Dr. Beena Tyagi

Designation: Principal Scientist
Phone No:
2567760
Phone Ext. No: 7090
E-Mail: btyagi[at]csmcri.res.in

Research Activities


Heterogenous acid catalysis; Zirconia based solid acid catalysts for various industrially important organic transformations such as Isomerization, Acetylation, Esterification, Pechman reaction etc.


Expertise


Sulfated zirconia solid acid catalyst: synthesis, characterization and catalytic application


 

  1. Esterification of caprylic acid with alcohol over nano-crystalline sulfated zirconia  K. Saravanan, Beena Tyagi*, H.C. Bajaj J.Sol-Gel Sci Technol 62:13–17, DOI 10.1007/s10971-011-2671-9, 2012
  2. Synthesis of dypnone by solvent free self condensation of acetophenone over nano-crystalline sulfated zirconia catalyst K. Saravanan, Beena Tyagi*, H.C. Bajaj J.Sol-Gel Sci Technol 61:275–280, DOI 10.1007/s10971-011-2624-3, 2012
  3. Epoxidation of styrene with molecular O2 over Binary Layered Double Hydroxides as solid base catalysts Beena Tyagi, Ulka Sharma and R.V. Jasra* Appl. Catal. A: General 408,171-177, 2011
  4. ZrO2–SiO2 mixed oxides xerogel and aerogel as solid acid catalysts for solvent free isomerization of α-pinene and dehydration of 4-methyl-2-pentanol Kalpesh B. Sidhpuria, Beena Tyagi*and Raksh V. Jasra*Catal. Lett. 141, 1164-1170, 2011
  5. Epoxidation of styrene with molecular O2 over sulfated Y-ZrO2 based solid catalysts Beena Tyagi*, Basha Shaik and H.C. Bajaj Appl. Catal. A: General 383, 161-168, 2010
  6. Solvent free Synthesis of Acetyl Salicylic Acid over Nano-crystalline Sulfated Zirconia Solid Acid Catalyst Beena Tyagi*, Manish K. Mishra, Raksh V. Jasra*J. Mol. Cat. A: Chemical 317, 41-46, 2010
  7. Effect of Si/Zr molar ratio and Sulfation on Structural and Catalytic Properties of ZrO2- SiO2 Mixed Oxides Beena Tyagi*, Kalpesh B. Sidhpuria, Basha Shaik and Raksh Vir Jasra*†J. Porous Mater, 17, 699-709, 2010.
  8. Microwave-assisted epoxidation of styrene with molecular O2 over sulfated Co-Y-ZrO2 solid catalyst Beena Tyagi*, Basha Shaik and H. C. Bajaj Catal.Commun. 11,114-117. 2009
  9. Solvent free Synthesis of 7-isopropyl-1,1-dimethyltetralin by the rearrangement of Longifolene using Nano-Crystalline Sulfated Zirconia Catalyst Beena Tyagi*, Manish K. Mishra, Raksh V. Jasra* J. Mol. Cat. A: Chemical, 301,67, 2009
  10. Influence of the surface acidity of ZSM-5 support on the catalytic activity of Rh/ZSM-5 for hydrodearomatization of toluene Kalpesh B. Sidhpuria, Parimal A. Parikh, Pratap Bahadur, Beena Tyagi  and Raksh Vir Jasra* Catal. Today,141, 12, 12-18, 2009
  11. Synthesis and Characterization of Mg-Al-CO3 Layered Double Hydroxide for CO2 Adsorption Ulka Sharma, BeenaTyagi,  Raksh V. Jasra*Ind. Eng. Chem. Res. 47(23), 9588–9595, 2008
