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Preparation method of lithium zirconate material capable of absorbing high-temperature carbon dioxide

A technology of carbon dioxide and lithium zirconate, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve the problems of high synthesis cost and poor product performance, and achieve the effects of excellent absorption performance, low cost and convenient operation

Inactive Publication Date: 2019-01-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in this field, the technology of obtaining lithium zirconate adsorbent is either high in synthesis cost or poor in product performance. Therefore, how to obtain high-performance lithium zirconate adsorbent at low cost is an important technical problem in this field.

Method used

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  • Preparation method of lithium zirconate material capable of absorbing high-temperature carbon dioxide
  • Preparation method of lithium zirconate material capable of absorbing high-temperature carbon dioxide
  • Preparation method of lithium zirconate material capable of absorbing high-temperature carbon dioxide

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Effect test

Embodiment 1

[0019] The reaction raw materials are zirconium oxynitrate, lithium hydroxide and ammonium bicarbonate, and the lithium zirconate high-temperature adsorbent is prepared by a precipitation method in an ammonia solution. ZrO(NO 3 ) 2 Dissolve in deionized water, add ammonia water according to the ammonia concentration in the reaction system of 0.8mol / L, weigh a certain amount of LiOH·H 2 O, drop LiOH and ammonium bicarbonate solution into ZrO(NO 3 ) 2 solution, stirred for 1 h after titration, then evaporated to dryness, placed the obtained material in an oven, and dried at a constant temperature at 100°C for 12 h in an air atmosphere to obtain a lithium zirconate precursor. After grinding the obtained precursor powder evenly, put In a tube furnace, raise the temperature to 550°C at a rate of 5°C / min and hold for 6 hours to obtain the lithium zirconate material.

[0020] The synthesized lithium zirconate material was placed in a thermogravimetric analyzer under CO 2 :N 2 =...

Embodiment 2

[0022] The reaction raw materials are zirconium oxynitrate, lithium hydroxide and sodium bicarbonate, and the lithium zirconate high-temperature adsorbent is prepared by a precipitation method in an ammonia solution. ZrO(NO 3 ) 2 Dissolve in deionized water, add ammonia water according to the ammonia concentration in the reaction system is 0.8mol / L, weigh a certain amount of LiOH·H 2 O, drop LiOH and ammonium bicarbonate solution into ZrO(NO 3 ) 2 solution, stirred for 1 h after titration, then evaporated to dryness, placed the obtained material in an oven, and dried at a constant temperature at 100°C for 12 h in an air atmosphere to obtain a lithium zirconate precursor. After grinding the obtained precursor powder evenly, put In a tube furnace, raise the temperature to 550°C at a rate of 5°C / min and hold for 6 hours to obtain the lithium zirconate material.

[0023]The synthesized lithium zirconate material was placed in a thermogravimetric analyzer under CO 2 :N 2 =1:7...

Embodiment 3

[0025] The reaction raw materials are zirconium oxynitrate, lithium hydroxide and ammonium bicarbonate, and the lithium zirconate high-temperature adsorbent is prepared by a precipitation method in an ammonia solution. ZrO(NO 3 ) 2 Dissolve in deionized water, add ammonia water according to the ammonia concentration in the reaction system of 0.8mol / L, weigh a certain amount of LiOH·H 2 O, drop LiOH and ammonium bicarbonate solution into ZrO(NO 3 ) 2 solution, stirred for 1 h after titration, then evaporated to dryness, placed the obtained material in an oven, and dried at a constant temperature at 100°C for 12 h in an air atmosphere to obtain a lithium zirconate precursor. After grinding the obtained precursor powder evenly, put In a tube furnace, raise the temperature to 550°C at a rate of 5°C / min and hold for 6 hours to obtain the lithium zirconate material.

[0026] The synthesized lithium zirconate material was placed in a thermogravimetric analyzer under CO 2 :N 2 =...

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Abstract

The invention discloses a preparation method of a lithium zirconate material (Li2ZrO3) capable of absorbing high-temperature carbon dioxide. The preparation method comprises: carrying out a precipitation reaction in an ammonia water solution by using zirconyl nitrate as a zirconium source, using lithium hydroxide as a lithium source and using carbonate radical as a precipitating agent, filtering or evaporating to remove water, drying, and calcining to obtain the lithium zirconate adsorbent. According to the present invention, the method has advantages of low preparation temperature and convenient process operation, and is suitable for scale production; and the prepared material has advantages of high purity, uniform and fine particles, good crystallinity, excellent CO2 absorption performance and low production cost.

Description

technical field [0001] The invention relates to a preparation method of lithium zirconate material for absorbing carbon dioxide at high temperature. This material directly absorbs a large amount of high-temperature carbon dioxide gas in the exhaust gas of power plants, and recovers carbon resources. Background technique [0002] In recent years, with the rapid economic development and accelerated industrialization process, CO 2 Emissions are increasing, CO as the main greenhouse gas 2 The resulting environmental problems have attracted widespread attention from all over the world. The burning of fossil fuels is CO 2 The main source of emissions, while for the high temperature CO discharged from the flue gas 2 Cooling and recycling will not only seriously lose energy, but also increase the absorption of CO 2 the cost of. Therefore, for the use of fossil fuel energy, efficient and low-cost carbon dioxide capture and storage technologies are urgently needed. However, res...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30B01D53/12C01G25/00
CPCB01D53/12B01D2257/504B01J20/04C01G25/00Y02C20/40Y02P20/151
Inventor 桂建舟刘丹王平平张鹏刘成伟马爱静杨丽霞梁琪
Owner TIANJIN POLYTECHNIC UNIV
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