Preparation method of nickel-modified calcium-based dual-functional particles

A dual-function, nickel-modified technology, applied in chemical instruments and methods, other chemical processes, physical/chemical process catalysts, etc., can solve the problems of low hydrogen yield and complex preparation process, and meet high equipment requirements and equipment requirements. No, the effect of large adsorption capacity

Inactive Publication Date: 2014-04-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prepared catalyst can catalyze the reforming reaction of ethanol and increase the yield of hydrogen, but the experiment proves that the yield of hydrogen is low, only about 30%, and the preparation process is relatively complicated

Method used

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  • Preparation method of nickel-modified calcium-based dual-functional particles
  • Preparation method of nickel-modified calcium-based dual-functional particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 9.42g of calcium acetate, 0.45g of nickel nitrate and 5.62g of citric acid, add distilled water and stir to dissolve them completely, keep stirring the solution at 100°C and dry it, then calcinate at 900°C for 3 hours and crush to obtain 24-50 mesh nickel Modified calcium-based bifunctional particles, wherein the mass of Ni in the nickel-modified calcium-based bifunctional particles accounts for 15% of the mass of CaO. In the adsorption-enhanced ethanol steam reforming hydrogen production reaction, 1.19 g of this bifunctional particle was used as a catalyst, and the space velocity of ethanol was 20 h -1 , the water-to-carbon ratio is 3:1, the reaction pressure is 0.1MPa, the pre-reduction temperature is 700°C, and the reaction temperature is 600°C.

Embodiment 2

[0027] Weigh 9.42g of calcium acetate, 0.6g of nickel nitrate and 5.62g of citric acid, add distilled water and stir to dissolve them completely, keep stirring the solution at 120°C and dry it, then calcinate at 1100°C for 5 hours and crush to obtain 24~50 mesh nickel Modified calcium-based bifunctional particles, wherein the mass of Ni in the nickel-modified calcium-based bifunctional particles accounts for 10% of the mass of CaO. In the adsorption-enhanced ethanol steam reforming hydrogen production reaction, 1.19 g of this bifunctional particle was used as a catalyst, and the space velocity of ethanol was 55 h -1 , the water-to-carbon ratio is 5:1, the reaction pressure is 0.2MPa, the pre-reduction temperature is 700°C, and the reaction temperature is 500°C.

Embodiment 3

[0029] Weigh 9.42g of calcium acetate, 0.3g of nickel nitrate and 5.62g of citric acid, add distilled water and stir to dissolve them completely, keep stirring the solution at 80°C and dry it, and then calcined at 700°C for 2 hours and crush to obtain 24~50 mesh nickel Modified calcium-based bifunctional particles, wherein the mass of Ni in the nickel-modified calcium-based bifunctional particles accounts for 10% of the mass of CaO. In the adsorption-enhanced ethanol steam reforming hydrogen production reaction, 1.19 g of this bifunctional particle was used as a catalyst, and the space velocity of ethanol was 11 h -1 , the water-to-carbon ratio is 1.5:1, the reaction pressure is 0.3MPa, the pre-reduction temperature is 700°C, and the reaction temperature is 500°C.

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Abstract

The invention discloses a preparation method of nickel-modified calcium-based dual-functional particles, and belongs to the technical field of energy. The preparation method is characterized in that the sol-gel method is carried out, citric acid is added to enable ion complexing such as Ca<2+> as well as promote the formation of small holes in the particles during roasting, and thus the absorption efficiency and catalyzing effect are greatly improved. The preparation method is applied to absorption strengthened type steam reforming hydrogen production reaction of a biomass-derived compound, and also shows obvious effect on catalyzing ethanol.

Description

technical field [0001] The invention relates to a preparation method of nickel-modified calcium-based bifunctional particles, which belongs to the field of energy technology, and specifically relates to a method for ethanol adsorption-enhanced steam reforming hydrogen production reaction to improve hydrogen yield. Background technique [0002] The extensive utilization of biomass energy has produced a large number of biomass derivatives, among which the utilization of bioethanol has received worldwide attention. For bio-ethanol, sugar is converted into ethanol by microorganisms through fermentation, and then obtained through distillation and other processes. In the mature alcohol after fermentation, the ethanol content is generally between 7% and 11%, and impurities such as water and acids account for almost 90%. [0003] Therefore, during the production of ethanol, distillation and dehydration account for about 50% of the cost and consume a lot of energy. Therefore, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J23/78C01B3/40
CPCY02P20/52
Inventor 王文举张鹏刑兵
Owner NANJING UNIV OF SCI & TECH
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