N30

ters of all relevant reactions 1.s also given trogen, conversion to N20 Increases with Equlllbnum calculattons, based on total coal rank In this regard, pyndlnlc nitrogen Gibbs energy mmlmization, are used to in coal may play an important role It ap- discuss reacttons occurnng In the gas pears that air staging may decrease N20 phase Most of the NzO IS formed in hete- formation The use of addltlves, such as rogeneous reactions, involving char NH3, urea and cyanunc acid to control N20 and/or coal bound nitrogen emissions was also investigated

Group VIII transition metal oxldes are active as catalysts for N20 decomposltlon CaO IS also very active This IS Important when limestone IS injected Into FBC How- ever, in the presence of llmestone de- creased N20 emissions were accompa- nied by increased NO formation In the presence of CaSO4, the N20 formation accompanied NO reduction Combmed ef- fects of Son, CaO and CaS0.j on N20 formation and/or decomposltlon dunng FBC combustion deserve some additional attention Also, information on the effect of coal’s mineral matter on N20/NOx emis- sions IS still rather limited

Besides temperature, which IS the most important parameter, other parameters also influence N20 formation Coal-nl-

No one-sided approach to N20 abate- ment IS likely to be successful due to a number of emission trade-offs between N20 and NO levels Emissions can be decreased through improvements In oper- ating condttions and lnnovatlve combustor design Also, emissions of one pollutant can be sacrrflced for the sake of other pollutants while adopting special measures to reduce excessive levels ofthe selected pollutant It IS judged that suc- cessful N20/NOx abatement measures may include gas afterburning, use of cata- lytic adddtves to enhance N20 decompo- sition and an aftertreatment of flue gas at lower temperatures

ED FURIMSKY

Calendar of Forthcoming Events (For detailed information on the crted events, please refer to the Applied Catalysis issue mentioned wfih the entry )

17-21 Ott 1993 St Petersburg, Russia

17-19 Ott 1993 Redwood Qty, CA, USA

*Symposium on Ceramic Materials, Including In the Auto- mobile Part of 4th European East-West Conference and Exhibi- tion on Materials and Processes Contact A G Romashm, Technologlya, 15 ffiev Chaussee, 240920 City of Obnmsk (Kaluga), Russia, (+7-095) 5463915, fax (+7-8439) 2552225 or R J Brook, Unlv of Oxford, Dept of Materials,, Parks Road, Oxford OX1 3PH, UK, (+44-865) 273782, fax (+ 44-855) 273789

10th Anniversary Advances in Catalytic Technology (ACT) Seminar Contact J Naworskl, CatalytIca Studies Dlwslon, 430 Ferguson Drive, Mountam View, CA 94043-5272, (+ l-415)9406300, fax (+ l- 415)9587129

applied catalysis 8. environmental Volume 2 No 4 - 15 September 1993

24-27 Ott 1993 Cape Town, South Afnca

3-5Nov 1993 Louvarn-la-Neuve, Bel- gium

7-12 Nov 1993 St LOUIS, MO, USA

2-4Dec 1993 Sapporo, Japan

13-18Mar 1994 San Dlego, CA, USA

1318Mar 1994 San Drego, CA, USA

13-18Mar 1994 San Diego, CA, USA

23-28 Mar 1994 San Drego, CA, USA

20-22Apr 1994 Brussels, Belgium

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Int Conf. on Catatysls and Catalytic Processing Contact J Fletcher, Seer Catalysis and Catalytic Processing, Dept of Chem Eng , Unnrersrty of Cape Town, Private Bag, 7700 Ronde- bosch, South Africa, (+27-21)4618645 (Appl Catal ,89(1992)N8)

2nd Int Symp. on Characterization and Control ot Odours and VOC in the process Industries Contact Sot Beige de Filtration, Unrv Catholrque de Louvarn, Vole Mrnckelers 1, 1348 Louvarn-la-Neuve, Belgium (+32-lo)472328

Symp on Fundamentals ot Oxide Catalysis Part of lgg3 AlChE Ann. Mtng. Contact J G Ekerdt, Dspt of Chem Eng , Unrv of Texas, Austin, TX 78712, USA, (+1612)4714689,fax (+l-512)471706O,e-mail )ge@mall the utexas edu (Appl Catal ,97(1993)N20)

