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Preparation and measuring method of mixed conductor ceramic membrane used for H2S decomposition

A hybrid conductor, ceramic membrane technology, applied in the direction of material analysis using radiation diffraction, can solve problems such as inability to operate for a long time, and achieve the effects of improved decomposition rate, low material cost, and excellent hydrogen permeability

Inactive Publication Date: 2016-02-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of an additional catalyst, the conversion rate of hydrogen can be increased, but because hydrogen sulfide is an acidic and corrosive gas, most membrane materials and catalysts cannot be operated for a long time

Method used

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  • Preparation and measuring method of mixed conductor ceramic membrane used for H2S decomposition
  • Preparation and measuring method of mixed conductor ceramic membrane used for H2S decomposition
  • Preparation and measuring method of mixed conductor ceramic membrane used for H2S decomposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 7.93gLa 2 o 3 Dissolved in concentrated nitric acid, 2.054gWO 3 Dissolve in ammonia water to obtain a solution, and then add citric acid for complexation, wherein the number of moles of metal ions in each solution: the number of moles of citric acid = 1:2, and add ammonia water to adjust the pH to neutral, and mix the solutions. Heat and stir at 120°C for 48 hours until a viscous gel remains, heat in an electric furnace and burn it to obtain the precursor of the powder. Put the precursor of this powder into a muffle furnace to raise the temperature to 900°C at a rate of 2°C / min, keep it for 10 hours, and then lower it to room temperature at a rate of 2°C / min to obtain the phase-formed powder of the material body shape.

[0035](2) Put the powder of this material in a mortar and grind it evenly, then weigh about 1.0g of the powder, put it in a stainless steel abrasive tool with an inner diameter of 16mm, and keep it under the pressure of 20MPa for 10min to obt...

Embodiment 2

[0041] (1) 8.2545gLa 2 o 3 and 0.3431gRe were dissolved in concentrated nitric acid, 1.7087gWO 3 Dissolve in ammonia water, and then add citric acid respectively, wherein the number of moles of metal ions in each solution: the number of moles of citric acid = 1:2, and add ammonia water to adjust the pH to neutral, and mix the solutions. Heat and stir at 120°C for 48 hours until a viscous gel remains, heat in an electric furnace and burn it to obtain the precursor of the powder. Put the precursor of this powder into a muffle furnace and raise the temperature to 900°C at a rate of 2°C / min, keep it for 10 hours, and then lower it to room temperature at a rate of 2°C / min to obtain the powder form of the material .

[0042] (2) Put the powder of this material in a mortar and grind it evenly, then weigh about 1.0g of the powder, put it in a stainless steel abrasive tool with an inner diameter of 16mm, and keep it under the pressure of 20MPa for 10min to obtain a powder membrane ...

Embodiment 3

[0049] (1) Add 14.9972gNd 2 o 3 Dissolved in concentrated nitric acid, 1.3154gWO 3 and 1.1668gMoO 3 Dissolve them in ammonia water respectively, and then add citric acid respectively, wherein the number of moles of metal ions in each solution: the number of moles of citric acid = 1:2, and add ammonia water to adjust the pH to neutral, and mix the solutions. Heat and stir at 120°C for 48 hours until a viscous gel remains, heat in an electric furnace and burn it to obtain the precursor of the powder. Put the powder into a muffle furnace to raise the temperature to 900°C at a rate of 2°C / min, keep it for 10 hours, and then lower it to room temperature at a rate of 2°C / min to obtain the powder form of the material.

[0050] (2) Put the powder of this material in a mortar and grind it evenly, then weigh about 1g of the powder, put it in a stainless steel abrasive tool with an inner diameter of 16mm, and keep it under the pressure of 20MPa for 10min to obtain a raw powder membran...

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Abstract

The invention discloses a preparation and measuring method of a mixed conductor ceramic membrane used for H2S decomposition. The preparation and measuring method comprises following steps: a precursor of the mixed conductor ceramic membrane is prepared via a certain method; the precursor is subjected to calcining in a furnace for a certain period of time so as to obtain a phase-formed powder; shaping is realized via a certain method, and sintering is carried out so as to obtain the finished product material with special shapes. The finished product material is delivered into a testing device, and H2S decomposition testing is carried out at certain operation conditions. The preparation method is simple and feasible; production efficiency is high; cost is low; material operation stability is excellent; and the preparation method is convenient for industrialized large-scale production.

Description

technical field [0001] The invention belongs to the field of mixed conductor materials, and relates to a ceramic membrane resistant to hydrogen sulfide atmosphere and capable of conducting hydrogen, in particular to a ceramic membrane for H 2 Preparation and testing methods of S-decomposed mixed conductor ceramic membranes. Background technique [0002] In recent years, with the continuous development of China's economy, the oil import volume has increased year by year, and it has exceeded 1*10 8 t. These imported oils mainly come from the Middle East, Russia and other places, and the sulfur content is as high as 0.6%~2.0%. Based on this sulfur content, H 2 S gas 600~2000t. In addition, 90% of the waste in the natural gas chemical process in my country is also H 2 S. Hydrogen sulfide is a colorless and highly toxic acid gas. Even low concentrations of hydrogen sulfide can damage people's sense of smell, so its emission is subject to strict environmental protection restr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622G01N23/20
CPCC04B35/50C04B35/622C04B2235/3256C04B2235/3258C04B2235/40C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/76C04B2235/9669G01N23/20
Inventor 王海辉刘慧
Owner SOUTH CHINA UNIV OF TECH
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