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High active calcium-base CO2 absorbent and its preparing method

An absorbent and high-activity technology, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve problems such as activity decline, carbon dioxide absorption capacity reduction, and obstacles to large-scale application of technology, and achieve stable and high reactivity. The effect of carbon dioxide absorption capacity

Inactive Publication Date: 2005-10-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the reforming hydrogen production reaction is a continuous and cyclic reaction process, the carbon dioxide absorbent is required to have high activity and stability. The reduced phenomenon hinders the large-scale application of this technology in industry

Method used

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  • High active calcium-base CO2 absorbent and its preparing method
  • High active calcium-base CO2 absorbent and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation raw materials: 2-propanol, distilled water, aluminum nitrate 9 water, CaO

[0028] Preparation steps:

[0029] (1) calcining calcium oxide at 900°C for 2 hours;

[0030] (2 Add weighed calcined calcium oxide at 25°C, then add isopropanol, then add distilled water;

[0031] (3) adding aluminum nitrate 9 water;

[0032] (4) stirring in a constant temperature water bath at 75°C for 1 hour;

[0033] (5) Dry at 100°C until the moisture in the sample evaporates, and record the drying time;

[0034] (6) Take out the dried sample, calcinate it at 500° C. for 3 hours, then take it out, and grind the sample finely.

[0035] (7) Add distilled water and dry at 80°C for 2 hours;

[0036] (8) calcining the dried sample at 900°C for 1.5 hours;

[0037] (9) Grind the sample finely to make highly active calcium-based CO 2 absorbent.

[0038] CaO / Ca 12 Al 14 o 33 CaO(g)Al(NO 3 ) 3 .9H 2 O (g) distilled water (ml) (CH 3 ) 2 CHOH (mol)

Embodiment 2

[0040] Preparation raw materials: ethanol, distilled water, anhydrous aluminum chloride, calcium oxide

[0041] Preparation steps:

[0042] (1) calcining calcium oxide at 800°C for 4 hours;

[0043] (2) add weighed calcined calcium oxide at room temperature, then add ethanol, then add distilled water;

[0044] (3) adding aluminum salt;

[0045] (4) stirring in a constant temperature water bath at 75°C for 1 hour;

[0046] (5) Dry at 100°C until the moisture in the sample evaporates;

[0047] (6) Take out the dried sample, calcinate it at 600°C for 3 hours, then take it out, grind the sample finely;

[0048] (7) Add distilled water and dry at 80°C for 2 hours;

[0049] (8) Calcining the dried sample at 700° C. for 3 hours.

[0050] (9) Grind the sample finely to make highly active calcium-based CO 2 absorbent.

[0051] CaO / Ca 12 Al 14 o 33 CaO(g)AlCl 3 (g) distilled water (ml) CH 3 CH 2 OH (mol)

Embodiment 3

[0053] Preparation raw materials: methanol, distilled water, aluminum nitrate 9 water, CaO

[0054] Preparation steps:

[0055] (1) calcining calcium oxide at 1000°C for 1 hour;

[0056] (2) Add weighed calcined calcium oxide at 25°C, then add methanol, then add distilled water;

[0057] (3) adding aluminum nitrate 9 water;

[0058] (4) stirring in a constant temperature water bath at 75°C for 1 hour;

[0059] (5) Dry at 100°C until the moisture in the sample evaporates, and record the drying time;

[0060] (6) Take out the dried sample, calcinate it at 700°C for 3 hours, then take it out, grind the sample finely;

[0061] (7) Add distilled water and dry at 80°C for 2 hours;

[0062] (8) calcining the dried sample at 1100° C. for 1 hour;

[0063] (9) Grind the sample finely to make highly active calcium-based CO 2 absorbent.

[0064] CaO / Ca 12 Al 14 o 33 CaO(g)Al(NO 3 ) 3 .9H 2 O (g) distilled water (ml) CH 3 OH (mol)

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Abstract

The present invention relates to a high-activity calcium base CO2 obsorbent and its preparation method. The described method uses alcohols, distilled water, aluminium salt and calcium oxide as raw material, and includes the following steps: calcining for 1-4 hr. at 800-1000 deg.C, adding alcohols and distilled water, calcining dried sample for 3 hr, at 500-700 deg.C, grinding, more adding distilled water, drying, calcining dried sample for 1-3 hr, at 700-1000 deg.C, fine grinding so as to obtain the invented high-activity calcium base CO2 absorbent.

Description

technical field [0001] The invention relates to a highly active calcium-based CO 2 Absorbent (CaO / Ca 12 Al 14 o 33 ) and a preparation method thereof, which belong to the technical field of solid absorbent for absorbing gas. It can be used as a carbon dioxide absorbent in the steam methane reforming hydrogen production process to improve hydrogen purity, methane conversion rate and overall system efficiency; 2 The acceptor method has a wide range of application prospects in the hydrogen production process of near-zero emission carbon-based fuels; it is also suitable for the greenhouse gas CO in various industrial exhaust gases 2 Separation process; can also be used as CO 2 Highly active reactive substances for chemical heat pumps with mobile working fluids. Background technique [0002] At present, among all possible hydrogen production technologies, natural gas steam reforming is the most mature. In 2002, 48% of the world's hydrogen production was provided by the natu...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/62B01D53/81B01J20/04
CPCB01D2251/404B01D2257/504Y02A50/20Y02C20/40
Inventor 蔡宁生李振山黄煜煜
Owner TSINGHUA UNIV
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