Papers
             Separation

         59  Studies of downcomer behaviour for foaming and non-
              foaming systems
              I.J.Urua and M.C.G. del Cerro
         71  Liquid residence time in downcomers for foaming and
              non-foaming systems
              I.J.Urua and M.C.G. del Cerro

             Membranes

         79  A fixed-site carrier composite membrane for NH3/N2
              separation
              S.K. Shukla and K.-V. Peinemann
         83  Development of a gas-cleaning system for a scrap-tire
              vacuum-pyrolysis plant
              V.Roy, B.de Caumia and C.Roy

             Theory / Modelling

         89  Dynamics of pressurization and blowdown of an adiabatic
              adsorption bed: 4. Intraparticle diffusion/convection
              models
              Z.P.Lu, J.M.Loureiro, M.D.LeVan and A.E.Rodrigues
        101  Calculation of the hydrothermal long-term stability
              of zeolites in gas-desulhurization and gas-drying
              processes
              M.Suckow, W.Lutz, J.Kornatowski, M.Rozwadowski and
              M.Wark
        109  News
        110  Book reviews
        112  Calendar

Gas separation & purification

2(1992)