Meeting report

N12

14-19oct

1995

Quebec City, Canada

l-5 July1996 Baltimore, MD, USA

22-27 Sep 1997 San Diego, CA, USA

* lndlcates new or rewed

Int Zeollte Symp. Contact L Bonnevlot,DBpartement de Chimle, Unwerslti Laval, SteFoy, QuBbec, Canada Gl K 7PA or S Kallaguine, DBpartement de Gbnle Chlmlque, Unwerslt6 Laval, Ste-Foy, Qu&ec, Canada Gl K 7P4

11th Int Congr. on Catalysis Contact Dr K Taylor, Physical Chemistry Dept , GM NAO R&D Center, 30500 Mound Road, Warren, MI 48OgO-9055,USA, (+ l-610) 9662010, fax (+ l-610) 9866697, e-mail KTAILORQCMSAGMR COM (Appl Catal, 113(1994)N6)

*3rd World Cong. on Oxldatlon Catalysis Contact R K Grasselll,Mob11R&D, Centr Res Lab, P 0 Box 1020, Princeton, NJ 08540, USA, (+ 1-8Og)7373000 entry

Announcements are Included free of charge at the discretion ofthe Eddor lnformatlon on planned events should be sent well In advance (preferably 6 months or more) to Dr B K Hodnett, Dept of Chemical and LifeSciences, University of Limerick, Plassey Technological Park, Limerick, Ireland, fax (+X&61) 330316 e-mall HODNETTK@UL IE or to Applied Catalysis, Desk Editorial Office, PO Box 330, 1000 AH Amsterdam, Netherlands, fax (+31-20) 6662459, e-mall WVONK@ELSEVIER NL

Meeting Report US-RUSSIAN WORKSHOP ON ENVIRONMENTAL CATALYSIS, Wlmington, DE, USA, 14-l 6th January, 1994 This Workshop was sponsored by the Catalysis Society and hosted in Wilmington Delaware, USA by the local organtsing committee, comprising Prof AlexisT Bell (Berkeley), Prof John G Ekerdt (Austin), Dr Leo E Manzer (Wilmington), Dr Thaddeus P Kobylinskl and Academictan Kirill I Zamaraev There were 65 registered participants, 25 came from Russia Prof Alexis T Bell opened the Workshop by giving some background on rts origins and the choice of theme He said that the idea of holding a Workshop was conceived by Academician Kirill I Zamaraev and himself during the 10th International Congress on Catalysis The decision to focus on environmental catalysis was made in recognaion of the Increasing worldwide concern with quality of the environment and awareness of the central role of catalysis in enabling the abatement of pollution from existing sources and development of novel, environmentally friendly technologies for production of fuels and chemicals Prof Bell expressed the hope that the Workshop would allow scientists and engineers in Russia and the US to become aware of each other’s research and technological accompllshments, provide an opportunity for individuals from both countriesforfuture interactions,

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and strmulate the fundrng agencres rn the US and Russia to develop mechanrsms for suppomng collaboratrve projects Two plenary talks and 50 papers were presented The first plenary talk was grven by Academrcran Zamaraev and described recent results obtarned in Russia in the areas of basic research and applied environmental catalysis He outlined resutts in characterisatlon and mechanistic studies, at the molecular level, of environmentally important catalysts and cataiytrc reactions, bromimetrc catalysis and natural catalytic processes Later, he focused on practical applrcatron of several technologies which were invented or are under develop ment n Russia, synthesis of HCFC compounds, a process for Son abatement, VOC control and CH4 oxidation, development of high performance spherical supports and catalysts for catalytic combustion in flurdrzed beds, development of new approaches for synthesis of honeycomb monoirths for catalytic combustion and NO, removal, development of new process of H& utrirsatron, etc The second plenary talk by Leo E Manzer was devoted to environmental challenges facing the petroieum and chemrcal rndustnes In adddion to remediation there are tremendous opportunrtres for catalysrs and process research in four main areas (1) more selective and active catalysts to reduce waste and energy consumption, (2) processes which mrnrmise the use, transportation and storage of hazardous matenais, (3) waste minimisatron though conversron of byproducts to coproducts, and (4) development of environmentaiiy safer products Examples from DuPont research rllustrated the potentral in each area Dr L L Hegedus presented a brief review of the US air pollutron picture and the technological implrcations of US environmental regulations He mentioned that the expected value of catalysts for environmental applications in the US in 1994 will be about $999m, one third of the total market of catalyst production Two sessions were entirely devoted to zeolrte catalyst development and applications C A Jones presented the results of catalytrc cracking of waste plastics, poiyurethanes and polyols to basic chemicals in frxed and fluid bed microreactors over solid-acid cracking catalysts, such as modrfied ZSM-5 At the 2!%-6WC, for typical consumer waste (mrxed PE, PP, PS, PET), yields of 2549% CT&. alkenes and 49-6996 aromatics were obtarned K G lone presented three promrsrng groups of environmentally friendly processes for basic and fine organic synthesis (1) Acid-base zeolrte catalysis for chemical synthesis Benzene nrtration, Beckman rearrangement of cyclohexanone to caprolactam, aikyiation of aniline to mono- and draikylanrknes, (2) synthesis of motor fuels from the tail gases of refinery and synthetic rubber plants Propene conversslon over ZSM-5 catalysts in the presence of H20, HP and CO, (3) Synthesis of gasoline from oxygen containing organic byproducts and wastes Conversion of C&C5 alcohols into rsoaikanes and aromatics at 290399% over ZSM-5 and ZSM-12 Similar approaches to reduce environmental problems by application of BETA zeolrte to cumene synthesis were demonstrated by D J O’Rear F G Dwyer described signrflcant effects of the zeolne ZSM-5 on heterogeneous cataiysis over the last 20 years and outlined three new areas where substantial environmental contributions have been made B B Romanovskrr presented the results of synthesis, charactensatron and catalytrc application of a series of metal phthalocyanrnes (MPc) incorporated into the void space of Y-type zeolkes The catalysts prepared by this “ship-in-a-bottle” method were

