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Method for preparing butanol by rice straws

A technology of rice straw and butanol, which is applied in the field of butanol preparation, can solve the problems of low yield of butanol and incomplete fermentable sugar, and achieve the effect of low cost, less investment and simple preparation process

Inactive Publication Date: 2016-11-16
广西南宁荣威德新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for preparing butanol by using rice straw to solve the problem of low yield of butanol due to incomplete degradation of rice straw into fermentable sugar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method of utilizing rice straw to prepare butanol, comprising the following steps:

[0039] S1: Rinse the rice straw with salt water with a concentration of 12% for 2.5 hours, and after rinsing, dry the rice straw at a temperature of 98-104°C until the water content is less than or equal to 8% to obtain dry rice straw;

[0040] S2: pulverize the dry rice straw obtained in step S1, pass through a 150-mesh sieve, and obtain rice straw particles;

[0041] S3: put the rice straw particles obtained in step S2 into a microwave reactor, add solution A and mix evenly, heat to 62°C, pretreat for 1.1h at a stirring speed of 300r / min, then cool to room temperature and filter to prepare to obtain pretreated rice straw particles; the solution A is a mixed solution of acetone, ethanol and ammonium carboxylate, the mass concentration of the acetone is 9%, the mass concentration of the ethanol is 70%, and the ammonium carboxylate is The mass concentration of the salt is 7%, the volu...

Embodiment 2

[0045] A method of utilizing rice straw to prepare butanol, comprising the following steps:

[0046] S1: Rinse the rice straws with salt water with a concentration of 10% for 3 hours, and after rinsing, dry the rice straws at a temperature of 98-104°C until the water content is ≤8% to obtain dry rice straws;

[0047] S2: pulverize the dry rice straw obtained in step S1, pass through a 120-mesh sieve, and obtain rice straw particles;

[0048] S3: put the rice straw granules obtained in step S2 into a microwave reactor, add solution A and mix evenly, heat to 60°C, pretreat for 1.3h at a stirring speed of 200r / min, then cool to room temperature and filter to prepare to obtain pretreated rice straw particles; the solution A is a mixed solution of acetone, ethanol and ammonium carboxylate, the mass concentration of the acetone is 8%, the mass concentration of the ethanol is 60%, and the ammonium carboxylate is The mass concentration of the salt is 6%, the volume ratio of the aceto...

Embodiment 3

[0052] A method of utilizing rice straw to prepare butanol, comprising the following steps:

[0053] S1: Rinse the rice straws with salt water with a concentration of 15% for 2 hours, and after rinsing, dry the rice straws at a temperature of 98-104°C until the water content is ≤8% to obtain dry rice straws;

[0054] S2: pulverize the dry rice straw obtained in step S1, pass through a 200-mesh sieve, and obtain rice straw particles;

[0055] S3: put the rice straw particles obtained in step S2 into a microwave reactor, add solution A and mix evenly, heat to 64°C, pre-treat for 0.9h at a stirring speed of 300r / min, then cool to room temperature and filter to prepare Pretreated rice straw particles are obtained; the solution A is a mixed solution of acetone, ethanol and ammonium carboxylate, the mass concentration of the acetone is 10%, the mass concentration of the ethanol is 80%, and the ammonium carboxylate is The mass concentration of the salt is 8%, the volume ratio of the...

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Abstract

The invention discloses a method for preparing butanol by rice straws, and belongs to the technical field of biomass energy. The rice straws are dried, crushed, pretreated, hydrolyzed and fermented to obtain the butanol. Raw material sources are extensive, and butanol preparation cost is low. The method is simple in preparation process, less in investment and suitable for large-scale popularization and application. The bio-fuel butanol prepared by the method has a remarkable environment-friendly effect as compared with a fuel prepared by a petroleum refining method, and emission of greenhouse gas can be effectively reduced. Besides, a novel scheme is provided for solving the problem of energy shortage.

Description

【Technical field】 [0001] The invention belongs to the technical field of biomass energy, and in particular relates to a method for preparing butanol by utilizing rice straw. 【Background technique】 [0002] In the past two decades in China, due to the popularization of coal, electricity and natural gas and the abundance of various industrial products, the demand for rice straw in rural areas has decreased, and the disposal of a large amount of rice straw has become a serious social problem. Burning rice straws causes air pollution, fires, and the inability of aircraft to take off and land normally. [0003] With population growth, food, energy and the environment are the most important challenges facing humanity. The production of renewable and clean energy from cellulose raw materials has received increasing attention, and the production of fuel butanol from crop waste is considered to be the most promising industry. Rice is widely planted in my country, and a large amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/16C12R1/145
CPCC12P7/16C12P2201/00C12P2203/00Y02E50/10
Inventor 覃央央
Owner 广西南宁荣威德新能源科技有限公司
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