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Oxygen carrier for chemical looping hydrogen generation, preparation method and applications thereof

An oxygen carrier and chemical chain technology, applied in the field of chemical chain hydrogen production, can solve the problems of inability to withstand high temperature, limited oxygen carrying rate, and poor cyclic reaction ability.

Active Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems in the prior art that the oxygen carrier of chemical chain hydrogen production has limited oxygen carrying rate, poor cycle reaction ability, and inability to withstand high temperature, the present invention intends to provide an oxygen carrier with iron oxide as the active component, and Molybdenum oxide is used as an auxiliary agent, and alumina is used as a carrier. The oxygen carrier of the present invention has a high oxygen carrying rate and a high recycling rate.

Method used

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  • Oxygen carrier for chemical looping hydrogen generation, preparation method and applications thereof
  • Oxygen carrier for chemical looping hydrogen generation, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 116g, 80~100 mesh Al 2 O 3 The pellets were placed in a rotary evaporator flask, and the temperature of the water bath was maintained at 65°C. Weigh 20g Fe(NO 3 ) 3 ·9H 2 O, 1.3g (NH 4 ) 6 ·Mo 7 O 24 ·4H 2 O, put it into a 500mL beaker, add 100mL deionized water to make a mixed solution, turn on the vacuum pump after dissolving, and suck the mixed solution into the flask, and the rotation speed of the flask is 100r / min. After the solution has evaporated completely, remove the Al 2 O 3The pellets were then dried in a drying oven at 110 °C for 24 hours, and calcined in a muffle furnace at 900 °C for 6 hours to obtain the oxygen carrier Fe 2 O 3 -MoO 3 / Al 2 O 3 , where Fe 2 O 3 The mass content is 20%, MoO 3 The mass content is 5%, Al 2 O 3 The mass content is 75%.

Embodiment 2

[0030] Weigh 116g, 80~100 mesh Al 2 O 3 The pellets were placed in a rotary evaporator flask, and the temperature of the water bath was maintained at 65°C. Weigh 20g Fe(NO 3 ) 3 ·9H 2 O, 6.7g (NH 4 ) 6 ·Mo 7 O 24 ·4H 2 O, put it into a 500mL beaker, add 100mL deionized water to make a mixed solution, turn on the vacuum pump after dissolving, and suck the mixed solution into the flask, and the rotation speed of the flask is 100r / min. After the solution has evaporated completely, remove the Al 2 O 3 The pellets were then dried in a drying oven at 110 °C for 24 hours, and calcined in a muffle furnace at 900 °C for 6 hours to obtain the oxygen carrier Fe 2 O 3 -MoO 3 / Al 2 O 3 , where Fe 2 O 3 The mass content is 20%, MoO 3 The mass content is 20%, Al 2 O 3 The mass content is 60%.

Embodiment 3

[0032] Weigh 116g, 80~100 mesh Al 2 O 3 The pellets were placed in a rotary evaporator flask, and the temperature of the water bath was maintained at 65°C. Weigh 10g Fe(NO 3 ) 3 ·9H 2 O, 1.05g (NH 4 ) 6 ·Mo 7 O 24 ·4H 2 O, put it into a 500mL beaker, add 100mL deionized water to make a mixed solution, turn on the vacuum pump after dissolving, and suck the mixed solution into the flask, and the rotation speed of the flask is 100r / min. After the solution has evaporated completely, remove the Al 2 O 3 The pellets were then dried in a drying oven at 110 °C for 24 hours, and calcined in a muffle furnace at 900 °C for 6 hours to obtain the oxygen carrier Fe 2 O 3 -MoO 3 / Al 2 O 3 , where Fe 2 O 3 The mass content is 10%, MoO 3 The mass content is 5%, Al 2 O 3 The mass content is 85%.

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Abstract

The present invention provides an oxygen carrier for chemical looping hydrogen generation, a preparation method and applications thereof. According to the present invention, the oxygen carrier comprises, by mass, 5-65% of Fe2O3, 5-35% of MoO3 and 30-90% of Al2O3; the oxygen carrier is prepared through a dipping method and can be used for chemical looping hydrogen generation, wherein an alumina carrier is dipped in a soluble solution containing iron and molybdenum, and drying and roasting are performed to prepare the oxygen carrier; molybdenum oxide as the auxiliary agent is added to the oxygencarrier, and the conversion between Mo<6+> and Mo<3+> forms a redox cycle, such that the redox reaction can be promoted, and the reducibility of the active component iron oxide can be easily improved; the dispersity of iron oxide can be improved with molybdenum oxide, such that the particle of the iron oxide can be reduced so as to improve the stability of the oxygen carrier; and the oxygen carrier is suitable for carrying out the reaction at the high temperature, has advantages of good thermal stability, cheap and easily available raw materials and simple preparation method, and is suitablefor industrial applications.

Description

technical field [0001] The invention relates to an oxygen carrier for chemical chain cycle hydrogen production and a preparation method thereof, and belongs to the catalyst technology in the field of chemical chain hydrogen production. Background technique [0002] At present, with the rapid growth of population, the deepening of industrialization and the increasing demand for energy, the generation of electricity based on fossil fuels not only meets the demand for energy, but also brings great environmental hazards, among which the combustion of fossil fuels CO emitted 2 cause CO in the atmosphere 2 Concentrations are increasing and the greenhouse effect is intensifying, thus from CO during the combustion of fossil fuels 2 The control and emission reduction of China has received close attention from the international community. [0003] To control CO during coal-fueled electricity generation 2 emissions, associated with increased power generation efficiency and the use ...

Claims

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Application Information

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IPC IPC(8): C01B3/06
CPCY02E60/36
Inventor 梁皓孙兆松尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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