  12. Microwave Assisted Solvent Free Synthesis of Hydroxy Derivatives of 4-Methyl Coumarin using Nano-crystalline Sulfated-Zirconia Catalyst Beena Tyagi *, Manish K. Mishra, Raksh V. Jasra *J. Mol. Cat. A: Chemical, 286, 41-46, 2008
  13. Synthesis of 7-substituted 4-methyl coumarins by Pechmann reaction using nano- crystalline sulfated-zirconia Beena Tyagi *, Manish K. Mishra, Raksh V. Jasra * J. Mol. Cat. A: Chemical 276, 47–56, 2007
  14. Synthesis of Nano-Crystalline Zirconia using Sol-Gel and Precipitation techniques Beena Tyagi*, Kalpesh Sidhpuria, Basha Shaik and Raksh Vir Jasra* Ind. Eng. Chem. Res. 45, 8643-8650, 2006
  15. Synthesis and Characterization of Nano-crystalline Mesoporous Zirconia using Supercritical DryingBeena Tyagi, Kalpesh Sidhpuria Basha Shaik and Raksh Vir Jasra J. Nanosci. Nanotech. 6, 1584-1593, 2006.
  16. Characterization of Surface Acidity of an acid-treated Montmorillonite Clay activated with Hydrothermal, Ultrasonic and Microwave Techniques Beena Tyagi*, Chintan D. Chudasama, and Raksh V. Jasra Appl. Clay Sci. 31,16-28, 2006
  17. Determination of Structural Modification in Acid Activated Montmorillonite Clay by FT-IR SpectroscopyBeena Tyagi*, Chintan D. Chudasama, and Raksh V. Jasra Spectrochimica  Acta Part A 64, 273-278, 2006
  18. Nitration of o-xylene over Rare Earth Cations Exchanged Zeolite-β with nitric acid and acetic anhydride V.N. Sheemol, Beena Tyagi and Raksh V. Jasra J. Mol. Cat. A: Chemical, 252, 194-201, 2006.
  19. Solvent Free Isomerisation of Longifolene with Nano-Crystalline Sulphated Zirconia Beena Tyagi, Manish K. Mishra and Raksh V. Jasra Catal. Comm. 7, 52-57, 2006
  20. Acylation of Toluene using Rare Earth Cation Exchanged Zeolite β as Solid Acid Catalyst V.N. Sheemol, Beena Tyagi and Raksh V. JasraJ. Mol. Cat. A: Chemical, 215, 201-208, 2004.
  21. Synthesis and Characterization of Nano-Crystalline Sulfated Zirconia by Sol-gel method M. K. Mishra, B. Tyagi and R. V. Jasra J. Mol. Cat. A: Chemical, 223, 61-65, 2004.
  22. Effect of Synthetic Parameters on Structural, Textural, and Catalytic Properties of  Nano-crystalline Sulfated Zirconia Prepared by Sol-Gel Technique Manish. K. Mishra, Beena Tyagi* and Raksh. V. JasraInd. Eng. Chem. Res. 42, 5727-5736, 2003.
  23. Effect of clay binder on sorption and catalytic properties of zeolite pellets R. V. Jasra, B.Tyagi, Y. M. Badheka, N. V. Chodary and S. G. T. Bhatt Ind. Eng. Chem. Res. 42, 3263-3272, 2003.
  24. A Review on Separation of Oxygen and Nitrogen from air by molecular sieve adsorbents B.Tyagi, C. D. Chudasama and Raksh. V. Jasra J. Indian Chemical Society, 78, 53-65, 2001.
  25. Di- and tetranuclear ruthenium(II) and/or osmium(II) complexes of polypyridyl ligands bridged by a fully conjugated aromatic spacers: Synthesis, characterization,  electrochemical behavior and photophysical studies. A.K. Bilakhiya, B. Tyagi, P. Paul and P. Natrajan Inorganic Chemistry, 41, 3830-3842, 2002.
