Method for preparing biomass fuel by catalyzing rice straw

Abstract

The invention discloses a method for preparing biomass fuel by catalyzing rice straw. The method comprises the following steps that the rice straw serves as a main raw material, primary pretreatment is carried out on the rice straw so as to obtain straw powder, then secondary pretreatment is carried out on the straw powder so as to obtain a straw suspension II. According to the method, the structure of cellulose is changed through the pre-treatment process, the size of particles of the cellulose is decreased, the probability of effective chemical reaction collision between cellulose moleculesand a solvent is improved, and the yield of a final target product is increased; and a catalyst carrier is used for adsorbing a catalyst, then the carrier is taken as a unit, a target substrate is catalyzed, and therefore a good effect is achieved.

Description

technical field [0001] The invention relates to the technical field of development and utilization of new energy, in particular to a method for catalytically preparing biomass fuel from rice straw. Background technique [0002] Methyl levulinate is a light yellow, transparent oily compound, a high-efficiency diesel additive, and can also be used alone as a clean fuel. The product quality meets the requirements of the EN590 standard, and the emission meets the requirements of the ULSD standard. This product can reduce greenhouse gas emissions by 96%, and is allowed to be blended with petroleum diesel at a ratio of 65% in Europe. Compared with grease biodiesel, the cost is reduced by 50%, but the sales price is more than 30%. And it has the characteristics of biodegradability, low condensation, good oxidation stability, etc., and it is the development direction of high-grade diesel fuel. However, due to the refractory structure of biomass, most of the current direct alcoholy...

AI Technical Summary

Problems solved by technology

Moreover, the color of the catalyst after the reaction changes from white to off-white, which may be caused by carbon on the surface of the catalyst; the occurrence of agglomeration affects the reuse of Al 2 (SO 4 ) 3 18H 2 O catalyst activity, compared to fresh Al 2 (SO 4 ) 3 18H 2 O solid catalyst, reused Al 2 (SO 4 ) 3 18H 2 O activity decreased

[0004] According to the above-mentioned problems, the present invention mainly solves the problem that the production of methyl levulinate from biomass cannot be produced on a large scale due to the difficult alcoholysis of straw and the low efficiency of catalyst reuse.