A nickel-doped anderite-type oxygen carrier and its preparation method and application

Abstract

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. The preparation method of the present invention includes dissolving calcium salts, nickel salts, iron salts and organic acids in water and mixing them uniformly to obtain a precursor, drying the precursors, and calcining at 900-1200°C for 10 hours to obtain nickel-doped willorite-type oxygen carrier. Compared with the existing chemical chain technology, the method for co-preparing hydrogen and syngas by nickel-doped andoridite-type oxygen carrier of the present invention overcomes the application defects of bio-oil in chemical chain technology, and can promote higher-value utilization of bio-oil. Get more abundant energy products; better economy, stronger practicability, and broader application prospects.

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...

Examples

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.

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...

Examples

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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