Efficient volatile metal removal from low rank coal in gasification, combustion, and processing systems and methods

Title: Efficient volatile metal removal from low rank coal in gasification, combustion, and processing systems and methods

Efficient coal pre-processing systems (69) integrated with gasification, oxy-combustion, and power plant systems include a drying chamber (28), a volatile metal removal chamber (30), recirculated gases, including recycled carbon dioxide (21), nitrogen (6), and gaseous exhaust (60) for increasing the efficiencies and lowering emissions in various coal processing systems.

Inventors:: Bland, Alan E.; Sellakumar, Kumar Muthusami; Newcomer, Jesse D.

Issue Date:: 2017-03-21

OSTI Identifier:: 1347585

Assignee:: The University of Wyoming Research Corporation NETL

Patent Number(s):: 9,598,653

Application Number:: 14/934,459

Contract Number:: FC26-98FT40322; FC26-98FT40323

Resource Relation:: Patent File Date: 2015 Nov 06

Research Org:: The University of Wyoming Research Corporation, Laramie, WY (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS

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Carbonaceous material with high characteristics of surface area and activity and process for producing the same
patent, February 1979

Palumbo, Luigi; Colletta, Angelo
US Patent Document 4,139,416
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4139416

Method for producing SNG or SYN-gas from wet solid waste and low grade fuels
patent, February 1981

Othmer, Donald F.
US Patent Document 4,251,227
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4251227

Desulfurization of coal
patent, May 1982

Othmer, Donald F.
US Patent Document 4,329,156
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4329156

Production of demercurized synthesis gas, reducing gas, or fuel gas
patent, September 1989

Suggitt, Robert M.
US Patent Document 4,863,489
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4863489

Method and apparatus for upgrading carbonaceous fuel
patent, March 1994

Koppelman, Edward
US Patent Document 5,290,523
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5290523

Process for clean-burning fuel from low-rank coal
patent, June 1994

Merriam, Norman W.; Sethi, Vijay; Brecher, Lee E.
US Patent Document 5,322,530
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5322530

Process and device for drying solid materials in an indirectly heated fluidized bed
patent, December 1994

Wolf, Bodo
US Patent Document 5,373,648
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5373648

Process for low mercury coal
patent, April 1995

Merriam, Norman W.; Grimes, R. William; Tweed, Robert E.
US Patent Document 5,403,365
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5403365

Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock
patent, November 1996

Groombridge, Clifton E.
US Patent Document 5,575,085
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5575085

Process for treating carbonaceous materials
patent, May 1998

Koppelman, Edward
US Patent Document 5,746,787
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5746787

Method and apparatus for reducing the by-product content of carbonaceous materials
patent, June 1998

Koppelman, Edward
US Patent Document 5,769,908
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5769908

Process for processing coal
patent, November 1998

Dunlop, Donald D.
US Patent Document 5,830,246
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5830246

Process for processing coal
patent, November 1998

Dunlop, Donald D.
US Patent Document 5,830,247
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5830247

Process for processing coal
patent, January 1999

Dunlop, Donald D.
US Patent Document 5,858,035
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5858035

Stabilized thermally beneficiated low rank coal and method of manufacture
patent, January 1999

Viall, Arthur J.; Richards, Jeff M.
US Patent Document 5,863,304
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5863304

Process for processing coal
patent, May 1999

Dunlop, Donald D.; Kenyon, Jr., Leon C.
US Patent Document 5,904,741
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5904741

Process for drying and solvent-extraction of water wet solids
patent, November 1999

Holcombe, Thomas C.; Trowbridge, Theodore D.
US Patent Document 5,987,776
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5987776

Device and process for the aerobic treatment of organic substances
patent, May 2000

Eigner, Erich
US Patent Document 6,065,224
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6065224

Process and an apparatus for producing a powdered product by spin flash drying
patent, July 2000

Getler, Jens
US Patent Document 6,085,44
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6085440

Stabilized thermally beneficiated low rank coal and method of manufacture
patent, July 2000

Viall, Arthur J.; Richards, Jeff M.
US Patent Document 6,090,171
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6090171

Cleaning apparatus with electromagnetic drying
patent, August 2000

Ramsey, Michael; Summerfield, John W.
US Patent Document 6,098,306
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6098306

Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion
patent, November 2000

Ochs, Thomas L.; Sands, William D.; Schroeder, Karl
US Patent Document 6,146,432
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6146432

Process for processing coal
patent, December 2000

Dunlop, Donald D.; Kenyon, Jr., Leon C.
US Patent Document 6,162,265
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6162265

Enhanced heat transfer system
patent, February 2001

Conochie, David Stewart
US Patent Document 6,185,841
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6185841

Method and apparatus for heat transfer
patent, June 2001

Conochie, David S.; Greenwood, Mark J.
US Patent Document 6,249,989
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6249989

Liquid/gas/solid separation vessel apparatus
patent, July 2001

Conochie, David Stewart
US Patent Document 6,266,894
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6266894

Process for removing water from fibrous web using oscillatory flow-reversing air or gas
patent, October 2001

Stipp, Gordon Keith
US Patent Document 6,308,436
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6308436

Process to improve boiler operation by supplemental firing with thermally beneficiated low rank coal
patent, December 2001

