Selectivity acetylene

For selective acetylene adsorption from other hydrocarbons (e.g., ethylene and ethane), NiCl2 supported on alumina or silica can form reversible jr-complexation bonds with acetylene but not olefins. Pure component acetylene-ethylene ratios of up to 3 were obtained (Kodde et al., 2000). The bonding between acetylene and NiCl2 is reasonably understood (Huang and Yang, 1999). 

Cu-Ir Au-Ir Coimpregnation / - / - Hexane/H2 activity/select. Acetylene/H2 activity/select. 

M. Ruta, G. Laurenczy, P.J. Dyson, L. Kiwi-Minsker, Pd Nanoparticles in a Supported Ionic Liquid Phase Highly Stable Catalysts for Selective Acetylene Hydrogenation under Continuous-Flow Conditions, J. Phys. Chem. C 112 (2008) 17814. 

Diethylamine N-Methyl-2-pyrrolidone Sulfolane Thiodipropionitrile solvent, selective acetylene extraction N-Methylformamide... 

Ruta, M., Laurenczy, G., Dyson, P.J., and Kiwi-Minsker, L. (2008) Pd nanoparticles in a supported ionic liquid phase highly stable catalysts for selective acetylene hydrogenation under continuous-flow conditions. J. Phys. Chem. C, 112, 17814-17819. 

Pt particles with the IL protects the catalyst from oxidation, which can be utilized to protect air-sensitive catalysts [35]. Further examples of heterogeneous reactions on metal immobilized in porous supports using ILs are Heck C-C coupling on Pd [36] benzene hydrogenation on nanoscale Ru-catalysts [37] selective acetylene hydrogenation on Pd-nanoparticles, for example, dissolved in [BMlM][PFg] [38] and citral hydrogenation on Pd immobilized by different ILs on an active carbon cloth [39]. 

Padin, J., and Yang, R.T., Tailoring new adsorbents based on pi-complexation Cation and substrate effects on selective acetylene adsorption, Ind. Eng. Chem. Res., 36(10), 4224-4230 (1997). 

Following the above procedures, dispose of properly scrapped acetylene cylinders in landfills that are permitted to accept industrial solid waste or otherwise identified as special waste. An option to the disposal of acetylene cylinders in landfills is the bake out of cylinders to remove the acetylene absorbent. Bake out may be available in certain areas through private or commercial arrangements. When bake out is selected, acetylene cylinders are first prepared by recovering any residual acetylene as described above. Valve removal and cylinder scrapping is done after the bake out process. These activities should be prearranged with the... 

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