technology

However, in these treatment methods, except for being used as feed and agricultural fertilizer, most of the other methods are difficult to fundamentally solve the problem of the final destination of distiller's grains, and may produce more distiller's grains

In addition, distiller's grains have complex components, high water content, difficult to store and difficult to utilize fermentation by-products such as rice husks, so there are still certain difficulties in the utilization of distiller's grains

[0003] The traditional Fenton reaction is a homogeneous catalytic reaction, and the reaction is generally carried out in an environment with a pH of 3-5, which easily leads to Fe 3+ The loss of Fe in waste liquid 3+ The content is high, which inevitably contains a certain amount of other pollutants, which is difficult to further process and dispose of, resulting in secondary pollution

After an oxidation reaction, it is discarded in the form of filter cake and cannot be recycled, which not only wastes resources, but also increases the cost of wastewater treatment

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