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Method for preparing biogasoline by catalytic hydrogenolysis on straws

A technology of biogasoline and catalytic hydrogenolysis, which is applied in the field of energy utilization of agricultural waste, can solve the problems of low yield and high requirements for production equipment, and achieve the effects of low oxygen content, avoiding material loss, and simple operation process

Inactive Publication Date: 2019-01-08
NANCHANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low yield and high requirements for production equipment in the process of converting the existing agricultural waste straw into biofuel, the present invention provides a method for producing biogasoline by catalytic hydrogenolysis of straw, which can be used at low temperature and low pressure And under mild conditions containing hydrogen atmosphere, the metal catalyst is used to catalyze the hydrogenation of straw, and the cellulose and hemicellulose in the straw are directly converted into compounds such as furan, furfural, and cyclic ketones in one pot with high yield. At the same time, the present invention The resulting product has low oxygen content and can be directly used as biogasoline

Method used

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  • Method for preparing biogasoline by catalytic hydrogenolysis on straws

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1 rice straw wax lipid removal and lignin treatment

[0028] (1) Rice straw pretreatment: Cut the rice straw into small pieces of about 15 cm, wash it with deionized water, and dry it in a ventilated place for 3 days; crush and sieve the air-dried rice straw product; The 40 mesh sieve but the stalks that cannot pass through the 60 mesh sieve are placed in airtight plastic bags and stored at -20°C.

[0029] (2) Rice straw degreasing wax: Take 4g of dried rice straw wrapped with gauze silk and put it into a Soxhlet extractor, extract with 150ml ethanol solution at 105°C for 3 hours, control the reflux at 4-6 times per hour, Then take out the rice straw and dry it.

[0030] (3) Removal of lignin from rice straw: Weigh 3g of fat-removed waxy rice straw into a round bottom flask, then add 100ml of water, 0.75ml of acetic acid, and 0.6g of sodium chlorite in sequence, and heat in an oil bath at 75°C for 3h , add 0.75ml acetic acid and 0.6g sodium chlorite per hou...

Embodiment 2

[0031] Embodiment 2 each biofuel preparation example

preparation example 1

[0033] In a 50mL high-temperature and high-pressure reactor, add 0.1g of lignin-removed and fat-waxy rice straw, 0.1mmol RhCl 3 , 2mmol sodium iodide, 2.875ml water, 0.125ml HCl (37wt%), 3ml toluene, seal the reactor, fill with hydrogen until the pressure in the reactor is 300psi, stir and rapidly heat to the temperature of the mixture in the reactor is 140°C , keep the temperature for 4h, after that, cool the reactor to room temperature with an ice-water bath, and collect the organic phase.

[0034] After GC-MS quantitative analysis combined with LC and GC quantitative analysis of the components and their contents in the organic phase, after calculation, it was obtained that the yield of 2-methylfuran in the product was 21.6%, and the yield of 2-methyltetrahydrofuran was 21.6%. The yield is 55.6%, the yield of 2,5-dimethyltetrahydrofuran is 6.4%, the yield of 2,5-dimethylfuran is 15.5%, the yield of 2-hexanone is 5.4%, and the yield of 3-methylcyclo The productive rate of pe...

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Abstract

The invention provides a method for preparing biogasoline by catalytic hydrogenolysis on straws. The method comprises the following steps: successively adding the straws, iodide, a metal catalyst, water, an organic solvent and inorganic acid in a reaction container according to a certain rate of charge, after feeding hydrogen until pressure in the reaction container reaches a certain range, heating the reaction container to a certain temperature and then reacting for a certain time, then cooling to a room temperature and collecting an organic phase. The prepared product mainly comprises 2-methyltetrahydrofuran, 2-methyl furan, 2,5-dimethyl tetrahydrofuran, 2,5-dimethylfuran, 2-hexanone, 3-methylcyclopentanone, 2,5-hexanedione and 5-methylfurfural. By the method, the straws are catalytically hydrogenated by metal under the conditions of low temperature and low pressure, and cellulose and hemicellulose portions in the straws are directly converted into furan, furfural and a cyclic ketones compound at high yield.

Description

technical field [0001] The invention belongs to the field of energy utilization of agricultural waste, and in particular relates to a method for preparing biogasoline by catalytic hydrogenolysis of straw. Background technique [0002] With the depletion of petroleum resources and the aggravation of environmental problems caused by petrochemical industry, people are paying more and more attention to new ways to replace traditional fossil resources. As a renewable resource, biomass can be used to prepare fuels and chemicals, and has great potential in replacing traditional fossil resources. [0003] Abandoned crop straw is a very valuable biological resource. At present, the comprehensive utilization rate of straw in my country is low, and most of the straw is landfilled or burned on the spot, which not only causes environmental pollution, but also a huge waste of resources. Although there are many traditional straw utilization methods such as fertilizer, feed, and base mate...

Claims

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Application Information

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IPC IPC(8): C10G1/08
CPCC10G1/083C10G2300/1003C10G2400/02
Inventor 杨维冉彭阳
Owner NANCHANG UNIV
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