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Dr. W. Khan has also published numerous articles that contribute to modern knowledge.
Here is a list of selected publications:

Papers Published/Accepted in Refereed Journals:

  1. W. Z. Khan and B.M. Gibbs, “The Influence of Air Staging in the Reduction of SO2 by Limestone in a Fluidized-Bed Combustor”, FUEL, 74, pp. 800-805, June 1995.
  2. W.Z. Khan, N. A. Quraishi and S. Azharuddin, “Evaluation of a Suitable Desalination Process for Bulk Water Supply to Karachi”, VISION, An International Quarterly Journal of the Commission on the Science & Technology for Sustainable Development in the South (COMSATS), Islamabad, Pakistan, Vol. 1, No. 2, pp. 41-50, Oct.  1995.
  3. W.Z. Khan, and B.M. Gibbs, “The Effects of Particle Size on SO2 Retention in a Fluidized –Bed Combustor under unstaged Conditions”, The International Journal of Environmental Studies, Vol. 49, pp. 53-65, 1995.
  4. W.Z. Khan and B.M. Gibbs, “SO2 Emission from a Fluidized-Bed Combustor with and Without Limestone Addition”, Energy-The International Journal, Vol. 21, No. 2, pp. 105-113, February 1996.
  5. W.Z. Khan and B.M. Gibbs, “Reduction of SO2 Emissions by Ammonia Gas during unstaged Combustion”, Environmental Monitoring and Assessment, 40:2, pp.157-170, February 1996.
  6. W.Z. Khan and E.Z. Hamad, “Performance of Polyamide Hollow Fibre Reverse Osmosis Membrane Subjected to High Salinity Water”, Desalination The International Journal on the Science & Technology of Desalting and Water Purification, Vol. 105, No. 3, pp. 119-198, 1996.
  7. W.Z. Khan and B.M. Gibbs, “An approach to Estimate Depth of Oxidizing and Reducing Regions in Fluidized-Bed Combustor under Staged Combustion”, FUEL, Vol. 75, No. 7, pp. 899-906, May 1996.
  8. W.Z. Khan, N.A. Quraishi, and S. Azharuddin, “Handcalculation for the Design of a half million gallon per day Reverse Osmosis Desalination plant to desalt Arabian Sea Water”, Science VISION, An International Quarterly Journal of the Commission on the Science & Technology for Sustainable Development in the South (COMSATS), Islamabad, Pakistan, Vol. 2, No. 3, pp. 58-75, 1997.
  9. W.Z. Khan and B.M. Gibbs, “Zero Test Emissions of Sulphur Dioxide from Large Coal under Stage Fluidized-Bed Combustions”, Water, Air and Solid Pollution, Vol. 97/1-4, July 1997.
  10. W.Z. Khan and B.M. Gibbs, “Reduction of SO2 Emissions from a Fluidized-Bed under Staged Combustion by Fine Limestone”, Environment International, Vol. 23, No. 2, 229-236, 1997.
  11. W.Z. Khan, N. A. Qureshi and S. Azharuddin, “An Economic and Engineering Cost Estimation of a million gallon per day Reverse Osmosis Desalination unit”, Science Vision, Vol. 2, No. 4, pp. 57-65, 1997.
  12. W.Z. Khan and B.M. Gibbs, “Reduction of SO2 Emissions by Ammonia Gas during Staged Combustion”, Environmental Monitoring and Assessment, 55: 347 –362, 1999.
  13. W.Z. Khan, S.F. Sibtain and B.M. Gibbs, “Combined Non-Catalytic Reduction of NOx and SO2­ by Ammonia Liquor during Staged Fluidized-Bed Combustion”, Environmental Monitoring and Assessment, 57: 45 – 58, 1999.
  14. W. Z. Khan and B.M. Gibbs, “Reduction of SO2 Emissions from a Fluidized-Bed Combustor under Staged Combustion by Coarse Limestone”, Science Vision, Vol. 3, No. 4, pp. 55-59, 1998.
  15. W.Z. Khan, “Purification of Arabian Gulf High Salinity Water by Aromatic Polyamide Hallow Fibre Membranes”, a chapter in a book “Water Management, Purification and Conservation in Arid Climates”, Vol. 2 of Water Purification Series, Technomic Publishing Company, USA, Edited by Drs. Mattheus F.A. Goosen and Waleed H. Shayya, pp. 267 – 271, 1999.
  16. W.Z. Khan, “Three Stage Purification of Local Raw Water”, a chapter in a book Water Management, Purification and Conservation in Arid Climate, Vol. 2 of Water Purification Series, Edited by Drs. Mattheus F.A. Goosen and Waleed H. Shayya, Technomic Publishing Company, USA, pp. 215 –222, 1999.
  17. W.Z. Khan, “The Applicability of Reverse-Osmosis Technology for Developing Countries”, Science Vision, Vol. 4, No. 2, pp. 7 – 9, 1999.
  18. W.Z. Khan and B.M. Gibbs, “High Temperature Desulphurization by Fine Limestone During Staged Fluidized-Bed Combustion”, The Canadian Journal of Chemical Engineering, Vol.78, No.6, Dec 2000, pp 1102 - 1110
  19. W.Z. Khan, “The Effects of Ammonia on SO2 Emissions in a Fluidized-Bed Combustor under Pseudo-Staged Combustion”, Environmental Monitoring and Assessment, 71: 123-142, October 2001.
  20. W.Z. Khan “Desalination of raw water by a Polyamide Hollow Fibre Membrane”, Desalination, The International Journal on the Science & Technology of Desalting and Water Purification, Vol. 244/1-3, pp. 59-65, 2009.

