scholarly journals Selective Capture of Carbon Dioxide from Hydrocarbons Using a Metal-Organic Framework: Relevance to the Purification of Natural Gas and Acetylene

2020 ◽  
Author(s):  
Omid Taheri Qazvini ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Noncovalent Interactions ◽  
Metal Organic Framework ◽  
Time Lags ◽  
Guest Molecules ◽  
X Ray Crystallography ◽  
Metal Organic ◽  
Short Time ◽  
Organic Framework

<p>Efficient and sustainable methods for carbon dioxide (CO<sub>2</sub>) capture are highly sought after. Mature technologies involve chemical reactions that absorb CO<sub>2, </sub>but they have many drawbacks. Energy-efficient alternatives may be realized by porous physisorbents with void spaces that are complementary in size and electrostatic potential to molecular CO<sub>2</sub>. Here, we present a robust, recyclable and inexpensive adsorbent termed MUF-16 (MUF = Massey University Framework). This metal-organic framework captures CO<sub>2</sub> with a high affinity in its one-dimensional channels. The position of the CO<sub>2</sub> molecules sequestered in the framework pores, as determined by X-ray crystallography, illustrate how complementary noncovalent interactions envelop the CO<sub>2</sub> while repelling other guest molecules. The low affinity of the MUF-16 pores for these competing gases underpins new benchmarks for the adsorption of CO<sub>2</sub> over methane, acetylene, ethylene, ethane, propylene and propane. IAST calculations show that for 50/50 mixtures at 293 K and 1 bar, the CO<sub>2</sub>/CH<sub>4</sub> selectivity is 6690 and the CO<sub>2</sub>/C<sub>2</sub>H<sub>2</sub> selectivity is 510, for example. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver high-purity hydrocarbon products. Ultimately, MUF-16 may be applicable to the removal of CO<sub>2 </sub>from sources such as natural gas and chemical feedstocks.<br></p>

scholarly journals Selective Capture of Carbon Dioxide from Hydrocarbons Using a Metal-Organic Framework: Relevance to the Purification of Natural Gas and Acetylene

2020 ◽  
Author(s):  
Omid Taheri Qazvini ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Noncovalent Interactions ◽  
Metal Organic Framework ◽  
Time Lags ◽  
Guest Molecules ◽  
X Ray Crystallography ◽  
Metal Organic ◽  
Short Time ◽  
Organic Framework

<p>Efficient and sustainable methods for carbon dioxide (CO<sub>2</sub>) capture are highly sought after. Mature technologies involve chemical reactions that absorb CO<sub>2, </sub>but they have many drawbacks. Energy-efficient alternatives may be realized by porous physisorbents with void spaces that are complementary in size and electrostatic potential to molecular CO<sub>2</sub>. Here, we present a robust, recyclable and inexpensive adsorbent termed MUF-16 (MUF = Massey University Framework). This metal-organic framework captures CO<sub>2</sub> with a high affinity in its one-dimensional channels. The position of the CO<sub>2</sub> molecules sequestered in the framework pores, as determined by X-ray crystallography, illustrate how complementary noncovalent interactions envelop the CO<sub>2</sub> while repelling other guest molecules. The low affinity of the MUF-16 pores for these competing gases underpins new benchmarks for the adsorption of CO<sub>2</sub> over methane, acetylene, ethylene, ethane, propylene and propane. IAST calculations show that for 50/50 mixtures at 293 K and 1 bar, the CO<sub>2</sub>/CH<sub>4</sub> selectivity is 6690 and the CO<sub>2</sub>/C<sub>2</sub>H<sub>2</sub> selectivity is 510, for example. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver high-purity hydrocarbon products. Ultimately, MUF-16 may be applicable to the removal of CO<sub>2 </sub>from sources such as natural gas and chemical feedstocks.<br></p>

scholarly journals Selective capture of carbon dioxide from hydrocarbons using a metal-organic framework

