Metal organic frameworks appended with cyclic diamines for carbon dioxide capture

An organic framework and organic technology, applied in the direction of magnesium organic compounds, other chemical processes, chemical instruments and methods, etc., can solve problems such as interference adsorption/desorption kinetics adsorption mechanism, diamine loss, degradation, etc.

Active Publication Date: 2020-05-01
RGT UNIV OF CALIFORNIA +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, one problem associated with materials functionalized after synthesis is that Mg 2+ loss of diamine at the center, which will lead to gradual degradation of the adsorbent
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  • Metal organic frameworks appended with cyclic diamines for carbon dioxide capture
  • Metal organic frameworks appended with cyclic diamines for carbon dioxide capture
  • Metal organic frameworks appended with cyclic diamines for carbon dioxide capture

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[0030] I. Introduction

[0031] Attachment of the diamine 2-(aminomethyl)piperidine (2-ampd) to metal-organic frameworks Mg 2 (dobpdc)(dobpdc 4- =4,4'-biphenyldioxide-3,3'-diformate), Mg 2 (dotpdc)(dotpdc 4- = 4,4"-dioxide-[1,1':4',1"-terphenyl]-3,3"-diformate) or Mg 2 (pc-dobpdc)(pc-dobpdc 4- = open Mg of biphenyl dioxide-4,4'-dicarboxylate) 2+ sites, yielding promising sorbents EMM-44, EMM-45, and EMM-46, respectively, for capturing CO from flue emissions from natural gas-fired power plants 2 ( figure 1 ). The sorbent has a number of properties that make it promising for capturing carbon from natural gas-fired power plants.

[0032] Before the present invention is described in greater detail, it is to be understood that this invention is not limited to particular embodiments described herein, as such embodiments may vary. It is also to be understood that terminology used herein is for the purpose of describing particular embodiments only and that terminology is not...

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Abstract

Achieving the selective and reversible adsorption of CO2 from humid, low partial pressures streams such as the flue gas resulting from the combustion of natural gas in combined cycle power plants (4%CO2) is challenging due to the need for high thermal, oxidative, and hydrolytic stability as well as moderate regeneration conditions to reduce the energy of adsorption/desorption cycling. Appending cyclic primary, secondary diamines, exemplified by 2-(aminomethyl)piperidine (2-ampd), to the metal-organic frameworks Mg2(dobpdc) (dobpdc4- = 4,4-dioxidobiphenyl-3,3-dicarboxylate), Mg2(dotpdc) (dotpdc4- = 4,4''-dioxido-[1,1':4',1''-terphenyl]-3,3''-dicarboxylate) or Mg2(pc-dobpdc) (pc-dobpdc4- = dioxidobiphenyl-4,4'-dicarboxylate) produces adsorbents of the classes EMM-44, EMM-45, and EMM-46, respectively, that display step-shaped adsorption of CO2 at the partial pressures required for 90% capture from natural gas flue gas at temperatures up to or exceeding 60 DEG C. Using a cyclic diamine inplace of a diamine functionalized with bulky alkyl groups enables fast adsorption/desorption kinetics with sharp CO2 adsorption and desorption steps.

Description

[0001] Cross References to Related Applications [0002] This application calls for an application filed on August 4, 2017 titled "For CO 2 Trapped Metal-Organic Frameworks Appended with Cyclic Diamines for CO 2 Capture), which is incorporated herein by reference. technical field [0003] This application relates to the ability to efficiently capture CO at low partial pressure 2 And at the same time, an adsorbent regenerated at moderate temperature with low regeneration energy for carbon capture applications. Background technique [0004] Carbon dioxide (CO2) from burning fossil fuels in thermal power plants 2 ) may be the main contributor to global climate change. See Pachauri and Meyer, Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, International Government Panel on Climate Change, Geneva, Switzerland, 2014. To address the increasing CO in the atmosph...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01D53/04
CPCB01D53/02B01D53/04B01D2253/204B01D2253/306B01D2258/0283B01D2257/504B01J20/226Y02C20/40B01D53/1475B01D53/0462B01D53/047B01D2252/20436C07F3/02
Inventor J·R·龙S·C·威斯顿P·J·米尔纳R·L·西格曼
Owner RGT UNIV OF CALIFORNIA
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