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tested on the transformation of envrronmentally hazardous substances such as mercaptanes, CO and NO, A senes of papers was devoted to progress In appllcatlon of different zeolne catalysts for the removal of nitrogen oxides from tall gases J N Armor and co-workers have dtscovered a family of metal loaded zeolrtes (Cu and Co exchanges ZSM5, mordenrte, zeolrte beta, ZSM-11 and fernente) that have high actrvrty and selectrvrty for the decomposition of N20 into N2 and O2 The Improved catalysts readily destroy N20 at low (ppm) and hrgh (39%) levels in the presence of 2% water vapour C&exchanged X- and Y-Faujasttes, mordenrte and ZSM-5 zeolrtes were tested for selective catalytrc reduction of NO by propane under conditions representatrve of power-plant stack gases (C H Bartholomew) The aim of the presentation by AT Bell was to identrfy the working oxidatron state of Cu in zeolrte, the factors governing the redox chemistry of Cu2+/Cu’, and the nature of the rnteractrons of NO with Cu cations in the zeolrte by means of ESR and IR spectroscopy He suggested autoreductron of Cu2+ in air-exposed CU-ZSM5 upon heatrng Cu+ Ions thus formed are not oxidized by O2 even at 500°C but are readily oxldrted by l-t20 At temperatures where NO decomposition occurs, only nitnto, nrtrato, and nrtroso groups were observed The results of mechanistic studies of NO reduction by hydrocarbons over ZSM-5 zeolrtes containing attervalent base-exchanged cations were presented by W K Hall Another approach to solving the problem of emrssrons of nrtrous oxrde IS Its use as a raw material or as oxrdant in organic synthesis (G I Panov) The results of 190% selectivity In direct oxidation of benzene to phenol by N20 as a feasible alternative to the cumene process consistrng of three stages was drscussed The unsteady-state REVERSE-NO~ process for SCR of low temperature gases appears to be a highly effrcrent and energy saving technology (A S Noskov) Advantages of the process have been demonstrated at an industrial unit for NO, purification A feed temperature of 30-40°C and NO, concentration of 2-15 g/m3 the residual content of nitrogen oxides does not exceed 50-90 mg/m3 The more extensive experience of the catalytic Reverse-Process for industrial off-gas punfrcation wrth periodic alternatron of the drrection of gas flow through the bed was presented by Y Sh Matros The new possibrlrtres of catalysis for treatment of hazardous mixed waste from nuclear material processing plants were presented by Z R lsmagilov on behalf of a joint US-Russian project (Lawrence Livermore National Laboratory and Boreskov lnstrtute of Catalysis) At nuclear material processing plants of US and Russia there are large inventories of complex mixtures containing hazardous organics (industrial oils, vacuum grease, used extractants, solvents, etc ) and some amounts of U, Pu and their fission products The environmentally safe technology of catalytic incineratron of mrxed waste in a fluidized bed reactor wrth the subsequent purification of tall gas from acid components and radroactrve dust IS under development The presentation of S R Khairulin was devoted to the catalytic technology for another bunch of environmental problems whrch have appeared in Russia, namely explortation of oil and gas fields with very high (up to 25%) concentrations of H2S In the Casplan sea region The essence of a new technology ISthat the raw natural gas containing hydrogen sulphide ISsupplied into aflurdrzed bed reactor of spherical catalyst granules simultaneously oxygen or air IS supplied provrding stoichiometnc ratto of components for H2S + O2 + S + H20

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The envrronmental Importance of transrtron metal sulphrde catalysrs in reducing arr pollution by the production of cleaner fuels was discussed by R R Chranellr The highly anisotropic structure of MO& plays an important role In stabrlrzing “edge srtes” and Co and NI promoted srtes also located at the edge Stacking of the MoS2 layers produces more aromatic products and “destackrng” of the layers produces more saturated products Concernrng the problem of CO2 utrlrsatron A Ya Rozovskr reported a very high output Faher-Tropsch catalyst for C2 hydrocarbon synthesis and a second catalyst which grves an unusually high maximum for C ,,,-C12 hydrocarbons Catalysts based on manganese oxide were found to be the most active and selective in oxrdatrve interaction of CO2 wrth hydrocarbons and alcohols (0 V Krylov) Other themes addressed at the workshop were the uses of membranes, oxrdatron, photocatalysa, and the destruction of chloroaromatrcs The head of the Russian delegation, Academician Kin11I Zamaraev, delivered the concluding remarks He pointed out that many interesting resufts and technologies for environmental protectron were presented at the Workshop He emphasised the complementary nature of the majonty of the technologies presented by each side and he saw good opportunities for more active cooperation, and for joint actrvrtres In commercralisatron and technology transfer Academician Zamaraev further noted that one of the major advantages of the Workshop was the discovery by the Russian participants of considerable interest In their work by American companies, which could lead to further contacts and cooperation AcademIcran Zamaraev indicated that the success of this meeting provides a good starting point for the organisatron of the next Workshop in Russia He noted that the preliminary proposal to hold the meeting in late May or early June of 1995 at one of the Academy rnstdutes rn Moscow or on a boat on the Volga river sounded acceptable to the American participants ZINFER R ISMAGILOV

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applied catalysis q environmental

Volume 4 No 1 - 19 July 1994