  26. Dinuclear ruthenium(II) and/or osmium(II) complexes of bipyridyl ligands bridged by rigid spacers: Synthesis, characterization, electrochemical behavior and luminescence  properties. A. K. Bilakhiya, B. Tyagi and P. PaulPolyhedron, 19, 1233-43, 2000.
  27. Metal-assisted unusual hydroxylation at the carbon atom of the triazine ring in dinuclear ruthenium(II) and osmium(II) complexes bridged by 2,4,6-tris(2-pyridyl)-1,3,5-triazine: Synthesis, structural characterization, stereochemistry  and electrochemical studies P. Paul, B. Tyagi, A. K. Bilakhiya, P. Dastidar and E. Suresh Inorganic Chemistry, 39, 14-22, 2000.
  28. Stable mononuclear rhodium(II) polypyridyl complexes: Synthesis, spectroscopic and structural characterisation. P. Paul, B. Tyagi, A. K. Bilakhiya, M. M. Bhadbhade and  E. SureshJ. Chem. Soc. Dalton Trans., 2009, 1999.
  29. Synthesis and Characterisation of Rhodium Complexes Containing 2,4,6-tris(2-pyridyl)-1,3,5-triazine and It's Metal-Promoted Hydrolytic Products : Potential Uses of the New Complexes  in  Electrocatalytic  Reduction  of  Carbon  Dioxide P. Paul, B. Tyagi, A. K. Bilakhiya, M. M. Bhadbhade, E. Suresh and G. Ramachandraiah Inorganic Chemistry, 5733-42, 37, 1998.
  30. Predominance of Electron - Withdrawing Effect over Angular Strain in the Metal Promoted Hydrolysis of 2,4,6-tris(2-pyridyl)triazine P. Paul, B. Tyagi, M. Bhadbhade and E. Suresh J. Chem. Soc. Dalton Trans. 2273-77, 1997
  31. Synthesis, Characterization and Reactivities of Dinuclear Rhodium (I) Complexes of a Hexadentate Ligand   N,N,N¢,N¢ [2-(diphenyl phosphino) ethyl] ethane-1-2-diamine P. Paul and B. Tyagi  J. Coordination Chemistry, Vol. 40, 213-225, 1996
  32. Synthesis and Characterization of Dinuclear Platinum Group Metal Complexes of a Hexadentate   Ligand, a,a¢ -bis(bis-(2-(diphenyl phosphino)ethyl )amino-m-xylene  P. Paul and B. Tyagi Polyhedron, Vol. 15, 675-682, 1996.
  33. Voltametry of [LRuIII(OH)2]- and [LRuIII(N2H5)] Complexes at Mercury Electrode in Aqueous Solution G. Ramchandriah, B. Tyagi and R. Prakash  Bulletin of Electrochemistry, 13(7), 294-298, 1997.
  34. Electrometric Studies on the Reduction of N-N Bond of Metal Bound Hydrazine at Glassy Carbon Electrode in Acidic Solution. R. Prakash, B. Tyagi and G. Ramchandriah Indian J. Chem., Vol 36A, 201-205, 1997.
  35. Interaction of Phenylhydrazine with Ru(III)-EDTA Complexes: Reduction of Phenylhydrazine to Ammonia and Aniline in Aqueous Acidic Conditions R. Prakash, B. Tyagi, D. Chatterjee and G. RamachandraiahPolyhedron, Vol.16, 1235-1240, 1997.
  36. Structure of Tris-(dimethylglyoxime)ruthenium(II)dichloride M. M. Taqui Khan, K. Venkatasubramanian, S. H. R. Abdi, M. M. Bhadbhade and B.Tyagi Acta Cryst., C48, 1402-1405, 1992.