Acid-Base Catalysis II Int. Symp. In Honour of Kozo Tanabe Contact H Hatton, Dept of Chem , Fat of Science, Hokkardo Unrver- slty, Sapporo 060, Japan, (+81-11)7162111X5283, fax (+81- 11)7575995 (Appl Catal ,91(1992)N19)

1994 ACS Spring Meeting Contact S K Agarwal, Center for Process Research, Research Triangle Institute, P 0 Box 12194, Research Triangle Park, NC 27709, USA or G Mar&n, Unrversrty of Pittsburgh, Pittsburgh, PA 15261, USA

ACS Mtg. on Distillate Fuel Auto-Oxidation Chemistry Contact WE Harrison Ill, WL/POSF, Wright Laboratory, Wnght-Patter- son kr Force Base, OH 454336563, USA, tel (+ l-513)2556601, fax (+ l-513)2551 125 (Appl Catal ,94(1993)Nll)

*ACS Spring Meeting on NOx Reduction Contact S K Agarwal, Center for Process Research, Research Triangle Institute, P 0 Box 12194, Research Triangle Park, NC 27709- 2194, USA (+ l-919)5418024, fax (+ l-919)5418000, G Marcelrn, Chemical and Petroleum Engrneenng Dept , Unrversrty of Pittsburgh, 1249 Benedum Hall, Pittsburgh, PA 16281, USA (+ l-412)6249647, fax (+ l-412)6249639, or U S Oskan, Dept of Chemical Engineering, 140 W, 19th Avenue, Columbus, OH 43210, USA (+ l-814)2926623, fax (+ l-614)2923760

*Symp on Fischer-Tropsch and Alcohol Synthesis Contact Prof E Iglesra, Dept of Chemical Engrneenng, Unrversrty of California at Berkeley, Berkeley, CA 94720, USA, (+ l-510)6429673, fax (+ l-510)6424778 or Dr R A Fiato, Exxon Research and Engrneer- rng Co , 180 Park Ave , Bldg 101, Rm E224, Florham Park, NJ 07932, (+ l-201)7652153, fax (+ l-201)7651901 (Appl Catal , 102(1993)N4)

*3rd International Congress on Catalysis and Automotove Pollution Control Contact J -M Bastin, Sectretary CAPoC3, ULB, Catalyse Heterogene, CP 243, Campus de la Plarne, 51050 Brussels, Belgium (+32- 2)6505710, fax, (+32-2)6505708

applied catalysts B environmental Volume 2 No 4 - 15 September 1993

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2- 5 May 1994 Phoenix, AZ, USA

22-25 May 1994 Palm Springs,, CA, USA

24-27 May 1994 Samra, Ont , Canada

l-3June 1994 Helsrngrar, Denmark

2730 June 1994 Yenesel River, Slbena, Russia

lo-15 July 1994 Kerkrade, Netherlands

17-22 July 1994 Garmlsch-Partenkrrchen Germany

21-26Aug 1994 Tokyo, Japan

21-26Aug 1994 Washington, DC, USA

21-26 Aug 1994 Washington, DC, USA

15th Conf. on Catalysis of Organic Reactions Contact M G Scares, Searle R&D, 4961 Searle Parkway, Skokre, IL 66677, USA, (+ l-766)9627656, fax (+ l-766)9824771 (Appl Catal , 94(1993)N22)

* Frontier8 in Catalysis Contact Dr J N Armor, Air Products & Chemaals, 7261 Hamilton Blvd , Allentown, PA 16195, USA, fax (+ l-215)4612969 (Appl Catal, 102(1993)N4)

13th Canadian Symp. on Catalysis Contact D Laycock, Dow Chemical Canada Inc ,1666 Modeland Road, P 0 Box 1012, Sarnra, Ont , N7T 7K7, Canada

43th Nordic Symposium on Catalysis Contact Per Stoltze, Department of Physics, BulldIng 367, Technical Unlversrty of Denmark, DK-2666 Lyngby, Denmark, (+45) 45931222X3172, fax (+45) 45932399, e-marl stoltze@fysrk dth dk (Appl Catal, 109(1993)N)

2nd Workshop on Hydrocarbon Conversion Contact E N Voskresenskaya, ENV, Institute of Chemistry for Natural Organrc Materials, K Marx St 42,660049 Krasnoyarsk, Russia, Telex 266117 KUGL SU, fax (+7-391) 2275364 (Appl Catal, 166(1993)N7)