Sheldon, Ray W.
US Patent Document 6,325,001
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6325001

Combination air separation and steam-generation processes and plants therefore
patent, May 2003

Marin, Ovidiu; Penfornis, Erwin
US Patent Document 6,568,185
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6568185

Stabilizing thermally beneficiated carbonaceous material
patent, April 2005

Conochie, David Stewart
US Patent Document 6,878,174
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6878174

Boiler improvements with oxygen-enriched combustion for increased efficiency and reduced emissions
patent, June 2005

Krebs, William P.
US Patent Document 6,907,845
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6907845

Process to recover energy from hot gas
patent, February 2006

Dries, Hubertus Wilhelmus Albertus; Ekker, Andreas; Wesker, Evert
US Patent Document 6,996,989
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F6996989

Oxygen-based biomass combustion system and method
patent, March 2006

Abrams, Stan E.; Culvey, Brian
US Patent Document 7,007,616
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7007616

Power generation methods and systems
patent, March 2006

Ruggieri, Frank; Lackstrom, Dave; Salvail, Napoleon P.
US Patent Document 7,019,412
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7019412

Integrated heat recovery systems and methods for increasing the efficiency of an oxygen-fired furnace
patent, June 2006

Penfornis, Erwin; Marin, Ovidiu; Leroux, Bertrand
US Patent Document 7,062,912
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7062912

Method and apparatus for enhanced heat recovery from steam generators and water heaters
patent, June 2006

Knight, Richard A.; Rabovitser, Iosif K.; Wang, Dexin
US Patent Document 7,066,396
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7066396

Sorbent for separation of carbon dioxide (CO.sub.2) from gas mixtures
patent, June 2006

Fan, Liang-Shih; Gupta, Himanshu
US Patent Document 7,067,456
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7067456

Apparatus and method of separating and concentrating organic and/or non-organic material
patent, October 2007

Ness, Mark A.; Coughlin, Matthew P.
US Patent Document 7,275,644
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7275644

Oxy-fuel combustion process
patent, December 2007

Zeng, Yongxian; Acharya, Divyanshu R.; Tamhankar, Satish S.
US Patent Document 7,303,606
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7303606

Apparatus and method of separating and concentrating organic and/or non-organic material
patent, June 2009

Ness, Mark A.; Coughlin, Matthew P.; Levy, Edward K.
US Patent Document 7,540,384
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7540384

System of the chemical engineering processes generating energy and utilizing municipal solid waste or a carbon content material mixture
patent, June 2012

Rokhvarger, Anatoliy; Boyko, Vladimir
US Patent Document 8,197,565
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8197565

System and method for preparation of solid biomass by torrefaction
patent, December 2012

Causer, Thomas P.
US Patent Document 8,322,056
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8322056

Method of enhancing the quality of high-moisture materials using system heat sources
patent, November 2013

Bullinger, Charles W.; Ness, Mark A.; Sarunac, Nenad
US Patent Document 8,579,999
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8579999

Method for the elimination of the atmospheric release of carbon dioxide and capture of nitrogen from the production of electricity by in situ combustion of fossil fuels
patent, July 2014

Das, Subodh
US Patent Document 8,776,518
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8776518

System and method for recovering turpentine during wood material processing
patent, September 2014

Foxen, Robert J.
US Patent Document 8,832,964
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8832964

Apparatus and methods for drying material
patent, December 2014

Shan, Ping; Guo, Weihua
US Patent Document 8,898,927
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8898927

Process for drying material and dryer for use in the process
patent, April 2015

Carnegie, Roderick Howard; Cooper, Brendon Gerrard; Stevens, William John
US Patent Document 8,997,376
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8997376

Fuel preprocess system for coal combustion boiler
patent, April 2015

Kim, Dong-Won; Lee, Jong-Min; Kim, Young-Joo
US Patent Document 9,003,675
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F9003675

Efficient low rank coal gasification, combustion, and processing systems and methods
patent, November 2015

Bland, Alan E.; Sellakumar, Kumar Muthusami; Newcomer, Jesse D.
US Patent Document 9,181,509
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F9181509

Curing systems for materials that consume carbon dioxide and method of use thereof
patent, December 2015

Kuppler, John P.; Atakan, Vahit; Smith, Kenneth
US Patent Document 9,221,027
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F9221027

Method for removing liquid membrane using high-speed particle beam
patent, October 2016

Kim, In Ho; Lee, Jin Won
US Patent Document 9,476,642
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F9476642

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Removal of oxides of nitrogen from gases in multi-stage coal combustion

Patent Mollot, Darren J. ; Bonk, Donald L. ; Dowdy, Thomas E.

Polluting NO.sub.x gas values are removed from off-gas of a multi-stage coal combustion process which includes an initial carbonizing reaction, firing of char from this reaction in a fluidized bed reactor, and burning of gases from the carbonizing and fluidized bed reactions in a topping combustor having a first, fuel-rich zone and a second, fuel-lean zone. The improvement by means of which NO.sub.x gases are removed is directed to introducing NO.sub.x -free oxidizing gas such as compressor air into the second, fuel-lean zone and completing combustion with this source of oxidizing gas. Excess air fed to the fluidized bed reactormore »« less
Full Text Available January 1998