 CHAPTERS IN BOOKS:

  1. Solid Acid Catalysts for Cleaner Industrial Alkylation Processes  Beena Tyagi, Raksh V. Jasra and N. V. Choudary in Catalysts in hydrocarbon      processing & fertilizer industry, a compendium, M. A. Siddiqui & R.P. Verma (eds.)   Chap. 4, LKM Trust, New Delhi, 2005.
  2. Sol-Gel Technology for Nano-Materials Synthesis Beena Tyagi*, Kalpesh B. Sidhpuria and Raksh V. Jasra Invited in the edited book, entitled, 'New  Nanotechniques', Ed. A. Malik and R.J. Rawat, Nova Publishers Inc., USA. ISBN: 978-1-60692-516-4, 2009
  3. Nano-materials as Adsorbents and Catalysts in Chemical Process Industry  Beena Tyagi, Kalpesh B. Sidhpuria and Raksh Vir Jasra* in the Encyclopedia of  Nanoscience and Nanotechnology, Ed. H. C. Nalwa, American Scientific Publishers, vol 17, p 479-546, ISBN: 1-58883-166-3, 2011.

   PATENTS

  1.  Green Catalytic Process for the Synthesis of Acetyl Salicylic Acid R.V.Jasra, Beena Tyagi and M.K.Mishra US  7,544,831 B2, Aug, 2009
  2. Catalysed acylation of alkylated benzene derivatives R. V Jasra, B.Tyagi and Y. M. Badheka US 7,087,791 B2, Aug, 2006 
  3. Catalytic Process for the Preparation of Isolongifolene Raksh. V. Jasra, Beena Tyagi and Manish. K. Mishra US 7,132,582 B2 , Nov, 2006 Korea 0674626, Jan, 2007 India195 683, April, 2006  JP 4,468,891, 2009
  4.  A Process for Preparation of Sulfated Zirconia Catalyst R.V.Jasra, Beena Tyagi and M.K.Mishra Indian Patent No.- 1530/DEL/2003, published  28th July, 2006  Patent Appl. Filed for PCT  

