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Preparation method of catalyst for lightening of biomass tar heavy component

A technology for heavy components and catalysts, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, naphtha catalytic reforming, etc., to achieve low production costs, improve utilization efficiency, and realize Lightweight effect

Active Publication Date: 2015-02-11
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of a catalyst for the lightening of heavy components of biomass tar, which uses waste carbon-based desulfurizers to prepare a lightening catalyst, and preferably reforms the heavy components of biotar into light Components to solve saturated adsorption of H in gas 2 The reuse of carbon-based desulfurization adsorbent after S and the problem of effective catalytic reforming and lightening of heavy components of biomass tar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 50g of dried and sieved coal sample and 100ml of 12wt% nitrate solution (the molar ratio of Fe and Mn metal elements is 7:3) in a stainless steel reaction kettle at 213°C, keep it at a constant temperature for 5h, and then suction filter , washed, dried in a vacuum oven at 80°C to constant weight, and then in N 2 Under the atmosphere, the heating rate was raised to 500 °C at a rate of 10 °C / min, and the constant temperature was pyrolyzed for 4 hours to obtain 26 g of carbon-based desulfurization adsorbent. The carrier was semi-coke, and the active components were 11.0 wt % iron oxide and 5.0 wt % A mixture of manganese oxides. Use this adsorbent to adsorb H in the gas at 400°C 2 After S, the spent carbon-based desulfurizer is obtained.

[0022] The gained spent charcoal-based desulfurizer was mixed in 40ml of 10wt% Mg(HCO 3 ) 2 Immerse in the solution for 4h, then suction filter, and dry in a vacuum oven at 50°C for 6h; at 750°C and N 2 Roasting under the atmos...

Embodiment 2

[0025] Put 50g of dried and sieved coal sample and 100ml of 15wt% nitrate solution containing iron, manganese and cerium metal active components (the molar ratio of Fe, Mn and Ce metal elements is 6:4:1) In a stainless steel reaction kettle at 213°C, place it at a constant temperature for 5 hours, then filter it with suction, wash it, dry it in a vacuum oven at 80°C to constant weight, and then place it under N 2 Under the atmosphere, the heating rate was raised to 500°C at a rate of 10°C / min, and the constant temperature was pyrolyzed for 4 hours to obtain 27g of carbon-based desulfurization adsorbent. The carrier was semi-coke, and the active components were mixed oxides of Fe, Mn, and Ce. Adsorb H in the gas with this adsorbent 2 After S, the spent carbon-based desulfurizer is obtained.

[0026] The gained spent charcoal-based desulfurizer was mixed in 40ml of 10wt% Mg(HCO 3 ) 2 Immerse in the solution for 4h, then suction filter, and dry in a vacuum oven at 50°C for 6h;...

Embodiment 3

[0029] Weigh 5g of the lightweight catalyst prepared in Example 2, put it into a fixed-bed reactor at normal pressure, the reactor temperature is 500°C, nitrogen is used as the carrier gas, hydrogen and water vapor are used as the reforming reaction gas, and the total gas flow rate is 300ml / min, where the volume concentration of hydrogen is 7%, and the volume concentration of water vapor is 16%. Biomass tar is injected into the reactor through an air-cooled probe at a sample amount of 150 mg / min by a syringe pump, and fully contacted with the light weight catalyst. The relative content of light components in the biomass tar after catalytic reforming Increased from 40% to 95%.

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Abstract

The invention provides a preparation method of a catalyst for lightening of a biomass tar heavy component. The preparation method comprises the following steps: dipping a waste carbon-based desulfurizing agent, which contains bimetal active ingredients of Fe and Mn or Ce or tri-metal active ingredients of Fe, Mn and Ce and is excellent in desulfurizing performance but difficult to completely regenerate, in a magnesium bicarbonate solution, introducing MgO, drying and roasting to prepare a lightening catalyst for catalyzing a biomass tar reforming reaction. Under the action of a mixed atmosphere of hydrogen and water vapor and the catalyst, a biomass tar heavy component can be well reformed to obtain a light component. A deactivated catalyst obtained after the catalyzed reforming reaction is not required to be regenerated, and can be directly used as a raw material for combustion or gasification.

Description

technical field [0001] The invention belongs to the technical field of biomass resource conversion and waste recycling, and relates to the conversion of heavy components in biomass tar and the recycling technology of carbon-based desulfurization adsorbents, in particular to a waste carbon-based The hydrogen sulfide removal adsorbent is used to catalyze the technology of biomass tar lightening. Background technique [0002] Fossil energy reserves are decreasing day by day. Biomass, which has the characteristics of abundance, cheapness and cleanliness, has been widely developed and utilized as a renewable energy source, forming a new energy research field. Biomass refers to renewable and recyclable biological organic matter, including all plants, microorganisms, animals that feed on plants and microorganisms, and their wastes. At present, biomass energy has become the fourth largest energy after coal, oil and natural gas, and it is also the most important renewable energy. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C10G35/06
Inventor 王美君常丽萍任秀蓉芦晓芳王建成鲍卫仁
Owner TAIYUAN UNIV OF TECH
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