Chemical and spectroscopic properties of copper containing zeolites

Texter, John; Strome, David H.; Herman, R. G.; Klier, K.

doi:10.1021/j100519a011

Cited by 110 publications

(55 citation statements)

References 5 publications

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“…Catalysts based on Cu/ZnO/A1203 are thought to be solid solutions of univalent copper in zinc oxide. Cu(1) is a strong adsorber of CO (Cotton and Wilkinson, 1966), but adsorbs H2 just weakly (Texter et al, 1977), whereas ZnO is an active hydrogenation catalyst capable of adsorbing and splitting H2. Herman et al (1979) and Andrew (1980) have shown that small amounts of CO, or H20 activate the catalyst dramatically, apparently through the oxidation of copper.…”

Section: Interpretation Of the Curious Time Behaviour Seen Inmentioning

confidence: 99%

Influence of forced feed composition cycling on catalytic methanol synthesis

et al. 1985

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Studies have been carried out between 230 and 270°C and 1.97 and 2.93 MPa total pressure on the synthesis of methanol over an industrial catalyst of the copper‐zinc oxide‐alumina type using a gradientless reactor. Two modes of forced feed composition cycling were explored: periodic variations of the mole fraction of H2 and CO and periodic variation of the CO2 content. The latter mode substantially improved methanol production and suppressed the parasitic formation of methane, while the former mode had just the opposite effect. Measurements of methanol, methane and CO during a cycle as well as separate observations of the response to step‐changes in concentration indicated substantial storage of CO on the catalyst surface. Rapid response of methane to the CO2 content suggests over‐reduced areas of the catalyst surface are responsible for methane formation and that these regions are readily oxidized. CO2 or H2O associated with methane formation appear to relate to the dynamics of methanol formation.

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Section: Interpretation Of the Curious Time Behaviour Seen Inmentioning

confidence: 99%

Influence of forced feed composition cycling on catalytic methanol synthesis

et al. 1985

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“…The value of TPR techniques for the characterization of metal-containing zeolites has already been demonstrated by early studies [35,[84][85][86][87] and these have been reviewed by Hurst et al [10]. As shown in Table 2, the temperature required for reduction of Pd(NH 3 ) 2+…”

Section: F Metals In Zeolitesmentioning

confidence: 97%

Temperature‐Programmed Reduction and Oxidation1A list of symbols used in the text is provided at the end of the chapter.

Knözinger

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction The TPR Experiment Kinetics and Mechanism of Reduction Mathematical Treatment of TPR Profiles and Influence of Experimental Parameters Examples Conclusion

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“…Nanometer metal catalysts such as Pt, Pd, Cu and others, were prepared on surfaces of zeolites by ion exchange and subsequent reduction in hydrogen a few decades ago. [103][104][105][106] Ion exchange takes place from high concentration ionic solutions. Hydrogen is most commonly used to reduce cations to their elemental forms.…”

Section: Minerals Infused With Copper Nanoparticlesmentioning

confidence: 99%

Inexpensive mineral copper materials with antibacterial surfaces

Drelich¹,

Li²,

Villeneuve³

et al. 2013

Surface Innovations

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Inspired by the mining tradition of the Copper Country area in Michigan (USA) and the original objectives ofMichigan Tech's founders, a research program with the mission to explore and promote new materials and products containing copper has been developed. Both ionic and elemental copper have been proven to effectively inhibit the growth of harmful bacteria, fungi and molds. Use of inexpensive natural minerals carrying only small quantities of copper, but still possessing antimicrobial properties, would benefit market and cost of manufacturing of a variety of antimicrobial products. Natural copper-bearing minerals could serve as antimicrobial materials but they, unfortunately, occur rarely. Natural aluminosilicates, including clays and zeolites, can be either saturated with copper ions or loaded with copper nanoparticles. Such copper-containing aluminosilicates show strong activity against pathogenic bacteria. Embedded copper broadens and revalues the applications of these inexpensive minerals in plastics, paints, water purification and other products where antimicrobial properties are desirable.

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Chemical and spectroscopic properties of copper containing zeolites

Cited by 110 publications

References 5 publications

Influence of forced feed composition cycling on catalytic methanol synthesis

Influence of forced feed composition cycling on catalytic methanol synthesis

Temperature‐Programmed Reduction and Oxidation1A list of symbols used in the text is provided at the end of the chapter.

Inexpensive mineral copper materials with antibacterial surfaces

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