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Omid T. Qazvini ◽  
Ravichandar Babarao ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Density Functional ◽  
Metal Organic Framework ◽  
Density Functional Theory Calculations ◽  
Time Lags ◽  
X Ray Crystallography ◽  
Metal Organic ◽  
Adsorption Of Co ◽  
Short Time ◽  
Organic Framework

AbstractEfficient and sustainable methods for carbon dioxide capture are highly sought after. Mature technologies involve chemical reactions that absorb CO2, but they have many drawbacks. Energy-efficient alternatives may be realised by porous physisorbents with void spaces that are complementary in size and electrostatic potential to molecular CO2. Here, we present a robust, recyclable and inexpensive adsorbent termed MUF-16. This metal-organic framework captures CO2 with a high affinity in its one-dimensional channels, as determined by adsorption isotherms, X-ray crystallography and density-functional theory calculations. Its low affinity for other competing gases delivers high selectivity for the adsorption of CO2 over methane, acetylene, ethylene, ethane, propylene and propane. For equimolar mixtures of CO2/CH4 and CO2/C2H2, the selectivity is 6690 and 510, respectively. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver high-purity hydrocarbon products, including pure methane and acetylene.

scholarly journals A Universal Porous Adsorbent for the Selective Capture of Carbon Dioxide

2019 ◽  
Author(s):  
Omid Taheri Qazvini ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Porous Materials ◽  
Noncovalent Interactions ◽  
Metal Organic Framework ◽  
Time Lags ◽  
Guest Molecules ◽  
Energy Penalty ◽  
Carbon Dioxide Co2 ◽  
Short Time

<div>Efficient and sustainable methods for carbon dioxide (CO2) capture are essential. Its atmospheric</div><div>concentration must be reduced to meet climate change targets, and its remediation from chemical</div><div>feedstocks and natural gas is vital. While mature technologies involving chemical reactions that trap the</div><div>CO2 do exist, they have many drawbacks. Porous materials with void spaces that are complementary in</div><div>size and electrostatic potential to CO2 offer an alternative. In these materials, the molecular CO2 guests</div><div>are trapped by noncovalent interactions, hence they can be recycled by releasing the CO2 with a low</div><div>energy penalty. Porous materials that are selective towards CO2 when it is present with an array of</div><div>competing gases are challenging to produce. Here, we show how a metal-organic framework, termed</div><div>MUF-16 (MUF = Massey University Framework), is a ‘universal’ adsorbent for CO2 that sequesters</div><div>CO2 from a broad palette of gas streams with record selectivities over competing gases. The position of</div><div>the CO2 molecules captured in the framework pores was determined crystallographically to illustrate</div><div>how complementary noncovalent interactions envelop the guest molecules. The pore environment has a</div><div>low affinity for all other gases, which underpins the benchmark selectivity of MUF-16 for CO2 over</div><div>methane, hydrogen and acetylene. Breakthrough gas separations under dynamic conditions benefit from</div><div>short time lags in the elution of the weakly-adsorbed component to deliver a repertoire of high-purity</div><div>products. MUF-16 is an inexpensive, robust, easily regernarable and recyclable adsorbent that is</div><div>universally applicable to the removal of CO2 from sources such as natural gas, syngas and chemical</div><div>feedstocks.</div>

scholarly journals A Universal Porous Adsorbent for the Selective Capture of Carbon Dioxide

2019 ◽  
Author(s):  
Omid Taheri Qazvini ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Noncovalent Interactions ◽  
Metal Organic Framework ◽  
Time Lags ◽  
Atmospheric Concentration ◽  
Guest Molecules ◽  
Gas Streams ◽  
Energy Penalty ◽  
Metal Organic ◽  
Short Time

