Metal loaded biomass semicoke catalyst and preparation method thereof

A biomass, supported technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the weak metal-support interaction and the decrease of catalyst specific surface area , large size of metal particles, etc., to achieve the effect of intermetallic electronic effect and geometric effect, strong ion exchange capacity, catalyst activity and stability improvement

Active Publication Date: 2018-02-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the preparation process of the coke-prepared catalyst is cumbersome. On the other hand, due to the small adsorption capacity of the semi-coke for metal ions and the weak metal-support interaction, the size of the metal particles on the prepared catalyst is large and the activity is insufficient. Moreover, metal particles will block some of the pores of the semi-coke carrier, resulting in a decrease in the specific surface area of ​​the catalyst.

Method used

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  • Metal loaded biomass semicoke catalyst and preparation method thereof
  • Metal loaded biomass semicoke catalyst and preparation method thereof
  • Metal loaded biomass semicoke catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Take 1.487g Ni(NO 3 ) 2 •6H 2 O, 0.434g Fe(NO 3 ) 3 •9H 2 O, prepared as 45mL aqueous solution.

[0049] Weigh 10g of biomass particles, after pickling pretreatment, add to the above mixed aqueous solution, ultrasonically disperse and shake at room temperature for 1h, stir at 30°C for 24h to impregnate with equal volume.

[0050] Dry the impregnated sample at 105°C for 12h, N 2 Under the atmosphere, the temperature was raised from room temperature to 600° C. at a rate of 10° C. / min, and kept for 30 minutes to obtain a Ni-Fe / semi-coke catalyst.

[0051] The mass fractions of Ni and Fe in the catalyst were 10% and 2%, respectively.

[0052] from figure 1 It can be seen from the SEM image that the obtained catalyst has a loose pore structure, and there are secondary pores on the pore wall. The rich pore structure is conducive to the dispersion of metal particles and the mass transfer of reactants. figure 2 The TEM image shows that the active metal nanoparticles a...

Embodiment 2

[0054] Take 2.974g Ni(NO 3 ) 2 •6H 2 O, 0.592g Co(NO 3 ) 2 •6H 2 O, prepared as 45mL aqueous solution.

[0055] Weigh 10g of biomass particles, after pickling pretreatment, add to the above mixed aqueous solution, ultrasonically disperse and shake at room temperature for 1h, stir at 40°C for 48h to impregnate with equal volume.

[0056] Dry the impregnated sample at 110°C for 12h, N 2 Under the atmosphere, the temperature was raised from room temperature to 700° C. at a rate of 8° C. / min, and kept for 60 minutes to obtain a Ni-Co / semi-coke catalyst.

[0057] The mass fractions of Ni and Co in the catalyst were 20% and 4%, respectively.

Embodiment 3

[0059] Take 4.461g Ni(NO 3 ) 2 •6H 2 O, 0.684g Cu(NO 3 ) 2 •3H 2 O, prepared as 45mL aqueous solution.

[0060] Weigh 10g of biomass particles, after pickling pretreatment, add to the above mixed aqueous solution, ultrasonically disperse and shake at room temperature for 1h, stir at 30°C for 24h to impregnate with equal volume.

[0061] Dry the impregnated sample at 110°C for 12h, N 2 Under the atmosphere, the temperature was raised from room temperature to 650° C. at a rate of 5° C. / min, and kept for 45 minutes to obtain a Ni-Cu / semi-coke catalyst.

[0062] The mass fractions of Ni and Cu in the catalyst were 30% and 6%, respectively.

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Abstract

The invention discloses a metal loaded biomass semicoke catalyst and a preparation method thereof. The preparation method comprises the following steps: carrying out equivalent-volume impregnation ona biomass precursor by adopting an aqueous solution of metal active component soluble salt, drying, then heating to the temperature of 600-700 DEG C, and carrying out pyrolysis, so that the metal loaded biomass semicoke catalyst loading metal active components on a biomass semicoke carrier is obtained. The metal active components comprise a reactive metal Ni and a second reactive metal composed ofone of reactive metals Fe, Co and Cu, Ni accounts for 5-30% of the mass of the catalyst, and the second reactive metal accounts for 2-10% of the mass of the catalyst, and the balance is the biomass semicoke catalyst generated through biomass pyrolysis. The catalyst disclosed by the invention has large specific surface area and high dispersity of the metal active components, is used for catalyzinga tar water vapor reforming process of a biomass gasification technology and is high in tar conversion rate.

Description

technical field [0001] The invention belongs to the technical field of biomass energy chemical industry, and in particular relates to a bimetallic supported biomass semi-coke catalyst for catalyzing the reforming of biomass gasification tar and its preparation and application method. Background technique [0002] With the increasingly prominent energy and environmental issues, vigorously developing clean and renewable energy is particularly important today. Biomass is cleaner and more environmentally friendly than fossil fuels, and has abundant reserves. It is the fourth largest energy after coal, oil, and natural gas. Among many biomass conversion technologies, gasification technology has achieved large-scale operation. [0003] However, for a long time, the tar problem has been one of the most important problems in gasification technology, and its content accounts for 5-15% of the total energy of biomass gas. The generation of tar reduces gasification efficiency and gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/02B01J37/08B01J37/16B01J37/34C10J3/00
CPCY02P20/52B01J23/755B01J37/0201B01J37/0207B01J37/082B01J37/088B01J37/16B01J37/343C10J3/00C10J2300/0916C10J2300/0986
Inventor 杜朕屹张志华徐趁李文英冯杰
Owner TAIYUAN UNIV OF TECH
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