Papers presented in Conferences:

  1. W. Z. Khan and B.M. Gibbs, “Nitric Oxide Reduction by Ammonia Addition”, 7th Annual Pittsburgh Coal Conference, Pittsburgh, U.S.A., September 10-14, 1990.
  2. W.Z. Khan and B.M. Gibbs, “The Sulphur Dioxide Capture by Limestone at Staged Combustion in a Fluidized-Bed Combustors”, 13th World Energy Congress, Atlanta, Georgia, U.S.A., October 9-12, 1990, pp. 273-278, Chap. 80.
  3. W.Z. Khan and B.M. Gibbs, “The Effect of Staged Combustions on In-Situ Desulphurization by Limestone in a Fluidized-Bed Combustor”, 2nd International Conference on Desulphurization, Sheffield, U.K. March 20-21, 1991, IChE Symp., Sr. # 123, pp. 193-203, 1991.
  4. W.Z. Khan and B.M. Gibbs, “The Effect of Staged Combustion on Sulphur Capture in a Fluidized-Bed Combustor”, 2nd European Conference on Industrial Furnaces and Boilers, Vilamoura-Agave, Portugal, April 2-5, 1991.
  5. W.Z. Khan and B.M. Gibbs, “The Effect of Bed Temperature and Oxygen Stoichiometry on Sulphur Dioxide Capture by Limestone in a Fluidized-Bed Combustor”, 11th International Conference on Fluidized-Bed Combustion, Montreal, Canada, April 21-24, 1991, pp. 1503-1510, Vol. III.
  6. W.Z. Khan and B.M. Gibbs, “The Simultaneous Removal of Nitric Oxide and Sulphur Dioxide by Limestone and Ammonia during unstaged and Staged Fluidized-Bed Combustion”, 11th International Conference on Fluidized-Bed Combustion, Montreal, Canada, April 21-24, 1991, pp. 99-106, Vol. I.
  7. W.Z. Khan and B.M. Gibbs, “Optimization of Combustion Conditions for Removal of Sulphur Oxide and Nitric Oxide from Fluidized-Bed Combustor”, International Coal Science Conference, university of New Castle, Upon Tyne, U.K. September 1991.
  8. W.Z. Khan and B.M. Gibbs, “High Temperature Desulphurization by Fine Limestone during Staged Fluidized-Bed Combustion”, 48th Canadian Chemical Engineering Conference, London, Ontario, Canada, October 4-7, 1998.
  9. W.Z. Khan and B.M. Gibbs, “Freeboard Capture of SO2 Emissions by Premixed Course Limestone During Staged Fluidized-Bed Combustion”, 5th International Conference on Technologies and Combustion  for a Clean Environment, Lisbon, Portugal, July 12 – 15, 1999.
  10. W.Z. Khan and Imad Najeeb, “Assessment of approaches and practices in Waste Management in Karachi-Pakistan”, 1st  International Conference on  Engineering Management-Benchmarking Management Practices in Developing Countries, Mehran University of Engineering and Technology (MUET), Jamshoro, Hyderabad, Pakistan, March 4-5, 2008.
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