Multi component adsorption breakthrough curve analyzer assists Professor Su Chengyong's team at CUHK in their new achievement "JACS": Zr MOF can be synthesized in large quantities and purified for deep flue gas desulfurization and SO2 recovery

Deep removal and recyclingSO2As an industrial raw material, it has significant importance in flue gas desulfurization and natural gas purification, but developing low-cost, scalable, efficient, and recyclable physical adsorbents remains a challenge.

Here, Professor Su Chengyong's research group from Sun Yat sen UniversityIn《JACS》Published onoftitled as“Scalable and Depurative Zirconium Metal−Organic Framework for Deep Flue-Gas Desulfurization and SO2 Recovery”The paper reports a feasible synthesis scheme for productionDUT-67That shouldDUT-67Having controllableMOFStructure, excellent crystallinity, adjustable shape/Size, milligrams to kilograms scale, and solvent recovery/Continuous production of regulators. In addition, simpleHClThe post-processing has been purifiedDUT-67-HClIt has ultra-high purity, excellent chemical stability, and reversible propertiesSO2Absorption and high separation selectivity（SO2/CO2andSO2/N2）Greatly enhancedSO2Capture capability and good reusability. in situXX-ray diffraction/Infrared spectroscopy andDFT/GCMCThe calculation explainsSO2The combination mechanism. Containing trace amountsSO2The True Four YuanN2/CO2/O2/SO2A step carried out in flue gasSO2Separation can be achieved through drying and50%Under humid conditions for recycling96%The purity. This work may have implications for the futureSO2Capture and recycling technology paves the way, driving progressMOFSynthesis is developing towards economic cost, expanding production, and improving physical and chemical properties.

Synthesis and crystal structure.

（a）Original for different purposes-DUT-67Synthesis conditions and preparationDUT-67-HClPost processing. The illustration shows the shape of the sample and the magnification facility.

（b）InDUT-67-HClDisplay in the middle8One endOH⁻/H2OThe functional groupZr6Cluster.

（c）DUT-67-HClThe octahedral cage in.

（d）DUT-67-HClThe cubic octahedral cage in.

(d) The water absorption isotherms of DUT-67 and DUT-67 HCl at 298K.

(e) Repeat water absorption using DUT-67-HCl.

(f) N2 adsorption isotherms at 77K and pore size distributions of DUT-67 and DUT-67 HCl.

Gas adsorption performance.

(a, b) Adsorption isotherms of SO2, CO2, N2, and O2 with DUT-67 and DUT-67 HCl at 273 and 298K.

(c) Comparison of the adsorption and separation performance of Zr MOFs for SO2 reported.

(d) Qst for absorbing SO2 and CO2 in DUT-67 and DUT-67 HCl.

(e, f) IAST selectivity for SO2/CO2 and SO2/N2 of DUT-67 and DUT-67 HCl at 298K.

Simulated smoke column penetration test.

(a, b) Separate the N2/CO2/O2/SO2 (81.8:15:3:0.2) mixture using DUT-67 and DUT-67 HCl.

(c, d) Separate flue gas using DUT-67 and DUT-67 HCl at different temperatures.

(e) Circulating column penetration test of DUT-67-HCl.

(f, g) Separate flue gas using DUT-67 and DUT-67 HCl under dry and humid conditions.

(h, i) SO2 desorption curves of DUT-67 and DUT-67 HCl.

All data were collected at 298K unless temperature was indicated