PAPERS/POSTERS PRESENTED IN SEMINAR

  1. Contributions of Mm. Marie Curie and other women to chemistry Beena Tyagi, Invited talk at workshop for IYC 2011 and National Science Day, organized by UGC, held at PSSHDA College, Kadi, Feb 28, 2011. (Theme: contribution to well- beings for mankind)
  2. Nano-crystalline sulfated zirconia for esterification of caprylic acid with short chain alcohols K. Saravanan, Beena Tyagi, H.C. Bajaj Poster presented in XXV Gujarat science Congress, organized by Gujarat Science City and Gujarat Science Academy held at Gujarat Science City, Ahmedabad, Feb 26-27, 2011. (Theme: Chemistry- in the service of society)
  3. Green synthesis of fine chemicals by sulfated zirconia solid acid catalyst Beena Tyagi and H.C. Bajaj Poster presented in National Conference of scientific and technical awareness in Hindi, held at IPR, Gandhinagar, Jan 27-28, 2011. (Selected for Second Prize)
  4. Solvent free condensation of acetophenone to dypnone over nano-crystalline sulfated zirconia catalyst K. Saravanan, Beena Tyagi, H.C. Bajaj Presented in 20th National Symposium on Catalysis for energy conversion and conservation of environment, organized by Catalysis Society of India held at IIT Madras,     Dec 19-22, 2010
  5. Liquid phase epoxidation of styrene with molecular O2 over Sulfated Co-Y-ZrO2 solid catalyst under microwave and thermal heating Basha Shaik, Beena Tyagi*and H.C. Bajaj       Presented in National symposium on Emerging Horizons in Catalysis, M.S. Univ. Vadodara and The Catalysis Society of India, Baroda Chapter, held at Dept.of Chem. M.S. Univ.Vadodara, Sept. 25-26, 2009
  6. Solvent free isomerization of α-pinene using zirconia-silica mixed oxides Kalpesh B. Sidhpuria, B. Tyagi * and R. V. Jasra*      Presented in National symposium on Emerging Horizons in Catalysis, M.S. Univ. Vadodara and The Catalysis Society of India, Baroda Chapter, held at Dept.of Chem. M.S. Univ.Vadodara, Sept. 25-26, 2009.
  7. Nano-Crystalline Solid Acid Catalysts Beena Tyagi, presented in Hindi seminar series of DIMC, Aug 20, 2008.
  8. Attended the National Workshop on Nanoscience & Nanotechnology in the Context of    Physics at Bhavnagar University, Bhavnagar, Aug, 2008.
  9. Synthesis of nano-crystalline zirconia using sol-gel technique Basha Sheik, Beena Tyagi* and R.V. Jasra* Oral presentation in XXII Gujarat Science Congress, organized by Gujarat Science Academy, Ahmadabad and Bhavnagar University at Bhavnagar University, Bhavnagar, March 2008.
  10. Effect of Si/Zr molar ratio and sulfation on physico-chemical properties of SiO2 -ZrO2mixed oxides Kalpesh B. Sidhpuria, Beena Tyagi* and R.V. Jasra* Oral presentation in XXII Gujarat Science Congress, organized by Gujarat Science Academy, Ahmadabad and Bhavnagar University at Bhavnagar University, Bhavnagar, March 2008
  11. Mg-Al-hydrotalcite with varied intercalated anions Ulka Sharma, Beena Tyagi and R.V. Jasra* Oral presentation in XXII Gujarat Science Congress, organized by Gujarat Science Academy, Ahmadabad and Bhavnagar University at Bhavnagar University, Bhavnagar, March 2008
  12. Synthesis of Tetragonal Zirconia by Cation dopants using Sol-Gel and PrecipitationTechniques Basha Shaik, Beena Tyagi, R. V. Jasra Poster presented in 5th All Gujarat Research Scholars Meet (AGRSM), Indian Chemical Society Vadodara Chapter at Dept. of Chemistry, M.S.Univ. Vadadara, Feb 2008.
  13. Isomerization of Longifolene to Tetralene derivative over Nano-Crystalline Sulfated-Zirconia Beena Tyagi, Manish K. Mishra and Raksh V. Jasra Poster presented in 18th National Symposium & Indo-US Seminar on Catalysis held at      Indian Institute of Petroleum, Dehradun, India during April 16-18, 2007.
  14. 4-Methyl-2-Pentanol Dehydration over SiO2-ZrO2 Mixed Oxide Xerogel and  Aerogel Prepared by Sol-Gel Technique Beena Tyagi, Kalpesh B. Sidhpuria and Raksh Vir Jasra Poster presented in 18th National Symposium & Indo-US Seminar on Catalysis held at Indian Institute of Petroleum, Dehradun, India during April 16-18, 2007.
  15. Hydrotalcite for CO2 adsorptionBeena Tyagi, Ulka Sharma and Raksh Vir Jasra Poster presented in 18th National Symposium & Indo-US Seminar on Catalysis held at Indian Institute of Petroleum, Dehradun, India during April 16-18, 2007.
