Three-way rod metal-organic frameworks for purifying of C2—C3 from natural gas
Three-way rod metal-organic framework—3W-ROD-1 was prepared by solvothermal method using In(NO3)3·4H2O and H3L,with nitric acid serving as the template.This material possessed a permanent pore structure and exhibited a relatively high specific surface area,reaching up to 2742m2/g,along with a pore volume of 1.11cm3/g.Owing to its unique structural characteristics,the adsorption capacity of 3W-ROD-1 for propane,ethane,and methane were 8.74mmol/g,3.62mmol/g,and 0.44mmol/g,respectively.Notably,the adsorption capacity of propane ranked at the forefront among similar materials.Through IAST(ideal adsorption solution theory)selective calculation,the adsorption selectivities of C3H8/CH4,C2H6/CH4 at 298K and 1bar were calculated to be 87.0(C3H8∶CH4=15∶85)and 9.5(C2H6∶CH4=15∶85),respectively.Dynamic breakthrough separation experiments further verified its excellent separation performance for the propane/methane,ethane/methane,and propane/ethane/methane mixed systems.In the three components separation of propane/ethane/methane(V/V/V=5/10/85),the breakthrough times were 50min,11.5min and 3min,respectively.These findings convincingly demonstrated the potential application value of this material in the field of natural gas purification.
rod metal-organic frameworknatural gasseparationmethane
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