6th Roermond Conf. on Catalysis Contact MS I van? Blrk, Laboratory of lnorganrc Chemistry, and Catalysis, Emdhoven Unrversity of Technology, P 0 Box 513,5600 MB Bndhoven, Netherlands tel (+31-46)472730, fax (+31- 40)455054 (Appl Catal ,92(1992)N5)

10th International Zeolite Conf Contact J Wertkamp, Institute of Chemical Technology I, University of Stuttgart, Pfaffenwaldnng 55, D-W-7ooO Stuttgart 80, Germany, fax (+ 49-711)6654965

2nd Tokyo Conf. on Advanced Catalytic Science and Rch- nology, TOCAT 2 Contact Y Ono, Secretary TOCAT 2, Dept of Chem Eng , Tokyo lnst of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan (Appl Catai , 91(1992)N19)

ACS Mtg on Advances in Hydrotreatlng CataIysts Contact M L Occelk, Georgia Institute of Technology, Baker Build- ing, Room 276, Atlanta, GA 30332, USA, tel (+ l-404)6943487, fax (+ l-404)8945673 (Appl Catal ,94(1993)Nll)

Approaches to Aromatics/Sulphur/Olefins Reduction Contact S Kukes, Amoco Research Center, P 0 Box 3011, Naper- wile, IL 695663611, tel (+ l-796)9617949 (Appl Catal , 94(1993)Nll)

applied catalysis B envlronmental Volume 2 No 4 - 15 September 1993

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29 Aug - 2 Sep 1994 *7th int Symp. on Synthetic Membranes in Science and in- Tubingen, Germany dustry

Contact Congress Secretariat, DECHEMA e V , ExhibitIons and Con- gresses, Theordor-Heuss-Allee 25, P 0 Box 150104, D-60081 Frank- furt am Main, Germany, (+49-69)7564241, fax (+49-69)7564201

l-l Sep 1994 Novoslblrsk, Russlan Federatlo

5-8Sep 1994 Louvaln-la-Neuve, Eel- glum

25-28Sep 1994 Baltimore, MD, USA

26-28 Sep 1994 Lyon, France

10-16 June 1995 Snowbird, UT, USA

30 June- 5 July 1996 Baltimore, MA, USA

3rd Conf. on Honeycomb Monolithic Supports and Cata- iYsts Contact N N Sazonova, Prosp Akad Lavrentieva 5, Soreskov In- stltute of Catalysts, @W90 Novoslblrsk (+7-383) 2350259, fax (+7- 383) 355756 (Appl Catal ,97(1993)N3)

Vith int. Symp. on ‘Scientific Bases for the Preparation of Heterogeneous Cataiysts Contact G Poncelet, Unit6 de Catalyse et Chlmie des Matenaux DI- wsh, Universit6 Catholique de Louvaln, 51348, Louvain-la-Neuve, Belgium Tel (+32-10)473649, fax (+32-lo)472005 (Appl Catal , 101(1993)N4)

*13th int Symp on Chemical Reaction Engineering Contact C J Pereira, W R Grace & Co , Research Dvision, 7379 Route 32, Columbia, MD 21044, USA, (+ l-410) 5314335, fax (+ l- 410) 5314491 (Appl Catal, 100(1993)N7)

* 1 st int. Workshop on Catalytic Membranes Contact J -A. Dalmon or C Mlrodatos, lnstltut de Reoherches sur la Catalyse, 2, av Albert Gnsteln, 89826 Villeurbanne C6dex, France, (+33)72445368 or (+33)72445365, fax (+33)72445399 (Appl Catal, 93(1993)N20)

*14th North American Meeting of the Catalysis Society Contact S Gebhard, National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401, USA

*llth int Congress on Catalysis Contact Dr K Taylor, Physical Chemistry Dept , GM NAO R&D Cen- ter, 30800 Mound Road, Warren, Ml 48090-9085, USA, (+ l- 313)9882010, fax (+ l-313)9888897

* Indicates new or revised entry

Announcements an included free of charge atthe dlscrtion ofthe Editor, InformatIon on planned events ghould be sent well In advance (preferably 6 month8 or more) to Dr B K Hodnett, Dept of Chemical and LifeSciences, Unlverslty of LimelIck, Plassey Technological Park, Limerick, Ireland, fax (+353-61) 330316 or to Appl@d Catalysis, Desk Ednonal Office, PO Box 330,lOOO AH Amsterdam, Netherlands, f&x (+31-20) 6662459

applied catalysis B. environmental Volume 2 No 4 - 15 September 1663