A regenerable oxide-based H 2 S adsorbent with nanofibrous morphology

Mayank Behl, Junghoon Yeom, Quentin Lineberry, Prashant Jain, Mark A. Shannon

Research output: Contribution to journalArticle

Abstract

Hydrogen sulphide is found in raw fuels such as natural gas and coal/biomass-derived syngas. It is poisonous to catalysts and corrosive to metals and therefore needs to be removed. This is often achieved using metal oxides as reactive adsorbents, but metal oxides perform poorly when subjected to repeated cycles of sulphidation and re-oxidation1-12 as a result of complex structural and chemical changes. Here, we show that Zn-Ti-O-based adsorbents with nanofibrous morphology can sustain their initial reactivity and sulphur removal capacity over multiple regeneration cycles. These nanostructured sorbents offer rapid reaction rates that overcome the gas-transport limitations of conventional pellet-based sorbents1,13 and allow all of the material to be used efficiently. Regeneration can be carried out at the same temperature as the sulphidation step because of the higher reactivity, which prevents sorbent deterioration and reduces energy use. The efficient regeneration of the adsorbent is also aided by structural features such as the growth of hierarchical nanostructures and preferential stabilization of a wurtzite phase in the sulphidation product.

Original languageEnglish (US)
Pages (from-to)810-815
Number of pages6
JournalNature Nanotechnology
Volume7
Issue number12
DOIs
StatePublished - Dec 2012

Fingerprint

adsorbents
regeneration
Adsorbents
Oxides
sorbents
Metals
Sorbents
Hydrogen
metal oxides
oxides
reactivity
gas transport
Caustics
Hydrogen Sulfide
cycles
hydrogen sulfide
synthesis gas
Coal
natural gas
Hydrogen sulfide

ASJC Scopus subject areas

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

A regenerable oxide-based H 2 S adsorbent with nanofibrous morphology. / Behl, Mayank; Yeom, Junghoon; Lineberry, Quentin; Jain, Prashant; Shannon, Mark A.

In: Nature Nanotechnology, Vol. 7, No. 12, 12.2012, p. 810-815.

Research output: Contribution to journalArticle

Behl, Mayank ; Yeom, Junghoon ; Lineberry, Quentin ; Jain, Prashant ; Shannon, Mark A. / A regenerable oxide-based H 2 S adsorbent with nanofibrous morphology. In: Nature Nanotechnology. 2012 ; Vol. 7, No. 12. pp. 810-815.
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