"Industrial separation processes constitute 10-15 % of the worldwide energy demand, due to the predominant utilization of thermal separation methods such as distillation."

Sholl & Lively, Nature, 2016


  • MMML is interested in developing new generations of the separation devices that will enable chemical engineers to debottleneck current thermally-driven chemical processes

  • Molecularly-selective multidimensional materials

    • 0D cages, cluster, and polyhedra

    • 1D nanofibers and tubes

    • 2D nanosheets with various nanoporosity

    • 3D flexible nanoporous frameworks 

    • will be extensively utilized in the multilayer hollow fiber platform.

  • The multilayer hollow fiber platform benefits from extremely large surface area provided per unit volume of membrane separation device (surpassing 5,000 m2/m3) and diverse functionalities derived from tunable layers.

  • Separation scopes within MMML’s research program include hydrocarbon separations, natural gas separations, acid/sour gas removal, organic solvent separations, and water purifications.

MMML is developing

"Multilayer Hollow Fiber Systems with Tunable Layers"

  • OD = 200 - 800 microns

  • ID = 100 - 300 microns

  • Production = up to 50  m/min

  • High Sorbent Loading is Possible

Multilayer Hollow Fiber

SEM cross-section image


  • Membranes

  • Structured Sorbents

  • Catalytic Membrane Reactor

  • Composite System

  • Flexible Fabrics

  • Sensors

"How it works" Hollow Fibers

Fabricated by

"Dry-Jet Wet-Quench Fiber Spinning Process"

"Challenges and Opportunities"

1. Multiscale Separations Approach

2. Molecularly-Selective Materials for Advanced Molecular Resolution