<p>Efficient and sustainable methods for carbon dioxide (CO<sub>2</sub>) capture are essential. Its atmospheric concentration must be reduced to meet climate change targets, and its removal from sources such as chemical feedstocks is vital. While mature technologies involving chemical reactions that absorb CO<sub>2</sub> exist, they have many drawbacks. Porous materials with void spaces that are complementary in size and electrostatic potential to CO<sub>2</sub> offer an alternative. In these materials, the molecular CO<sub>2 </sub>guests are trapped by noncovalent interactions, hence they can be recycled by releasing the CO<sub>2</sub> with a low energy penalty. Capacity and selectivity are the twin challenges for such porous adsorbents. Here, we show how a metal-organic framework, termed MUF-16 (MUF = Massey University Framework), is a universal adsorbent for CO<sub>2</sub> that sequesters large quantities of CO<sub>2</sub> from a broad palette of gas streams with record selectivities over competing gases. The crystallographically-determined position of the CO<sub>2</sub> molecules captured in the framework pores illustrate how complementary noncovalent interactions envelop CO<sub>2</sub> while repelling other guest molecules. The low affinity of the pore environment for other gases underpins the strikingly high selectivity of MUF-16 for CO<sub>2</sub> over methane, nitrogen, hydrogen, acetylene, ethylene, ethane, propylene and propane. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver a repertoire of high-purity products. MUF-16 is an inexpensive, robust, recyclable adsorbent that is universally applicable to the removal of CO<sub>2 </sub>from sources such as natural gas, syngas, flue gas and chemical feedstocks.</p><br>

scholarly journals A Universal Porous Adsorbent for the Selective Capture of Carbon Dioxide

2019 ◽  
Author(s):  
Omid Taheri Qazvini ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Noncovalent Interactions ◽  
Metal Organic Framework ◽  
Time Lags ◽  
Atmospheric Concentration ◽  
Guest Molecules ◽  
Gas Streams ◽  
Energy Penalty ◽  
Metal Organic ◽  
Short Time

<p>Efficient and sustainable methods for carbon dioxide (CO<sub>2</sub>) capture are essential. Its atmospheric concentration must be reduced to meet climate change targets, and its removal from sources such as chemical feedstocks is vital. While mature technologies involving chemical reactions that absorb CO<sub>2</sub> exist, they have many drawbacks. Porous materials with void spaces that are complementary in size and electrostatic potential to CO<sub>2</sub> offer an alternative. In these materials, the molecular CO<sub>2 </sub>guests are trapped by noncovalent interactions, hence they can be recycled by releasing the CO<sub>2</sub> with a low energy penalty. Capacity and selectivity are the twin challenges for such porous adsorbents. Here, we show how a metal-organic framework, termed MUF-16 (MUF = Massey University Framework), is a universal adsorbent for CO<sub>2</sub> that sequesters large quantities of CO<sub>2</sub> from a broad palette of gas streams with record selectivities over competing gases. The crystallographically-determined position of the CO<sub>2</sub> molecules captured in the framework pores illustrate how complementary noncovalent interactions envelop CO<sub>2</sub> while repelling other guest molecules. The low affinity of the pore environment for other gases underpins the strikingly high selectivity of MUF-16 for CO<sub>2</sub> over methane, nitrogen, hydrogen, acetylene, ethylene, ethane, propylene and propane. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver a repertoire of high-purity products. MUF-16 is an inexpensive, robust, recyclable adsorbent that is universally applicable to the removal of CO<sub>2 </sub>from sources such as natural gas, syngas, flue gas and chemical feedstocks.</p><br>

scholarly journals A Universal Porous Adsorbent for the Selective Capture of Carbon Dioxide

2020 ◽  
Author(s):  
Omid Taheri Qazvini ◽  
Shane G. Telfer
Keyword(s):  
Carbon Dioxide ◽  
Noncovalent Interactions ◽  
Metal Organic Framework ◽  
Time Lags ◽  
Atmospheric Concentration ◽  
Guest Molecules ◽  
Gas Streams ◽  
Energy Penalty ◽  
Metal Organic ◽  
Short Time

