Microporous Coordination Polymers for Efficient Recovery of Chloromethane from Organic Silicon Industrial Exhaust Gas.

Removal and recovery of methyl chloride (CH 3 Cl) from exhaust gas of organic silicon industry is highly important from the perspective of environment and economy. For the first time, a tailor-made microporous coordination polymer ( Mn-BDC-TPA ) was synthesized and applied to the efficient capture and recovery of CH 3 Cl from related gas mixtures. The high adsorption capacity of CH 3 Cl (163.4 cm 3 /g) and high adsorption selectivity of CH 3 Cl over other impurity gases (1965 for N 2 , 65 for CH 4 , and 16 for C 2 H 6 ) were achieved at 298 K and 100 kPa due to the dual-cage pore system and larger polarizability of CH 3 Cl. Dynamic breakthrough experiments demonstrate the excellent CH 3 Cl recovery performance (capacity of >98 cm 3 /g and purity of >95%) in one adsorption-desorption cycle from the CH 3 Cl-involved binary, ternary, or quaternary gas mixture.