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Cobalt-cerium/sepiolite catalyst as well as preparation method and application thereof

A sepiolite and catalyst technology, which is applied in the field of cobalt-cerium/sepiolite catalyst and its preparation, can solve the problems of unfavorable large-scale industrial application and high price, and achieve enhanced reforming performance and service life, enhanced service life, Effect of improving conversion rate and hydrogen production efficiency

Active Publication Date: 2019-06-07
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, noble metal catalysts show high catalytic activity in reforming hydrogen production, but their expensive price is not conducive to large-scale industrial application

Method used

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  • Cobalt-cerium/sepiolite catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The content of active component cobalt (Co) in the cobalt-cerium / sepiolite catalyst prepared in this embodiment is 5wt.%, the content of additive cerium (Ce) is 3wt.%, and the remaining ingredients are sepiolite. Preparation method as follows:

[0037] Take 10.00 g of sepiolite raw material, add it to 5 mol / L nitric acid, stir it magnetically for 2 hours in a constant temperature water bath at 40°C, then carry out suction filtration, washing, drying, and mechanical crushing to obtain solid powder I; put solid powder I in a tube In a type furnace, it was heated to 400°C at a heating rate of 1°C / min, and then calcined in an air atmosphere for 4 hours to obtain purified sepiolite; weigh 1.2346g Co(NO 3 ) 2 ·6H 2 O, 0.4648g Ce(NO 3 ) 3 ·6H 2 O and 2.9052g cetyltrimethylammonium bromide (surfactant to metal ion molar ratio S / M=1.5) were placed in a 250mL round bottom beaker and dissolved in 100mL deionized water to form solution I. Weigh 4.4043 g of the purified sepiol...

Embodiment 2

[0039] The content of active component cobalt (Co) in the cobalt-cerium / sepiolite catalyst prepared in this embodiment is 15wt.%, the content of additive cerium (Ce) is 24wt.%, and the remaining ingredients are sepiolite. Preparation method as follows:

[0040] Take 10.00 g of sepiolite raw material, add it to 10 mol / L nitric acid, and stir it magnetically for 4 hours under constant temperature water bath at 80°C, then carry out suction filtration, washing, drying, and mechanical crushing to obtain solid powder I; put solid powder I in a tube In a type furnace, heated to 700°C at a heating rate of 4°C / min, and then calcined in an air atmosphere for 2 hours to obtain purified sepiolite; weigh 2.6229g CH 3 COOCo·4H 2 O, 2.5336g CH 3 COOCe·xH 2 O and 4.5626g polysorbate 80 (surfactant and metal ion molar ratio S / M=0.5) were placed in a 250mL round bottom beaker and added to 100mL deionized water to completely dissolve to form solution I. Weigh 2.5046 g of the purified sepioli...

Embodiment 3

[0042] The content of active component cobalt (Co) in the cobalt-cerium / sepiolite catalyst prepared in this embodiment is 10wt.%, the content of additive cerium (Ce) is 8wt.%, and the remaining ingredients are sepiolite. Preparation method as follows:

[0043] Take 10.00 g of sepiolite raw material, add it to 6 mol / L nitric acid, and stir it magnetically for 4 hours under the condition of constant temperature water bath at 55°C, then carry out suction filtration, washing, drying, and mechanical crushing to obtain solid powder I; put solid powder I in a tube In a type furnace, heated to 700°C at a heating rate of 4°C / min, and then calcined in air atmosphere for 1.5h to obtain purified sepiolite; weigh 1.2346g Co(NO 3 ) 2 ·6H 2 O, 0.7373g CH 3 COOCe·xH 2 O and 2.0466g sodium lauryl sulfate (surfactant and metal ion molar ratio S / M=1) were placed in a 250mL round bottom beaker and added to 100mL deionized water to completely dissolve to form solution I. Weigh 4.2595 g of the...

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Abstract

The invention discloses a cobalt-cerium / sepiolite catalyst as well as a preparation method and application thereof. The catalyst comprises sepiolite serving as a carrier and cobalt and cerium which are loaded on the sepiolite and serve as active components. In the cobalt-cerium / sepiolite catalyst, cerium dioxide is used as an auxiliary agent component to interact with cobalt in the calcination andreduction processes, so that the conversion rate, the hydrogen yield and the stability of the bio-oil and the model thereof are improved. Meanwhile, cerium dioxide is used as an auxiliary agent to generate rapid oxidation-reduction circulation in the reforming process for oxygen transfer, so that the conversion rate and the hydrogen production efficiency of carbon-containing species are improved,carbon deposition is prevented from covering metal sites, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a cobalt-cerium / sepiolite catalyst and its preparation method and application. Background technique [0002] In recent years, the efficient use of biomass energy is the main way to solve the energy crisis and alleviate the deterioration of the ecological environment. At present, one of the more mature processes for biomass utilization is the high-temperature pyrolysis of biomass under anoxic conditions to prepare bio-oil. Bio-oil is not a real solution, but an emulsion. Different components exist in bio-oil with different droplet sizes, and bio-oil has certain acidity, rich in water and oxygen, As a result, its calorific value is low, and it is easy to corrode equipment, so it cannot be directly used in internal combustion engines. To improve the combustion characteristics of bio-oil, the bio-oil must be strictly dehydrated and deoxidized. This will undoubtedly increase the cost of bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10C01B3/32
Inventor 陈明强汪春生王一双汤志远杨忠连张涵王君
Owner ANHUI UNIV OF SCI & TECH
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