  16. Single Step, Solvent Free Synthesis of 7-Substituted 4-Methyl Coumarins Over Nano- Crystalline Sulfated Zirconia Catalyst Beena Tyagi, Manish K. Mishra and Raksh V. Jasra Poster presented in International Conference on Materials for the Millennium (MatCon-2007) held at Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India during March 1-3, 2007.
  17. Synthesis and Characterization of SiO2-ZrO2 Mixed Oxides Xerogel And Aerogel Prepared By Sol-Gel TechniqueBeena Tyagi, Kalpesh B. Sidhpuria and Raksh Vir Jasra Poster presented in International Conference on Materials for the Millennium (MatCon-2007) held at Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India during March 1-3, 2007.
  18. Synthesis and Characterization of Mg-Al-Hydrotalcite Beena Tyagi, Ulka Sharma and Raksh Vir Jasra Poster presented at 9th CRSI National Symposium in Chemistry (NSC-9) Department of Chemistry, University of Delhi, February 1-4, 2007.
  19. Single step, Solvent free, Green Catalytic route for Coumarin synthesis using Nano-crystalline Sulfated Zirconia  Beena Tyagi, Manish K. Mishra and Raksh V. Jasra, Paperfor an oral presentation at the International Conference on Green Chemistry organized by MCC 2006 to be held at Kuala Lumpur, Malaysia, September 19-21, 2006
  20. Nano-crystalline Nano-porous Zirconia using Supercritical Drying Beena Tyagi, Kalpesh Sidhpuria, Basha Shaik and Raksh Vir Jasra Paper for presentation in 4th All Gujarat Research Scholars Meet (AGRSM), Indian Chemical Society Vadodara Chapter at Dept. of Chemistry, M.S.Univ. Vadadara, Jan 2006.
  21. Greener Route for Isomerisation of Longifolene to Iso-longifolene using nano-crystallinesulphated zirconia solid acid catalyst Beena Tyagi, Manish K. Mishra and Raksh V. Jasra Paper for presentation in 4th All Gujarat Research Scholars Meet (AGRSM), Indian Chemical Society Vadodara Chapter at Dept. of Chemistry, M.S.Univ. Vadadara, Jan      2006
  22. Effect of Supercritical Drying on Nano-Crystalline Zirconia Beena Tyagi, Kalpesh Sidhpuria, Basha Shaik and Raksh Vir Jasra Poster for presentation in Modern Trends in Inorganic Chemistry (MTIC)-IX-at IIT Delhi, Dec. 7-9, 2005.
  23. Surfactant Assisted Synthesis of Nanoporous, Nano-crystalline Inorganic Solids Beena Tyagi and R. V. JasraLecture delivered at National Seminar on Polymers, Surfactants & Gels organized at Department of Chemistry, Faculty of Science, M.S.University of Baroda, Vadodara, March 11-13, 2005.
  24. Synthesis and Characterization of Surfactant Assisted Nano- Crystalline Zirconia B.Tyagi, C. Khatri and R. V. Jasra    Poster presentation at 17th National Symposium on Catalysis at CSMCRI, Bhavnagar, January 18-20, 2005.
  25. Nitration of o-Xylene using Rare Earth Cation Exchanged Zeolite-b as Solid Acid Catalyst V. N. Sheemol, B.Tyagi and R. V. Jasra Poster presentation at 17th National Symposium on Catalysis at CSMCRI, Bhavnagar, January 18-20, 2005.
  26. Nano-Crystalline Zirconia using Sol-Gel Technique Beena Tyagi, Manish K. Mishra and Raksh V. Jasra Paper for presentation in Seminar on Nanomaterial & Nanotechnology at Material Science Department, S. P. University, V. V. Nagar, March, 11- 12, 2005.
  27. Structural and Textural properties of Nano-Crystalline Sulfated Zirconia prepared by Sol-gel technique at different pH M. K. Mishra, B. Tyagi and R. V. Jasra Poster presentation in 10th symposium on Modern Trends in Inorganic Chemistry   (MTIC) at IIT, Mumbai, on December 15-17, 2003.
  28. Synthesis and Characterization of Nano-Crystalline Sulfated Zirconia  by Sol-gel method M. K. Mishra, B. Tyagi and R. V. Jasra Paper for presentation in 16th National Symposium and Ist Indo-German Conference on Catalysis at IICT, Hyderabad, Catalysis Society of India on Februry 6-8, 2003.
  29. Nano-Crystalline Sulfated Zirconia for Catalytic Acylation of Anisole M. K. Mishra, B. Tyagi and R. V. Jasra  Paper for presentation in 3rd All Gujarat Research Scholars Meet (AGRSM), Indian Chemical Society Vadodara Chapter at Dept. of Chemistry, M.S. Univ. February 23rd, 2003.
  30. Nitration of o-Xylene with Solid Acid Catalysts Y. M. Badheka, B. Tyagiand R. V.Jasra Paper for presentation in 3rd All Gujarat Research Scholars Meet (AGRSM), Indian           Chemical Society Vadodara Chapter at Dept. of Chemistry, M.S.Univ. February 23rd, 2003.
