Hydrophobic pillared square grids for selective removal of CO ₂ from simulated flue gas

Journal Article · Thu Jan 01 00:00:00 EST 2015 · ChemComm

DOI:https://doi.org/10.1039/c5cc06577a· OSTI ID:1267593

Elsaidi, Sameh K.; Mohamed, Mona H.; Schaef, Herbert T.; Kumar, Amrit; Lusi, Matteo; Pham, Tony; Forrest, Katherine A.; Space, Brian; Xu, Wenqian; Halder, Gregory J.; Liu, Jun; Zaworotko, Michael J.; Thallapally, Praveen K.

Capture of CO2 from flue gas or air is considered as feasible way to reduce the anthropogenic emission of CO2. Herein we reported the impact of metal substitution on tuning the physicochemical properties in isostructural family of metal organic materials (MOMs) based on pyrazine as organic linker, hexaflouro silicate as anionic pillar and Zn, Cu, Ni and Co as metal centres. Two new isostructural square grid networks namely SIFSIX-3-Ni and SIFSIX-Co are fully characterized and compared with the parent Zn(II) and Cu(II). Interestingly the new Ni(II) and Co (II) analogues higher loading capacity for CO2 at 0.15 bar and higher CO2/N2 selectivity at condition relevant to flue gas separation. Our data show that a small change in the structure could lead to dramatic enhancement in the physicochemical properties of MOMs.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1267593
• Report Number(s): PNNL-SA-109325; KC0203020
• Journal Information: ChemComm, Vol. 51, Issue 85; ISSN 1359-7345
• Publisher: Royal Society of Chemistry
• Country of Publication: United States
• Language: English