Nano-structure supported solid regenerative polyamine and polyamine polyol absorbents for the separation of carbon dioxide from gas mixtures including the air

一种气体混合物、二氧化碳的技术，应用在用于材料和表面科学的纳米技术、有机化合物的制备、从含氧有机化合物制烃等方向，能够解决有效性降低等问题，达到解决腐蚀和蒸发问题的效果

Active Publication Date: 2009-08-05
UNIV OF SOUTHERN CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the volatility of DEA under desorption conditions, the effectiveness of this absorbent generally increases with increasing CO 2 (approximately 16.8% after 5 cycles at a modest regeneration temperature of only 60°C)

Method used

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  • Nano-structure supported solid regenerative polyamine and polyamine polyol absorbents for the separation of carbon dioxide from gas mixtures including the air
  • Nano-structure supported solid regenerative polyamine and polyamine polyol absorbents for the separation of carbon dioxide from gas mixtures including the air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0049] Example 1. Preparation of Loaded Amine Sorbent

[0050] This example illustrates that 50wt% polyethyleneimine and 50wt% have an average primary particle size of 7nm and 390m 2 / g+ / -40m 2 Preparation of supported amine sorbent composed of fumed silica with specific surface area / g.

[0051] 4 g of polyethyleneimine (molecular weight Mw of 25,000) was dissolved in 25 mL of methanol. This solution was then added dropwise to 4 g of fumed silica suspended in 100 mL of methanol with stirring to ensure good dispersion of polyethyleneimine on the support. The mixture was stirred for a further 1 hour, and then the solvent was removed from the mixture by heating under vacuum at 50 °C on a rotovap followed by overnight vacuum (<1 mmHg). The resulting supported amine sorbent was a white solid which was then crushed and sieved to obtain a homogeneous powder.

Embodiment II

[0052] Example II. Preparation of Supported Amine / Polyol Sorbent

[0053] This example illustrates that 45wt% polyethyleneimine, 10wt% polyethylene glycol and 45wt% have an average primary particle size of 7nm, 390m 2 / g+ / -40m 2 Preparation of supported amine / polyol sorbents composed of fumed silica with specific surface area / g.

[0054] Polyethylene glycol (molecular weight Mw of 400) 2 g was dissolved in 25 mL methanol. This solution was then added dropwise to 9 g of fumed silica suspended in 200 mL of methanol with stirring to ensure good dispersion of polyethylene glycol on the support. The mixture was then stirred for a further 1 hour. The solvent was then removed from the mixture by heating under vacuum at 50 °C on a rotary evaporator followed by overnight vacuum (<1 mmHg). The resulting polyol / carrier was a white powder which was crushed and sieved.

[0055] 5.5 g of the resulting polyol / carrier were mixed with 50 mL of methanol. To this mixture was added dropwise...

Embodiment III

[0056] Example III. Preparation of Supported Amine / Polyol Sorbent

[0057] The same procedure described in Example II was used to prepare a pyrolyzed compound consisting of 47.5 wt% polyethyleneimine (molecular weight Mw of 25,000), 10 wt% polyethylene glycol (molecular weight Mw of 400), and 42.5 wt% Sorbent composed of silica. The resulting polyol / amine supported sorbent was a white solid which was ground and sieved to produce a homogeneous powder. The powder has excellent flow properties.

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Abstract

The invention relates to regenerative, supported amine sorbents that includes an amine or an amine / polyol composition deposited on a nano-structured support such as nanosilica. The sorbent provides structural integrity, as well as high selectivity and increased capacity for efficiently capturing carbon dioxide from gas mixtures, including the air. The sorbent is regenerative, and can be used through multiple operations of absorption-desorption cycles.

Description

field of invention [0001] The present invention relates to nanostructure supported (eg fumed silica, alumina, etc. solid) regenerated polyamine-polyol absorbents for the capture and separation of carbon dioxide from gas mixtures including air. Background of the invention [0002] Climate change and global warming are considered to be among the most urgent and serious environmental problems of our time. It is now generally accepted that the main cause of global warming is the release of so-called greenhouse gases into the atmosphere. The main greenhouse gas is carbon dioxide (CO 2 ), which are mainly released by the combustion of fossil fuels such as coal, oil and natural gas. Together, these fossil fuels supply approximately 80% of the world's energy needs. Fossil fuels are expected to remain our primary source of energy for a long time because they are still relatively cheap and readily available, and because there are no satisfactory alternatives capable of replacing th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/32B01D53/62B01D53/02C07C29/149C25B3/04C01B32/50C25B3/25
CPCB01J20/3425B01J20/3491B01J20/3204B01J20/3021B01D2257/504Y02C10/08B01J20/103B01J20/28007B01J20/262Y02C10/06Y02C10/04B01J20/3272C07C29/04B01J20/3289B01J20/28061C07C41/09B01J20/3483B01J20/32B01D53/025C07C29/149B01D53/1475C07C1/20B82Y30/00B01J20/3251B01J20/3253Y02P20/50Y02C20/40C07C11/02C07C31/04C07C31/08C07C31/10C07C43/043B01J20/22B01J20/10B01J20/30B01D53/14Y02P20/151
Inventor G·A·奥拉A·戈珀特S·梅思G·K·S·普拉卡什
Owner UNIV OF SOUTHERN CALIFORNIA
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