Carbon-based solid acid catalyst and preparation method thereof

Abstract

The invention relates to preparation of a catalyst, in particular to a carbon-based solid acid catalyst and a preparation method thereof. The carbon-based solid acid catalyst has a pore size distribution of 3-50nm, a BET (Brunauer, Emmett and Teller) specific surface of 40-80m<2> / g and an acid value of 0.82-1.52mmol / g. The carbon-based solid acid catalyst is used for thermally decomposing granular carbon-based sulfonic acid under the temperature at 300 DEG C. The preparation method for preparing the carbon-based solid acid catalyst according to claim 1 is characterized by comprising the following steps of: preparing a modified coal precursor; preparing a compounding raw material; and carbonizing and sulfonating to obtain the solid acid catalyst. The carbon-based solid acid catalyst provided by the invention has the advantages that the preparation process is simple; the adopted raw materials are low in cost and easily obtained; based on a lyophobic amorphous carbon structure which is obtained by calcining an ultralow ash Taixi coal compound, a sulfo group is connected, and thus the carbon-based solid acid catalyst has porosity characteristic, developed mesopores, increased specific surface area and excellent heat stability; and the catalytic activity of the carbon-based solid acid catalyst is higher than that of the traditional acid catalyst, and the carbon-based solid acid catalyst is reusable and easy to be recovered.

Description

Technical field

[0001] The invention relates to the preparation of a catalyst, in particular to a carbon-based solid acid catalyst and a preparation method thereof. Background technique

[0002] In recent years, the preparation and application of solid carbon sulfonic acid catalysts have attracted the attention of academic circles. People have developed a variety of solid carbons obtained from polycyclic aromatic hydrocarbons, sugars (such as glucose, etc.), natural substances (such as wood, walnuts, millet, and lignin, etc.) through partial carbonization and then sulfuric acid sulfonation. Sulfonic acid, and has a good catalytic effect in some fine organic synthesis and biomass conversion. However, the materials obtained by these methods are limited by the source of the carbon source matrix, or the source of raw materials is expensive, and belongs to the powdery soft material. The surface has a dense structure, the pore size is not developed and is difficult to control, the aci...

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