Method for preparing hydrogen-rich gas through gas-solid synchronous gasification of pyrolysis gas and biomass charcoal of biomass

A technology of biomass charcoal and pyrolysis gas, which is applied in the direction of manufacturing combustible gas, treating combustible gas with catalysis, and gasification technology to achieve the effects of high carbon conversion rate, high utilization rate and high yield

Active Publication Date: 2016-07-13
EAST CHINA UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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  • Method for preparing hydrogen-rich gas through gas-solid synchronous gasification of pyrolysis gas and biomass charcoal of biomass
  • Method for preparing hydrogen-rich gas through gas-solid synchronous gasification of pyrolysis gas and biomass charcoal of biomass
  • Method for preparing hydrogen-rich gas through gas-solid synchronous gasification of pyrolysis gas and biomass charcoal of biomass

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Effect test

Embodiment 1-4

[0034] The raw biomass is put into the hopper 1, and sent into the fluidized bed reactor 3 through the screw feeder 2 (the mass flow rate is 200g / h) for rapid pyrolysis. In the bed reactor 3, S / B=3. The pyrolysis gas and biochar generated by the rapid pyrolysis of biomass enter the entrained bed reactor 4 with the air flow for synchronous gasification reaction of the cracked gas and biochar. The temperature of the entrained bed reactor 4 is 700-850°C (ΔT = 50°C, divided into four separate tests). The product from entrained bed reactor 4 enters cyclone separator 5 to remove ash and then enters fixed bed reactor 7 for catalytic reforming reaction, WHSV is 1, and catalytic reforming reaction temperature is 850°C.

[0035] The reaction results are shown in Table 2 below:

[0036] Table 2

[0037]

Embodiment 5-8

[0039] The raw biomass is put into the hopper 1, and sent into the fluidized bed reactor 3 through the screw feeder 2 (the mass flow rate is 200g / h) for rapid pyrolysis. In the bed reactor 3, S / B=1-4, four experiments were carried out separately. The pyrolysis gas and biochar generated by the rapid pyrolysis of biomass enter the entrained bed reactor 4 with the airflow for synchronous gasification reaction of the pyrolysis gas and biochar. The temperature of the entrained bed reactor 4 is 800°C. The product from the reactor 4 enters the cyclone separator 5 to obtain residual solids, and the condensable gases condense to obtain tar.

[0040] The reaction results are shown in Table 3 below:

[0041] table 3

[0042]

[0043]

Embodiment 9-12

[0045] The raw biomass is put into the hopper 1, and sent into the fluidized bed reactor 3 through the screw feeder 2 (the mass flow rate is 200g / h) for rapid pyrolysis. In the bed reactor 3, S / B=3. The pyrolysis gas and biochar generated by the rapid pyrolysis of biomass enter the entrained bed reactor 4 with the air flow for synchronous gasification of the pyrolysis gas and biochar. The temperature of the entrained bed reactor 4 is 850°C. The product from entrained bed reactor 4 enters cyclone separator 5 to remove ash and then enters fixed bed reactor 7 for catalytic reforming reaction, WHSV is 1, catalytic reforming reaction temperature is 700-850°C, and is carried out separately Four experiments were performed, each with a temperature difference of 50 degrees.

[0046] The reaction results are shown in Table 4 below:

[0047] Table 4

[0048]

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Abstract

The invention relates to the field of biomass energy, in particular to a method for preparing hydrogen-rich gas through gas-solid synchronous gasification of pyrolysis gas and biomass charcoal of biomass. The method comprises steps as follows: the pyrolysis gas and the biomass charcoal, which are produced through quick pyrolysis of the biomass, and steam enter an entrained-flow reactor for gas-solid synchronous gasification of the pyrolysis gas and the biomass charcoal; a product coming out of the entrained-flow reactor enters a fixed bed reactor for a catalytic reforming reaction for production of the hydrogen-rich gas after removal of solid particles. According to the method, the utilization rate of the biomass charcoal is high; the yield of the hydrogen-rich gas is high; compared with existing methods for producing hydrogen through gasification of the biomass, the energy consumption is low, and the problem of tar during gasification is solved; compared with existing methods for producing hydrogen through reformation of bio-oil, the energy consumption is low, and the charcoal conversion rate is high; the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of biomass energy, in particular to a method for producing hydrogen-rich gas by gas-solid synchronous gasification of biomass cracking gas and biomass charcoal. Background technique [0002] Hydrogen is a high-quality fuel with high calorific value. The calorific value per kilogram of hydrogen is 143MJ. It has good combustion performance and has a wide flammable range when mixed with air, and it burns quickly. Hydrogen is used as a fuel, and its most prominent advantage is that it reacts with oxygen to produce water, so it is the cleanest fuel. Although the technology for producing hydrogen from conventional energy sources is mature, it can neither solve the problem of depletion of fossil fuel resources nor fundamentally reduce carbon dioxide emissions. Therefore, biomass hydrogen production has become a renewable and clean energy technology that countries are rushing to develop. [0003] At present, domestic and fo...

Claims

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Application Information

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IPC IPC(8): C10J3/48C10J3/66C10K3/04
CPCY02P20/52C10J3/485C10J3/66C10J2300/0916C10J2300/0976C10J2300/1656C10K3/04
Inventor 张素平丁鼎陈振琦谢登印蔡勤杰
Owner EAST CHINA UNIV OF SCI & TECH
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