Lanthanum calcium iron cobalt calcium titanium ore type catalyst for oxidizing and reforming ethanol and method for preparing catalyst

A perovskite type, ethanol oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve accelerated catalysts, unseen, unfavorable And other problems, to achieve good stability, high anti-carbon performance, high stability effect

Inactive Publication Date: 2013-02-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of oxygen will release additional heat, causing hot spots on the surface of the catalyst, accelerating the sintering of the catalyst, especially the active metal components such as Ni, Co, etc., leading to deactivation, so the addition of oxygen is unfavorable from this point of view
[0003] At present, the catalyst supports used for the oxidative reforming reaction of ethanol are mainly: CeO 2 , ZnO, MgO, ZrO, etc., have not seen the use of La 1-x Ca x Fe 1-y co y o 3 Related literature reports as a catalyst

Method used

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  • Lanthanum calcium iron cobalt calcium titanium ore type catalyst for oxidizing and reforming ethanol and method for preparing catalyst
  • Lanthanum calcium iron cobalt calcium titanium ore type catalyst for oxidizing and reforming ethanol and method for preparing catalyst
  • Lanthanum calcium iron cobalt calcium titanium ore type catalyst for oxidizing and reforming ethanol and method for preparing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The catalyst preparation process is as follows: weigh La(NO 3 ) 3 ·6H 2 O 5.116g, Ca(NO 3 ) 2 4H 2 O 0.307g, Fe(NO 3 ) 3 9H 2 O 4.749g, Co(NO 3 ) 2 ·6H 2 O 0.378g, citric acid 6.521g, polyethylene glycol 400 0.5g, join in the deionized water of 250ml and make solution, stir in the water bath of 85 ℃, stirring rate is 120N / min, evaporate and concentrate to obtain viscous solid, Then dry at 120°C for 24 hours to obtain a foamy solid. Roast in a muffle furnace, heat up to 450°C at a heating rate of 5°C / min for 2 hours, and then heat up to 750°C at a heating rate of 5°C / min Roasted for 6 hours to obtain La 0.9 Ca 0.1 Fe 0.9 co 0.1 o 3 Catalyst 2.783g, yield is 92%.

[0018] The catalyst prepared above is used for the oxidative reforming of ethanol to prepare hydrogen-rich gas:

[0019] The performance test of the catalyst was carried out on a miniature fixed-bed reactor, and the dosage of the catalyst was 75 mg, 40-60 mesh. Use N before reacting 2 Purge f...

Embodiment 2

[0022] The catalyst preparation process is as follows: weigh La(NO 3 ) 3 ·6H 2 O 4.743g, Ca(NO 3 ) 2 4H 2 O 0.640g, Fe(NO 3 ) 3 9H 2 O 4.402g, Co(NO 3 ) 2 ·6H 2 O 0.789g, citric acid 6.800g, polyethylene glycol 400 0.5g, were added to 250ml of deionized water to form a solution, stirred in a water bath at 85°C, the stirring rate was 120N / min, evaporated and concentrated to obtain a viscous solid, Then dry at 120°C for 24 hours to obtain a foamy solid. Roast in a muffle furnace, heat up to 450°C at a heating rate of 5°C / min for 2 hours, and then heat up to 750°C at a heating rate of 5°C / min Roasted for 6 hours to obtain La 0.8 Ca 0.2 Fe 0.8 co 0.2 o 3 Catalyst 2.835g, yield is 94%.

[0023] The catalyst prepared above was used for oxidative reforming of ethanol to prepare hydrogen-rich gas, and the reforming conditions were the same as in Example 1. The test results are as follows: La 0.8 Ca 0.2 Fe 0.8 co 0.2 o 3 The catalyst completely converted ethanol a...

Embodiment 3

[0025] The catalyst preparation process is as follows: weigh La(NO 3 ) 3 ·6H 2 O 4.335g, Ca(NO 3 ) 2 4H 2 O 1.003g, Fe(NO 3 ) 3 9H 2 O 4.024g, Co(NO 3 ) 2 ·6H 2 O 1.236g, citric acid 7.105g, polyethylene glycol 400 0.5g, were added to 250ml of deionized water to form a solution, stirred in a water bath at 85°C, the stirring speed was 120N / min, evaporated and concentrated to obtain a viscous solid, Then dry at 120°C for 24 hours to obtain a foamy solid. Roast in a muffle furnace, heat up to 450°C at a heating rate of 5°C / min for 2 hours, and then heat up to 750°C at a heating rate of 5°C / min Roasted for 6 hours to obtain La 0.7 Ca 0.3 Fe 0.7 co 0.3 o 3 Catalyst 2.895g, yield is 96%, and its chemical formula XRD diffraction pattern is as figure 1 shown.

[0026] The catalyst prepared above was used for oxidative reforming of ethanol to prepare hydrogen-rich gas, and the reforming conditions were the same as in Example 1. The test results are as follows: La 0.7...

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Abstract

The invention discloses a lanthanum calcium iron cobalt calcium titanium ore type catalyst for oxidizing and reforming ethanol and a method for preparing the catalyst. The chemical formula of the catalyst is La1-xCaxFe1-yCoyO3, wherein the x is in a range of 0.1 to 0.5, and the y is in a range of 0.1 to 0.5. The method for preparing the catalyst includes that corresponding metal salt is dissolved in deionized water according to a molar ratio of metal ions to be prepared into a salt solution, citric acids are added according to a molar ratio of the citric acids and the metal ions, citric acids and polyethylene glycol 400 are added in a salt solution according to a molar ratio of the citric acids and the polyethylene glycol, uniform complexes are obtained after stirring, and then the complexes are subjected to evaporation concentration, drying and calcining to obtain the lanthanum calcium iron cobalt calcium titanium ore type catalyst. The lanthanum calcium iron cobalt calcium titanium ore type catalyst for oxidizing and reforming ethanol and the method for preparing the catalyst have the advantages that the manufacture process is simple, and the obtained catalyst has good reactivity and high hydrogen selectivity, and excellent stability and anti-carbon deposition capabilities simultaneously.

Description

technical field [0001] The invention relates to a lanthanum-calcium-iron-cobalt perovskite catalyst for ethanol oxidative reforming and its preparation method, in particular to a method for ethanol oxidative reforming reaction La 1-x Ca x Fe 1-y co y o 3 The catalyst and its preparation method belong to the supported metal catalyst technology for reforming hydrocarbons. Background technique [0002] Co-based catalysts are favored due to their high catalytic activity for ethanol reforming and relatively low price. The interaction between metal Co and the support has a great influence on the catalytic activity, product distribution and stability of the catalyst. In addition, cobalt-based catalysts face sintering and oxidation of metallic cobalt particles, as well as deactivation caused by carbon deposition. By choosing a suitable catalyst carrier, the deactivation of the catalyst can be effectively suppressed. The reported supports for Co-based catalysts are Al 2 o 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/32
Inventor 刘源王自军
Owner TIANJIN UNIV
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