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Metal loaded zeolite adsorbents for hydrogen cyanide removal.

Metal loaded zeolite adsorbents for hydrogen cyanide removal.

Journal of environmental sciences (China) (2013-08-09)

Ping Ning, Juan Qiu, Xueqian Wang, Wei Liu, Wei Chen

ABSTRACT

Metal (Cu, Co, or Zn) loaded ZSM-5 and Y zeolite adsorbents were prepared for the adsorption of hydrogen cyanide (HCN) toxic gas. The results showed that the HCN breakthrough capacity was enhanced significantly when zeolites were loaded with Cu. The physical and chemical properties of the adsorbents that influence the HCN adsorption capacity were analyzed. The maximal HCN breakthrough capacities were about the same for both zeolites at 2.2 mol of HCN/mol of Cu. The Cu2p XPS spectra showed that the possible species present were Cu2O and CuO. The N1s XPS data and FT-IR spectra indicated that CN(-) would be formed in the presence of Cu+/Cu2+ and oxygen gas, and the reaction product could be adsorbed onto Cu/ZSM-5 zeolite more easily than HCN.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Copper, foil, ≥99.8% (complexometric)

Continuous cast copper (O), BCR^®, certified reference material, rod

Sigma-Aldrich

Copper, turnings, purum p.a., ≥99.0%

Sigma-Aldrich

Copper, powder, <75 μm, 99%

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Copper, wire, diam. 2.0 mm, 99.999% trace metals basis

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Copper, wire, diam. 0.25 mm, 99.999% trace metals basis

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Copper, wire, diam. 0.64 mm, 99.995% trace metals basis

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Copper, foil, thickness 0.025 mm, 99.98% trace metals basis

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Copper, foil, thickness 0.5 mm, 99.98% trace metals basis

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Copper, wire, diam. 1.0 mm, ≥99.9%

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Copper, beads, 2-8 mm, ≥99.99% trace metals basis

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Copper, foil, thickness 1.0 mm, 99.999% trace metals basis

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Copper, beads, 2-8 mm, 99.9995% trace metals basis

Sigma-Aldrich

Zeolite

Sigma-Aldrich

Aluminosilicate, mesostructured, MCM-41 (hexagonal)

Copper (S, P), BCR^®, certified reference material, chips

Copper, IRMM^®, certified reference material, 0.1 mm foil

Copper, IRMM^®, certified reference material, 0.5 mm wire

Sigma-Aldrich

Copper, shot, −3-+14 mesh, 99%

Sigma-Aldrich

Copper, nanopowder, 60-80 nm particle size (SAXS), ≥99.5% trace metals basis

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Copper, nanopowder, 40-60 nm particle size (SAXS), ≥99.5% trace metals basis

Copper (O), BCR^®, certified reference material, rod

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Copper, powder, 99.999% trace metals basis

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Copper, powder (dendritic), <45 μm, 99.7% trace metals basis

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Copper, powder, <425 μm, 99.5% trace metals basis

Sigma-Aldrich

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Sigma-Aldrich

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