Adsorption of 1,2-Dichlorobenzene on a Carbon Nanomaterial Prepared by Decomposition of 1,2-Dichloroethane on Nickel Alloys

Concept of complex processing of chlorinated hydrocarbons, involving catalytic decomposition of 1,2-dichloroethane on Ni–M alloys to obtain a carbon nanomaterial (CNM) showing high performance in adsorption treatment of water to remove 1,2-dichlorobenzene, was presented. A series of finely dispersed Ni–Pd (5 wt %) and Ni–Mo (5 wt %) alloys were synthesized and studied. The samples were studied as catalysts in decomposition of C 2 H 4 Cl 2 vapor at 600°С to obtain a carbon nanomaterial. The addition of 5 wt % second metal leads to an increase in the yield of the carbon nanomaterial from 20.1 to 25.4 (Ni–Pd) and 31.8 g CNM g –1 cat (Ni–Mo). Analysis by electron microscopy and Raman spectroscopy shows that the carbon product consists of nanofibers of segmented structure, constituted by a poorly ordered graphite phase. The specific surface area of the carbon nanomaterial is 230–280 m 2 g –1 . The CNM/Ni, CNM/Ni–Pd, and CNM/Ni–Mo samples obtained were tested as adsorbents for water treatment to remove dissolved 1,2-dichlorobenzene ( с 0 = 73–880 μM) in the batch mode. The 1,2-dichlorobenzene adsorption isotherms were constructed. The degree of filling of the carbon nanomaterial surface with the adsorbate at equilibrium is 43–47%, exceeding by a factor of more than 2 the utilization efficiency of AG-2000 activated carbon ( S BET = 1230 m 2 g –1 ).