SSZ-13Molecular Sieve Membrane

Conventional CO₂ capture from petrochemical furnace flue gas is energy intensive, and impurity components place strict demands on membrane stability. This program developed CHA zeolite-membrane post-combustion carbon capture and enrichment technology.

CHA membrane CO₂/N₂ performance evaluation achieved CO₂ permeance ≥2,000 GPU and CO₂/N₂ selectivity ≥20. High packing-density modules were developed with optimized sealing and internal geometry, and the effects of particulates, NOx, and SOx on membrane performance were examined. A small-scale flue-gas carbon-capture unit reached CO₂ capture concentrations above 80%, with multi-condition long-term stability testing completed.

Membrane–process–equipment integration and a capture-efficiency calculation model produced a complete flue-gas carbon-enrichment technology package and full test reports for a new membrane pathway in refining flue-gas carbon capture.

Conventional carbon capture for coal-fired power-plant flue gas faces high energy use and capital intensity, while complex flue-gas conditions demand dense membrane layers and impurity tolerance. This program developed CHA zeolite membranes and process technology for flue-gas CO₂ capture.

Nanoscale CHA seed preparation and ultrasound-assisted deposition were optimized to control crystal growth and produce ultrathin dense separation membranes. Systematic material characterization and capture tests under simulated and real flue-gas conditions clarified how process conditions affect CO₂ separation.

A full experimental research report and membrane-preparation scheme for flue-gas capture were delivered, with paper and patent outputs supporting subsequent engineering application of membrane-based low-carbon capture.

Natural-gas feeds often contain large amounts of CO₂, and conventional chemical treating consumes reagents and energy. This program developed CHA zeolite-membrane technology for natural-gas CO₂ removal.

50 cm pilot membrane tubes achieved CO₂ permeance ≥2,500 GPU and CO₂/CH₄ selectivity ≥35 in CO₂/CH₄ mixtures. A pilot system treated up to 1.0 Nm³/h of natural gas with CO₂ removal ≥95%. Overall energy use was more than 40% lower than conventional chemical decarbonization.

Lab-to-pilot validation, multi-condition testing, and iterative membrane/module optimization produced complete process data supporting a natural-gas decarbonization process package and green membrane treating solutions.

Lithium–air batteries use ambient oxygen as the cathode active species, but CO₂ in air triggers side reactions that cut capacity and cycle life. This program developed CO₂ separation membranes and adsorption materials suited to lithium–air batteries.

Effects of CO₂ concentration on electrochemical performance were quantified. Modified adsorption and membrane materials delivered CO₂/N₂ selectivity above 20 and CO₂ permeance above 1,000 GPU at room temperature and low pressure differential, reducing inlet CO₂ below 100 ppm after separation. Coupled with the battery, overall performance reached about 70% of pure-oxygen conditions, with capacity retention above 70% over 10 charge–discharge cycles.

Material modification, separation testing, and battery integration produced full reports plus patent and paper outputs for air-duty lithium–air battery practicalization.

Amine-based carbon capture is reagent intensive, energy intensive, and environmentally burdensome. This program developed stepped membrane carbon capture and hydrocarbon concentration technology for high-CO₂ CO₂/hydrocarbon feeds.

Segmented modules for high concentration ratios were developed with intensified turbulence to cut concentration polarization. Phase I at 10 L(STP)/min achieved 10× hydrocarbon concentration, C1–C2 recovery ≥90%, C3+ recovery ≥95%, and permeate CO₂ ≥98.5%, with 200-hour stability testing. Phase II targeted a 1,000 L(STP)/min skidded modular unit with product-gas CO₂ within 3% and permeate CO₂ ≥98%, plus 500-hour long-term testing.

Capture energy use fell by more than 30% versus conventional routes. Control-system development and economic assessment delivered a complete dataset for membrane equipment solutions in hydrocarbon–CO₂ capture.

Refinery dry gas and field natural gas contain nitrogen, CO₂ and other non-hydrocarbon impurities; conventional separation is energy intensive and limits hydrocarbon recovery. This program developed packaged zeolite-membrane gas-separation technology for refinery dry gas and natural gas.

High packing-density, high mass-transfer inorganic microporous membranes and modules were developed with optimized internal flow fields to suppress concentration polarization. For refinery dry gas, hydrocarbon purity ≥95% with hydrocarbon loss ≤10% was achieved; for natural gas, methane purity ≥95% with methane loss ≤10%, and overall energy use more than 20% lower than conventional routes. Process simulation, equipment development, and field pilot testing were completed.

Two membrane process packages for dry gas and natural gas, key equipment development, patent planning, and full research reports support low-energy gas purification and recovery in the oil and gas industry.