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Sun, Lei,Hendon, Christopher H.,Minier, Mikael A.,Walsh, Aron,Dincă,, Mircea American Chemical Society 2015 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.137 No.19
<P/><P>Reaction of FeCl<SUB>2</SUB> and H<SUB>4</SUB>DSBDC (2,5-disulfhydrylbenzene-1,4-dicarboxylic acid) leads to the formation of Fe<SUB>2</SUB>(D<B>S</B>BDC), an analogue of M<SUB>2</SUB>(D<B>O</B>BDC) (MOF-74, DOBDC<SUP>4–</SUP> = 2,5-dihydroxybenzene-1,4-dicarboxylate). The bulk electrical conductivity values of both Fe<SUB>2</SUB>(D<B>S</B>BDC) and Fe<SUB>2</SUB>(D<B>O</B>BDC) are ∼6 orders of magnitude higher than those of the Mn<SUP>2+</SUP> analogues, Mn<SUB>2</SUB>(DEBDC) (E = O, S). Because the metals are of the same formal oxidation state, the increase in conductivity is attributed to the loosely bound Fe<SUP>2+</SUP> β-spin electron. These results provide important insight for the rational design of conductive metal–organic frameworks, highlighting in particular the advantages of iron for synthesizing such materials.</P>
Rem Jalab,Abdelrahman Mohammed Awad,Mustafa Saleh Nasser,Ibnelwaleed Ali Hussein,Fares Almomani,Joel Minier-Matar,Samer Adham 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.1
The current study applied the forward osmosis (FO) based osmotic concentration (OC) process at the pilot-scale for concentrating synthetic feed solution (FS). The process water (PW) salinity represents effluents from the gas industry, while the draw solution (DS) mimics seawater. Besides, the performance of a hollow fiber (HF) membrane manufactured from polyamide thin film composite (PA-TFC) was evaluated. The effect of operation with various feed recovery rates, flowrates and temperatures on the OC performance was examined. Outcomes reveal that the tested membrane succeeded in recovering up to 90% of FS at water flux of 6.40 LMH. The stability of OC plant was successfully demonstrated for 48 hours long-term run at 75% feed recovery as an optimum condition, where the TFC membrane achieved average water flux of 6.00 LMH, respectively. Higher DS flowrate improved the OC performance by inducing higher water permeation and FS recovery; however, it increased the undesirable reverse solute diffusion. Lastly, the permeability coefficient of the HF membrane was estimated by 2.69LMH/bar at 25 oC, which significantly enhanced at higher temperatures.