<p>Efficient and sustainable methods for carbon dioxide (CO<sub>2</sub>) capture are essential. Its atmospheric concentration must be reduced to meet climate change targets, and its removal from sources such as chemical feedstocks is vital. While mature technologies involving chemical reactions that absorb CO<sub>2</sub> exist, they have many drawbacks. Porous materials with void spaces that are complementary in size and electrostatic potential to CO<sub>2</sub> offer an alternative. In these materials, the molecular CO<sub>2 </sub>guests are trapped by noncovalent interactions, hence they can be recycled by releasing the CO<sub>2</sub> with a low energy penalty. Capacity and selectivity are the twin challenges for such porous adsorbents. Here, we show how a metal-organic framework, termed MUF-16 (MUF = Massey University Framework), is a universal adsorbent for CO<sub>2</sub> that sequesters large quantities of CO<sub>2</sub> from a broad palette of gas streams with record selectivities over competing gases. The crystallographically-determined position of the CO<sub>2</sub> molecules captured in the framework pores illustrate how complementary noncovalent interactions envelop CO<sub>2</sub> while repelling other guest molecules. The low affinity of the pore environment for other gases underpins the strikingly high selectivity of MUF-16 for CO<sub>2</sub> over methane, nitrogen, hydrogen, acetylene, ethylene, ethane, propylene and propane. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver a repertoire of high-purity products. MUF-16 is an inexpensive, robust, recyclable adsorbent that is universally applicable to the removal of CO<sub>2 </sub>from sources such as natural gas, syngas, flue gas and chemical feedstocks.</p><br>

Synthesis and Structure of a Clathrated Two-Dimensional Metal-Organic Framework: [Cd(4,4'-bpy)2(H2O)2](ClO4)2·(L)2·H2O (L = Bis(1-pyrazinylethylidene)hydrazine)

2008 ◽  
Vol 73 (1) ◽  
pp. 24-31
Author(s):  
Dayu Wu ◽  
Genhua Wu ◽  
Wei Huang ◽  
Zhuqing Wang
Keyword(s):  
Metal Organic Framework ◽  
Channel Structure ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Guest Molecules ◽  
X Ray ◽  
Square Planar ◽  
Metal Organic ◽  
Aqueous Meoh ◽  
Organic Framework

The compound [Cd(4,4'-bpy)2(H2O)2](ClO4)2·(L)2 was obtained by the reaction of Cd(ClO4)2, bis(1-pyrazinylethylidene)hydrazine (L) and 4,4'-bipyridine in aqueous MeOH. Single-crystal X-ray diffraction has revealed its two-dimensional metal-organic framework. The 2-D layers superpose on each other, giving a channel structure. The square planar grids consist of two pairs of shared edges with Cd(II) ion and a 4,4'-bipyridine molecule each vertex and side, respectively. The square cavity has a dimension of 11.817 × 11.781 Å. Two guest molecules of bis(1-pyrazinylethylidene)hydrazine are clathrated in every hydrophobic host cavity, being further stabilized by π-π stacking and hydrogen bonding. The results suggest that the hydrazine molecules present in the network serve as structure-directing templates in the formation of crystal structures.

scholarly journals A Cofacial Metal-Organic Framework Based Photocathode for Carbon Dioxide Reduction

2021 ◽  
Author(s):  
Bowen Ding ◽  
Bun Chan ◽  
Nicholas Proschogo ◽  
Marcello Solomon ◽  
Cameron Kepert ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Energy Harvesting ◽  
Solar Energy ◽  
Metal Organic Framework ◽  
Carbon Dioxide Reduction ◽  
Solar Energy Harvesting ◽  
Metal Organic ◽  
Organic Framework

Innovative and robust photosensitisation materials play a cardinal role in advancing the combined effort towards efficient solar energy harvesting. Here, we demonstrate the photocathode functionality of a Metal-Organic Framework (MOF)...

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