Impregnated activated carbons

Impregnated Activated Carbon Used to Remove Gaseous Radio-Iodines from Gas Streams... 

Benzene hydroxylation to Phenol with Iron impregnated Activated carbon Catalysts... 

To study the effect of solvents, reactions carried out with acetonitrile ( benzene acetonitrile = 1 4.65, 1 6.58 mole ratio), and acetone (benzene acetone = 1 6.58 mole ratio) as solvents on 5.0 wt% iron impregnated activated carbon catalyst and the results were compared. The results are... 

The preparation of iron impregnated activated carbon as catalysts and the catalytic performance of these catalysts were studied in benzene hydroxylation with hydrogen peroxide as oxidant. 5.0Fe/AC catalyst containing 5.0 wt% iron on activated carbon yielded about 16% phenol. The addition of Sn on 5.0Fe/AC catalyst led to the enhancement of selectivity towards phenol. 

Weiss used impregnated activated carbon with fatty acid or non-electrolyte thereby modifying and attributing special and improved adsorption characteristics. 

Up to now, a variety of non-zeolite/polymer mixed-matrix membranes have been developed comprising either nonporous or porous non-zeolitic materials as the dispersed phase in the continuous polymer phase. For example, non-porous and porous silica nanoparticles, alumina, activated carbon, poly(ethylene glycol) impregnated activated carbon, carbon molecular sieves, Ti02 nanoparticles, layered materials, metal-organic frameworks and mesoporous molecular sieves have been studied as the dispersed non-zeolitic materials in the mixed-matrix membranes in the literature [23-35]. This chapter does not focus on these non-zeoUte/polymer mixed-matrix membranes. Instead we describe recent progress in molecular sieve/ polymer mixed-matrix membranes, as much of the research conducted to date on mixed-matrix membranes has focused on the combination of a dispersed zeolite phase with an easily processed continuous polymer matrix. The molecular sieve/ polymer mixed-matrix membranes covered in this chapter include zeolite/polymer and non-zeolitic molecular sieve/polymer mixed-matrix membranes, such as alu-minophosphate molecular sieve (AlPO)/polymer and silicoaluminophosphate molecular sieve (SAPO)/polymer mixed-matrix membranes. 

Vaughan, R.L., Jr., Reed, B.E. and Smith, E.H. (2007) Modeling As(V) removal in iron oxide impregnated activated carbon columns. Journal of Environmental Engineering, 133(1), 121-24. 

Filter paper impregnated activated carbon Gaseous (volatile material) " 1,3 S, 2 Hg Gross P-and y-ray measurement y-ray spectrum analysis... 

Bagreev, A. and Bandosz, T.J. (2002). A role of sodium hydroxide in the process of hydrogen sulfide adsorption/oxidation on caustic-impregnated activated carbons. Ind. Eng. Chem. Res., 41, 672—9. 

Alves, B.R. and Clark, A.J. (1986). An examination of the products formed on reaction of hydrogen cyanide and cyanogens with copper, chromium (6-F) and copper-chromium (6-f) impregnated activated carbons. Carbon, 24, 287-94. 

Alder, J.F., Fielden, P.R., and Smith, S.J. (1988). The adsorption of hydrogen cyanide by impregnated activated carbon cloth. Part I studies on cobalt and nickel acetatates as impregnants for hydrogen cyanide removal. Carbon, 25, 701-11. 

Activated carbon does not seem to be a good adsorbent of ammonia present in air. Thus, in order to increase the adsorption capacities of such a material, an impregnation with metal or metal oxides is performed. Iron, copper or other metal-impregnated activated carbons are commonly used. 

Not all of the above mentioned contaminants behave equally in contact with carbon. For example, removal efiBciency of some halogenated VOCs (such as vinyl chloride or dichloroethylenes) is limited. Moreover, to remove arsenic from contaminated waters special grades of impregnated activated carbons are used [141],... 

Commercial grades of impregnated activated carbons for gas-phase applications [199-202]... 

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