impregnated zeolite catalysts for halogenated VOCs

the data results from any experimental measurement) and statrsttcal programmes (where the data results from specres censuses) The 402 programmes publrshed In thus Issue have been subdrvrded rnto eight sections, 23 groups and 53 sub-groups The eight main sections are Biosphere and Natural Space, Water Resources and Use, Climate Air and Atmospheric Emissrons, Ground Quality and Pollution Refuse, Territory and Natural Resources, Risk and Health, Economic Activrty, Political and Social This classdrcatron in broad sections and sub-groups, all given In an Index, allows the reader to quickly find that part of the catalogue he or she IS interested in Programmes are shown in two ways depending on their importance Main programmes, whrch are generally nationwide, are presented on two facing pages The marn characteristics of the programs are given (arm of the study, method used, location, researchers) and the references of the operator (type of data base, address) A map IS also given, showtng the different locatrons of the measurements and their Secondary programmes, frequency which are generally more local, are shown on a half page, wrth less information (aim of study, method used, address of the operator) Anyone who IS searching for data, in any field related to the environment, will find this to be a powerful and useful tool The clanty of classlflcatron of research and the concrse programme descnptions make this catalogue a pleasure to use For further information, contact the following address IFEN, 17 rue des Huguenots, 45958 Orleans Cedex 1, France, tel (+ 33) 38797878 FREDERIC MEUNIER applied catalysis B environmental

Metal-exchangad/impregnated Zeollte Catalyete for Halogenated VOCs

In a recent US Patent [5,276,249], H L Greene and S Chatterjee of the Unrversrty of Akron described the use of metal exchanged and metal impregnated zeolite catalysts for the oxidation of halogenated organics In this processed patent they claim the use of V, Cr, Co, NI, Cu, Fe, MO, and Mn metal exchanged alumrnosilicate zeolrtes (including Y, A, ZSM series, etc) forthe removal of chlonnated or fluorinated hydrocarbons Extenswe descriptions are offered on impregnating monolrth structures containing these zeolrte catalysts Among the most active catalysts were chromic acid impregnated onto Cr-Y zeoltte coated monoliths For example wrth CH&12 at 356°C this catalyst gave 91% conversion wrth 88% HCI and 7% Cl2 The presence of water actually insures that the formation of HCI ISfavoured by shrftrng the equilibrium ofthe Deacon reaction [2Cl2 + 2H20 = 4HCI + 021 J N ARMOR

Forthcoming Mwtlngs The Second Japan-European Community Joint Workshop on the Frontiers of Catalytic Scrence and Technology for Energy, Environment and Risks Prevention (JECAT ‘95) will be held in Lyon, France, from 26 to 28 April 1995 This meeting will focus on Clean fuels production (upgrading of refinery product, synthetic fuefs derived from organic matter), Catalytic combustion of hydrocarbons (energy production, volatile organrc compounds removal), Exhaust gas treatments (automotive emrssions, fixed plant emrssions), water treatment, and CO;! fixation and use Volume 4 No 1 -

19 July 1994