  31. Correlation of Synthetic Strategy with Structural and Textural features of Sulfated Zirconia B. Tyagi,M. K. Mishra,and R. V. Jasra Paper for presentation in National Symposium on New Horizons in Heterogenous Catalysis at Centre of Advanced Study, Banaras Hindu University, Varanasi on Februry 21-23, 2002
  32. Surface modification and pore engineering of zeolites for developing O2, N2  and Ar selective adsorbents Jince Sebastian, C. D. Chudasama, B. Tyagi and R. V. Jasra Poster presentation in MTIC held at Kolkatta, 2002
  33. Homo and Heterodinuclear Complexes of Ru(II) and Os(II) With Polypyridyl  Spacer:Synthesis, Characterisation, Electrochemical and Photophysical Studies A.K. Bilakhiya, B. Tyagi, and P. Paul Paper accepted for poster presentation in 34th International Conference on Coordination Chemistry (ICCC-34) at University of Edinburgh, Scotland, UK, between 9-14 July, 2000.
  34. Dinuclear ruthenium(II) and/or osmium(II) complexes of bipyridyl ligands bridged by rigid spacers: Synthesis, electrochemical behaviour, absorption spectra and luminescence  properties A. K. Bilakhiya, B. Tyagi, and P. Paul Presented in the symposium onModern Trends in Inorganic Chemistry (MTIC) at IISc.,   Bangalore during January 18-20, 2000
  35. Metal-Induced Unusal Hydroxylation at the Triazine Ring in the Dinuclear Complexes of Ru (II) and Os (II), Bridged by 2,4,6-Tris(2-pyridyl)-1,3,5-Triazine B. Tyagi, A. K. Bilakhiya, P. Dastidar, E. Suresh and P. Paul* Presented in National        Symposium on University-Industry Interactionorganised by Dept. of Chemistry, Saurashtra University, Rajkot on March 27-28, 1999.
  36. Homo and Hetero Dinuclear Complexes of Ru(II) and Os(II) With Polypyridyl Spacers: Synthesis, Characterisation, Electrochemical and Photophysical Studies Parimal Paul, A. K. Bilakhiya,  and  B. Tyagi Presented in "Ultrafast Processes in Biology, Chemistry and Physics" organised by   National Centre for Ultrafast Processes (NCUFP), Dept. of Chemistry,Chennai on  March11-13, 1999
  37. Synthesis and Characterisation of Rh(III) Complexes and their use in Electrocatalytic   Reduction  of  Carbon  Dioxide A. K. Bilakhiya, B. Tyagi,  M. M. Bhadbhade,  E. Suresh  and P. Paul Presented in First All Gujarat Research Scholars Meet (FAGRSM-98), at Vadodara, on December 6, 1998
  38. Stable Rhodium (II) Polypyridyl Complexes: Synthesis, Spectroscopic and Structural. Characterisation P. Paul, B. Tyagi, A. K. Bilakhiya,  M. M. Bhadbhade  and E. Suresh.    Presented in Frontier in Inorganic Chemistry at IISc., Bangalore during July 8-10, 1998
  39. Synthesis, Characterisation, Electrochemical and Photophysical Studies of Homo/Hetero Dinuclear Complexes of Ru(II) and Os(II) with New Dinucleating Spacers Having Complete Conjugations Between the Chromophores A.K. Bilakhiya, B. Tyagi  and  P. Paul Presented in National Seminar on Metalloorganics at IIT- Madras, Chennai during 20-21st February, 1998
  40. Metal-Induced Hydrolysis of 2,4,6-triaryltriazine; Synthesis, Characterisation and Potential use of the New Complexes in Electrocatalytic Reduction of Carbon Dioxide P. Paul, B. Tyagi, A. K. Bilakhiya,  M. M. Bhadbhade  and E. Suresh. Presented in the Symposium onModern Trends in Inorganic Chemistry at IIT- Kanpur, during December 4-6, 1997.
  41. Electrometric Study on the Reduction of N-N Bond of Metal Bound Hydrazine to Ammonia in Aqueous Solutions B. Tyagi, R. Prakash, R. Rangarajan and G. Ramachandraiah Presented in 65th Annual Session of the National Academy of Sciences, India, held at      S.V. University, Tirupati, A. P., Nov. 3-5, 1995.
  42. The Durability of Makrana Marble Stone M. Rai,. G. S. Mehrotra, D. Chandra, B. Tyagi Presented in XIth International Congress, Quality for Building Users Throughout the World, Theme II, Vol. II, CIB 89,19-23 June 1989
  43. Decay and Preservation of Sandstone B. Tyagi, S. Bhan, D. Chandra, G. S. Mehrotra, M. Rai Presented in First International Congress Organization and Secretariat French Association of Research and Testing for Materials and Structure, Paris, 7-11, Sept 1987 

Ph.D. Supervision