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Method for controlling nitrogen emission in process of preparing liquid oil from algae

Inactive Publication Date: 2018-05-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention solves the problem of nitrogen discharge in the algae utilization process

Method used

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  • Method for controlling nitrogen emission in process of preparing liquid oil from algae
  • Method for controlling nitrogen emission in process of preparing liquid oil from algae
  • Method for controlling nitrogen emission in process of preparing liquid oil from algae

Examples

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Embodiment 1

[0026] The embodiment of the present invention describes a method for controlling nitrogen discharge in the process of preparing liquid oil from algae. The method specifically includes the following steps:

[0027] S1: After crushing spirulina and bamboo to particles smaller than 120 mesh, put them in an oven at 105°C for 24 hours to obtain pyrolysis raw materials;

[0028] S2: Use a fixed-bed reactor with a diameter of 45mm and a length of 60mm for pyrolysis. After heating the reactor to a specified temperature of 600°C, quickly send 2g of bamboo into the middle of the reactor for a reaction time of 30min, so that the biomass is fully Decompose, feed 200mL / min Ar as an inert carrier gas to obtain biomass carbon additives;

[0029] S3: Mix spirulina and bamboo at a mass ratio of 1:1 to form a mixture, put it in an oven at 105°C for 24 hours, then carry out a mixed pyrolysis reaction at 600°C for 30 minutes, and pyrolyze the volatile matter at the same time The nitrogen-contai...

Embodiment 2

[0033] The steps of this example are the same as those of Example 1, except that the algae biomass is Nannochloropsis.

Embodiment 3

[0035] The steps of this embodiment are the same as in Example 1, except that the algae biomass is Enteromorpha.

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Abstract

The invention belongs to the field of biomass utilization and discloses a method for controlling nitrogen emission in a process of preparing liquid oil from algae. The method comprises the following steps: S1: grinding and drying algae biomass and lignocellulose biomass; S2: putting the lignocellulose biomass in the step S1 into a fixed bed reactor and carrying out a pyrolytic reaction to obtain abiomass carbon additive; S3: mixing the algae biomass and the lignocellulose biomass in the step S1, and pyrolyzing the mixture to obtain a pyrolytic carbon solid and pyrolytic volatile components; S3: enabling a part of the nitrogen-containing substances in the pyrolytic volatile components to fully react with the biomass carbon additive obtained in the step S2, so as to fix a part of the nitrogen in the biomass carbon additive and achieve an aim of reducing nitrogen emission. According to the method provided by the invention, the nitrogen emission is effectively reduced, and the nitrogen can be converted into a nitrogen-doped carbon material with a high added value, thereby facilitating green utilization of the algae biomass.

Description

technical field [0001] The invention belongs to the field of biomass utilization, and more specifically relates to a method for controlling nitrogen discharge in the process of preparing liquid oil from algae. Background technique [0002] Algal biomass has become a promising renewable energy source due to its high carbon sequestration capacity, soilless planting, fast growth, and year-round harvesting, which can be used to prepare fuels, chemicals, and other high value-added product. Mixing and pyrolyzing it with lignocellulose can effectively improve the quality and quality of liquid oil products. However, since the algae biomass itself contains a relatively high nitrogen content (up to 10wt.%), some nitrogen-containing polluting gases (such as NO x Precursor: NH 3 and HCN), they may cause serious greenhouse effect, acid rain, and ozone hole, etc. Therefore, in order to realize the green utilization of algae biomass, it is necessary to find a method to control the nitr...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10B53/02B01D53/78B01D53/58B01D53/54
CPCB01D53/54B01D53/58B01D53/78B01D2251/304B01D2251/506B01D2251/604B01D2257/408C10B53/02C10G1/00Y02E50/10
Inventor 陈汉平陈伟陈应泉杨海平王贤华邵敬爱张雄曾阔张世红
Owner HUAZHONG UNIV OF SCI & TECH
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