Catalytic membrane for simultaneous chemical reaction and separation applied to a dehydrogenation reaction

The catalytic dehydrogenation of isobutane to isobutene in a palladium/silver composite membrane reactor

“…Porous membranes such as glass and alumina [6,7] have been used to study the catalytic dehydrogenation of hydrocarbons and conversions as high as two to seven times the equilibrium level have been observed for some reactions [8][9][10]. However, these membranes exhibit poor selectivity, due largely to the nature of the flow process in their pore structure.…”

Adsorption-enhanced steam–methane reforming

“…permeate purge) gases, have limited the usefulness of the membrane reactor systems. Nevertheless, the bene"ts of the membrane systems have been demonstrated though a wide number of experimental reaction studies, examples of which include the dehydrogenation of ethane (Tsotsis, Champagnie, Vasileiadis, Zraka & Minet, 1992), cyclohexane (Sun & Khang, 1988), ethylbenzene (Wu, Gerdes, Pszczolowski, Bhave & Liu, 1990), and acetylene (Itoh, Xu & Sathe, 1993), CO production via the water}gas shift reaction (Uemiya, Sato, Ando & Kikuchi, 1991), and steam}methane reforming (Adris, Lim & Grace, 1994, 1997.…”

Supported liquid‐phase catalytic membrane reactor–separator for homogeneous catalysis

“…Itoh (1987) also studied cyclohexane dehydrogenation in a packed-bed membrane reactor but used a thin (25-pm) palladium tubular membrane. Due to the highly selective diffusion of H, through the palladium membrane, almost complete conversion was achieved at low space velocities as compared with the equilibrium conversion of only 18.7% at the reaction temperature of 473 K. Sun and Khang (1988) also obtained enhanced conversion of cyclohexane in a membrane reactor consisting of a porous vycor glass membrane with Pt catalyst deposited on it. …”