Method for preparing bio-oil and/or pyrolytic gas by pyrolysis of biomass

A biomass pyrolysis and biomass technology, applied in the field of chemical industry, can solve problems such as harsh reaction conditions, high temperature and pressure, complex process, etc., and achieve the effect of low production cost, large profit margin, and simple equipment process

Active Publication Date: 2012-09-19
ENN SCI & TECH DEV
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  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the disadvantages of the prior art, such as high cost, harsh reaction conditions (higher temperature and pressure), complex process, etc., the present i

Method used

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  • Method for preparing bio-oil and/or pyrolytic gas by pyrolysis of biomass

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] 1. Weigh 20g of NaOH (analytical grade AR) and add it to 380g of tap water to obtain a 5% NaOH solution.

[0049] 2. After the dried corn cob (water content 5%-15%) is crushed by a pulverizer, it is passed through a 20-mesh sieve to obtain corn cob powder.

[0050] 3. Weigh 150g of the corncob powder obtained in step 2 and add it to 75g of the NaOH solution obtained in step 1, stir and mix well and let it stand for 3 hours, then put it in an oven at 80℃ for 12 hours to bake the dried corncob The powder is passed through a 20-mesh sieve to obtain a corncob powder containing catalyst.

[0051] 4. Weigh 31.8 g of corn cob powder obtained in step 3 and add 124.7 g of oil feet to the colloid mill and mix well to obtain a pyrolysis reactant with a corn cob content of 20% (hereinafter referred to as solid content). The reactant is added to the pyrolysis rectification tower, and pyrolyzed at normal pressure and 270° C. for 0.5 h to obtain pyrolysis liquid and pyroly...

Example Embodiment

[0056] Example 2

[0057] Steps 1-3 are the same as in Example 1. In Step 4, a material with a solid content of 30% is prepared. The other reaction conditions are the same as in Example 1. After the pyrolysis is completed, the liquid yield is 64.69% and the gas yield is 13.12%. , Repeated experiments on a solid content of 30%, the liquid yields obtained are all around 65%, and the repeatability is good.

[0058] The obtained bio-oil was tested, and the results are shown in Table 1.

[0059] Table 1 Bio-oil technical indicators

[0060] Analysis Project

[0061] 10% recovery temperature, ℃

[0062] The results show that the obtained bio-oil has a high calorific value of 41.59MJ / kg, which is higher than the calorific value of fuel oil (39.8MJ / kg). At the same time, the density, flash point, mechanical impurities and other indicators are similar to fuel oil and can be used to replace fuel oil. . It can also be further processed to obtain biodiesel or an emulsification process ca...

Example Embodiment

[0067] Example 3

[0068] Steps 1-3 are the same as in Example 1. In Step 4, a material with a solid content of 40% is prepared. The pyrolysis time is 0.3h. Other reaction conditions are the same as in Example 1. After the pyrolysis is completed, the liquid yield is 57.83%. , The gas yield is 18.20%.

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Abstract

The invention belongs to the field of chemical industry and particularly relates to a method for preparing bio-oil and/or pyrolytic gas by pyrolysis of biomass. The method comprises the following steps of: (1) fully immersing biomass in catalyst-containing solution, taking out and drying the biomass to obtain the dry basis biomass; and (2) uniformly mixing the dry basis biomass and a pyrolytic solvent, and performing pyrolytic distillation at the temperature of between 200 and 350 DEG C and under normal pressure for 0.3 to 1.5 hours to obtain the bio-oil and the pyrolytic gas. The invention also relates to application and a method of using oil residue in biomass conversion. The production technology of biomass fluid fuel, provided by the invention, has the advantages of simple process, manure technology, mild reaction conditions, low cost, easy industrialization and the like.

Description

Technical field [0001] The invention belongs to the field of chemical industry and relates to a method for preparing bio-oil and / or pyrolysis gas from biomass, in particular to a method for preparing bio-oil and / or pyrolysis gas from biomass pyrolysis. Background technique [0002] The energy crisis and the deterioration of the ecological environment are common problems facing mankind at present. Countries all over the world are looking for clean alternative energy sources to ease the pressure on energy and the environment. Biomass energy, as a renewable and clean new energy source, is an ideal fossil alternative fuel, and has attracted the attention of countries all over the world in recent years. [0003] Biomass energy is second only to coal, oil and natural gas and ranks fourth in the world's total energy consumption. It occupies an important position in the entire energy system. However, the utilization of biomass resources is far from reaching the level of large-scale comme...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10G1/02C10B53/02
CPCY02E50/14Y02E50/10
Inventor 刘波湛月平赵卫军段占庭朱蒙李金来甘中学
Owner ENN SCI & TECH DEV
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