(668f) Gas Adsorption Properties of NH2-MIL-53(Al) Metal Organic Framework: Experimental and Modeling Insights | AIChE

(668f) Gas Adsorption Properties of NH2-MIL-53(Al) Metal Organic Framework: Experimental and Modeling Insights


Gumma, S. - Presenter, Indian Institute of Technology Tirupati
Baurai, M., Indian Institute Of Technology Guwahati
Medikonda, P., Indian Institute of Technology Guwahati
Mishra, P., Indian Institute of Technology Guwahati
Edubilli, S., Indian Institute of Technology Guwahati

Edubilli edubilli 2 31 2019-04-12T17:52:00Z 2019-04-12T17:52:00Z 1 343 1957 16 4 2296 15.00

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200%;font-family:" times new roman>Gas adsorption properties of NH2-MIL-53(Al)
metal organic framework: Experimental and modeling insights

line-height:normal"> font-family:" times new roman mso-bidi-theme-font:minor-bidi>Mudit font-family:" times new roman mso-bidi-theme-font:minor-bidi> Baurai, Prudhviraj Medikonda, Prashant
Mishra, Satyannarayana Edubilli, Sasidhar

of Chemical Engineering, Indian Institute of Technology Guwahati

- 781039, Assam, India.

line-height:normal">Corresponding author’s email:  font-family:" times new roman>s.gumma@iitg.ac.in (S. Gumma)

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During the past two decades, Metal
Organic frameworks (MOFs) 115%;font-family:" times new roman>has gained much research attention
in the field of gas adsorption/separation due to their fascinating
characteristics like high and selective adsorption capacity, tunable pore
structure and ease of post synthetic modification towards specific applications.

(Material Institut Lavoisier) series of MOFs were
extensively studied for gas separation applications. Among these materials,
MIL-53(Al), which exhibits structural transformation form lp (large pore) domain to np (narrow pore) domain and vice versa
(so-called breathing phenomenon) upon adsorption of certain guest molecules
(like CO2, CH4etc), by
changing temperature or by applying mechanical pressure was interesting and
studied by many researchers. The amine functionalized form of this MOF i.e. NH2-MIL-53(Al)
also shows a similar behavior. However, there are certain differences in the
nature such as after activation at room temperature MIL-53(Al) exhibits large
pore (lp)
form, whereas NH2-MIL-53(Al) show a very narrow pore (vnp) form due to
the hydrogen bonding between NH2 group, oxygen atoms and OH group of
the framework. Interestingly, higher value of CO2 capacity and
selectivity are reported on NH2-MIL-53(Al) for sub-atmospheric
pressure. However, to the best of our knowledge, a detailed adsorption study
including several adsorbates (covering a wide range of polarity and polarizability), high pressure and multiple temperatures
seems to be unavailable in the literature. Hence, in this work, we measured pure
gas adsorption properties of CO2, CH4, N2 and
CO on NH2-MIL-53(Al) at three different temperatures viz. 293, 318 and 354 K over a pressure
ranging 0 ─ 100 bar. In addition, attempts are made to relate the
physical properties of gases with the structural transformation of NH2-MIL-53(Al).

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Metal organic frameworks (MOFs), flexible MOFs, Gas separation