Metal Organic Framework/ Alumina Composite with Novel Geometry for - - PowerPoint PPT Presentation

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Metal Organic Framework/ Alumina Composite with Novel Geometry for - - PowerPoint PPT Presentation

Oct 15, 2022 107 likes •292 views

Metal Organic Framework/ Alumina Composite with Novel Geometry for Enhanced Adsorptive Separation Chenghong WANG (Chris) Supervisor: Prof. J. Paul Chen & Prof. Kang Li Joint NUS NGS Imperial College London PhD Programme

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Metal‐Organic Framework/α‐Alumina Composite with Novel Geometry for Enhanced Adsorptive Separation

‐‐‐ Chenghong WANG (Chris)

Supervisor: Prof. J. Paul Chen & Prof. Kang Li Joint NUS NGS‐Imperial College London PhD Programme September 2016

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  • Introduction on MOF/alumina composite
  • Adsorptive separation study

– Arsenic contaminated water remediation

  • Discussion & Future work

“Wang, C. et al., Chem. Commun., 2016, 52, 8869‐8872”

Overview

Introduction (materials) Performance Study Discussion

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  • Industrial process for the purification of liquid or gas mixtures.
  • Fixed & fluidized beds
  • Drawbacks including:

– 1) large pressure drop – 2) channelling of fluid – 3) break‐up of adsorbent pellets

  • Novel concept and design!

Adsorptive Separation

Introduction (materials) Performance Study Discussion

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  • Definition:

– “Inorganic metal ions or metal containing clusters” +“organic ligands”

  • Unique features of this porous material:

– large surface area & great porosity – customizable chemical functionalities – relatively mild synthesis conditions

  • Applications:

– adsorption, separation, sensing, catalysis, etc.

Metal Organic Framework (MOF)

Introduction (materials) Performance Study Discussion

Zr‐MOF UiO‐66: Zirconium oxide unit + BDC linker

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  • Hydro‐stable, even under acidic or some alkaline conditions
  • UiO‐66 for aquatic arsenic adsorption (Scientific Reports, 16613, 2015)

– Wide pH working range (1‐10) – Great thermodynamic capacity (303 mg/g) – Fast kinetic behaviour

  • To be industrially applied => Binder problem?

UiO‐66 Adsorbent

Introduction (materials) Performance Study Discussion

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α‐Alumina

Introduction (materials) Performance Study Discussion

  • Abundant supply in raw material & great resistance to various conditions
  • Hollow fibre structure with novel geometry as advanced matrix

– micro‐channels serving as reaction chamber – thin barrier layer serving as sieve

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MOF/α‐Alumina Composite

Introduction (materials) Performance Study Discussion

Vacuum filtration method Size‐exclusion effect

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MOF/α‐alumina Composite for Arsenic Contaminated Water Remediation

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Arsenic pollutant removal from water

  • Arsenic contamination is a global threat due to its toxicity and carcinogenicity
  • Arsenic concentration in most contaminated water ranges from 0.1 – 1 ppm.
  • 1 ppm as the feed concentration

Introduction (materials) Performance Study Discussion

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MOF/α‐alumina Composite for Arsenic Contaminated Water Remediation

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Introduction (materials) Performance Study Discussion

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Comparison Study by Packed Column Beds

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Introduction (materials) Performance Study Discussion

Inferior performance

  • Random packing & non‐ideal flow
  • Even worse when limited amount of adsorbent

were used

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MOF/α‐alumina Composite for Arsenic Contaminated Water Remediation

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Alternative concept for adsorptive separation

  • Micro‐channels

– adsorbent distribution – transport network (reduced mass transfer resistance) – more ideal flow

  • Barrier layer

– separation for suspended solids & micro‐organisms

  • Binder problem solved
  • Module assembled

Introduction (materials) Performance Study Discussion

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MOF/α‐alumina Composite for Arsenic Contaminated Water Remediation

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Alternative concept for adsorptive separation

  • Micro‐channels

– adsorbent distribution – transport network (reduced mass transfer resistance) – more ideal flow

  • Barrier layer

– separation for suspended solids & micro‐organisms

  • Binder problem solved
  • Module assembled

Introduction (materials) Performance Study Discussion

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Revisit Key Points

  • MOF/α‐alumina composite with novel geometry was developed for enhanced

adsorptive separation

  • The composite is able to produce potable water recovery from arsenic

contaminated water

  • To achieve a similar performance, the packed column bed required 8X amount of

active UiO‐66 adsorbents

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Introduction (materials) Performance Study Discussion

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  • More functional composites can be formed, based on the application

purpose and the functionality of adsorbents

  • Gas chromatography separation,
  • Catalytic reaction,
  • etc.

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Introduction (materials) Performance Study Discussion

Future Work

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References & Acknowledgement

  • Pictures used are adopted from Google Images without financial

purposes.

  • I. Ali, Chem Rev, 2012, 112, 5073.
  • H. Furukawa, K. E. Cordova, M. O'Keeffe and O. M. Yaghi, Science, 2013,

341, 1230444.

  • H. C. Zhou and S. Kitagawa, Chem Soc Rev, 2014, 43, 5415.
  • N. A. Khan, Z. Hasan and S. H. Jhung, J Hazard Mater, 2013, 244‐245, 444.
  • J. H. Cavka, S. Jakobsen, U. Olsbye, N. Guillou, C. Lamberti, S. Bordiga and
  • K. P. Lillerud, J Am Chem Soc, 2008, 130, 13850.
  • C. Wang, X. Liu, J. P. Chen and K. Li, Sci Rep, 2015, 5, 16613.
  • J. He, T. S. Siah and J. Paul Chen, Water Res., 2014, 56, 88.
  • M. Lee, B. Wang and K. Li, J. Membr. Sci., 2016, 503, 48.
  • X. Liu, N. K. Demir, Z. Wu and K. Li, J Am Chem Soc, 2015, 137, 6999.
  • J. He, T. Matsuura and J. P. Chen, J. Membr. Sci., 2014, 452, 433.
  • K. Li, Ceramic membranes for separation and reaction, Wiley, 2007.

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Introduction (materials) Performance Study Discussion

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Thanks for Listening !!

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