The effect of catalyst granule size on the hydrogenation of benzene over a supported nickel catalyst was written by Burke, R. F.;Motard, R. L.;Canjar, L. N.;Beckmann, R. B.. And the article was included in Journal of Applied Chemistry in 1957.Electric Literature of C10H13BrO This article mentions the following:
For the hydrogenation of C6H6 to C6H12 over Ni on silica gel at 225-275° and 6.44-3.74 atm., the velocity constant was proportional to the particle size of the catalyst down to 80-100 mesh, beyond which it did not increase. The active Ni content was the same for all particle-size fractions of the catalyst. It was thought that the catalyst activity increased with decreasing particle size because the active sites in the pores of the larger particles were blocked by C6H6 condensation and that the catalyst activity leveled off after the particles had been sufficiently subdivided so that all the active Ni was on the surface of the particles. In the experiment, the researchers used many compounds, for example, 1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3Electric Literature of C10H13BrO).
1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Electric Literature of C10H13BrO
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary