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Nickel-doped brownmillerite type oxygen carrier as well as preparation method and application thereof

A technology of oxygen carrier and andorite, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of low activity of oxygen carrier, low carbon conversion efficiency, poor stability, etc., achieve high activity and improve hydrogen production capacity , to promote the release effect

Active Publication Date: 2021-05-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above defects of the prior art, the present invention provides a method for preparing a Ni-doped anderite-type oxygen carrier, by doping Ni into Ca 2 Fe 2 o 5 In, with the help of the C-H decoupling ability of nickel oxide, and Ca 2 Fe 2 o 5 Unique advantages in hydrogen production, the chemical chain reforming synthesis gas technology is coupled with the chemical chain hydrogen production technology, and high-quality synthesis gas and pure hydrogen can be obtained in one process at the same time, thereby solving the problem of Ca 2 Fe 2 o 5 Low oxygen carrier activity, low carbon conversion efficiency, poor stability, etc.

Method used

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  • Nickel-doped brownmillerite type oxygen carrier as well as preparation method and application thereof
  • Nickel-doped brownmillerite type oxygen carrier as well as preparation method and application thereof
  • Nickel-doped brownmillerite type oxygen carrier as well as preparation method and application thereof

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Effect test

Embodiment 1

[0034] A nickel-doped anderite-type oxygen carrier prepared by the following method:

[0035] Weigh 0.20mol of calcium nitrate Ca(NO 3 ) 2 , 0.175mol of iron nitrate Fe(NO 3 ) 3 , 0.025mol nickel nitrate Ni(NO 3 ) 2 , Put 1.20mol of citric acid in a beaker, add 1000ml of deionized water into the beaker, transfer the beaker to a 95°C oil bath, heat and stir for 8h to obtain the precursor. Dry the precursor in a constant temperature drying oven at 105°C for 12 hours, then put it into a muffle furnace and calcinate it at 1000°C for 10 hours to obtain nickel-doped willorite-type oxygen carrier, denoted as Ca 2 Fe 1.75 Ni 0.25 o 5 oxygen carrier.

Embodiment 2

[0037]A nickel-doped anderite-type oxygen carrier prepared by the following method:

[0038] Weigh 0.20mol of calcium nitrate Ca(NO 3 ) 2 , 0.150mol of iron nitrate Fe(NO 3 ) 3 , 0.050mol nickel nitrate Ni(NO 3 ) 2 , Put 1.20mol of citric acid in a beaker, add 1000ml of deionized water into the beaker, transfer the beaker to a 95°C oil bath, heat and stir for 8h to obtain the precursor. Dry the precursor in a constant temperature drying oven at 105°C for 12 hours, then put it into a muffle furnace and calcinate it at 1000°C for 10 hours to obtain nickel-doped willorite-type oxygen carrier, denoted as Ca 2 Fe 1.50 Ni 0.50 o 5 oxygen carrier.

Embodiment 3

[0040] A nickel-doped anderite-type oxygen carrier prepared by the following method:

[0041] Weigh 0.2mol of calcium nitrate Ca(NO 3 ) 2 , 0.125mol of iron nitrate Fe(NO 3 ) 3 , 0.075mol nickel nitrate Ni(NO 3 ) 2 , Put 1.20mol of citric acid in a beaker, add 1000ml of deionized water into the beaker, transfer the beaker to a 95°C oil bath, heat and stir for 8h to obtain the precursor. Dry the precursor in a constant temperature drying oven at 105°C for 12 hours, then put it into a muffle furnace and calcinate it at 1000°C for 10 hours to obtain nickel-doped willorite-type oxygen carrier, denoted as Ca 2 Fe 1.25 Ni 0.75 o 5 oxygen carrier.

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Abstract

The invention belongs to the technical field of chemical looping combustion oxygen carriers, and particularly relates to a nickel-doped brownmillerite type oxygen carrier as well as a preparation method and application thereof. The preparation method comprises the following steps: adding water into a calcium salt, a nickel salt, an iron salt and an organic acid, conducting dissolving, then uniformly conducting mixing to obtain a precursor, drying the precursor, and conducting calcining at 900-1200 DEG C for 10 hours to obtain the nickel-doped brownmillerite type oxygen carrier. Compared with the existing chemical looping technology, the method for co-preparing hydrogen and synthesis gas by using the nickel-doped brownmillerite type oxygen carrier disclosed by the invention overcomes the application defect of bio-oil in the chemical looping technology, and can promote higher-value utilization of the bio-oil to obtain richer energy products; and the economical efficiency is better, the practicability is higher, and the application prospect is wider.

Description

technical field [0001] The invention belongs to the technical field of chemical looping combustion oxygen carriers, and in particular relates to a nickel-doped anderite-type oxygen carrier and its preparation method and application. Background technique [0002] Hydrogen is an ideal clean energy with high energy density, and the development of hydrogen energy economy can reduce the emission of greenhouse gases and fine particles. Countries and regions around the world regard hydrogen energy as the strategic development direction of new energy in the future, and actively build a hydrogen energy low-carbon society. my country is the world's largest hydrogen production country, and its industrial hydrogen production leads the world. Coal hydrogen production is one of my country's main hydrogen production technologies. However, coal-to-hydrogen technology has disadvantages such as complex equipment structure, relatively low operating cycle, high desulfurization investment, many...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01B3/02C01B3/06
CPCC01G53/006C01B3/02C01B3/063Y02E60/36
Inventor 许婷婷王训肖波蒋聪
Owner HUAZHONG UNIV OF SCI & TECH
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