Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier

Siriwardane, Ranjani; Benincosa, William; Riley, Jarrett; Tian, Hanjing; Richards, George

doi:10.1016/j.apenergy.2016.09.045

Title: Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier

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Abstract

This paper presents data on conversion of two different coals with a chemical looping oxygen carrier, CuO-Fe₂O₃-alumina, and over a range of conditions including steam and various levels of reduction of the oxygen carrier. Reactions of coal/steam/CuO-Fe₂O₃-alumina oxygen carrier and coal/steam/partially reduced CuO-Fe₂O₃-alumina oxygen carrier were investigated with Wyodak coal and Illinois #6 coal in a fluidized bed reactor. Temperature programmed reaction studies indicated that the oxygen carrier enhanced the steam gasification/combustion rates of both coals. Rates of gasification/combustion were higher with Wyodak coal (sub bituminous) than that with Illinois #6 coal (bituminous). In addition to the increase in reaction rates, the total moles of carbon that were gasified and combusted from coal/steam increased in the presence of the oxygen carrier. The reduced oxygen carrier promoted the water-gas shift reaction when reacted with synthesis gas in the presence of steam, but the reverse water gas shift reaction was observed when steam was not present. The partially reduced oxygen carrier enhanced the production of H₂ from coal/steam, which was different from the observations with un-reduced oxygen carrier. Water splitting reaction to produce H₂ was also observed with the reduced oxygen carrier. CuO-Fe₂O₃-alumina reacted with coal during the temperature ramp to 850more »« less

Authors:

Siriwardane, Ranjani ^[1]; Benincosa, William ^[2]; Riley, Jarrett ^[3]; Tian, Hanjing ^[3]; Richards, George ^[1]

National Energy Technology Lab. (NETL), Morgantown, WV (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States); Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States)

Publication Date:: Thu Oct 06 00:00:00 EDT 2016

Research Org.:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1400236

Alternate Identifier(s):: OSTI ID: 1397048

Report Number(s):: NETL-PUB-20596
Journal ID: ISSN 0306-2619; PII: S0306261916313472

Resource Type:: Accepted Manuscript

Journal Name:: Applied Energy

Additional Journal Information:: Journal Volume: 183; Journal Issue: C; Journal ID: ISSN 0306-2619

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; Reactions in chemical looping combustion of coal; Chemical looping combustion of coal; Oxygen carrier; Coal gasification; Fluidized bed; Chemical looping combustion reactions; Coal volatiles

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                    Siriwardane, Ranjani, Benincosa, William, Riley, Jarrett, Tian, Hanjing, and Richards, George. Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier.  United States: N. p., 2016. 
Web.  doi:10.1016/j.apenergy.2016.09.045.

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                    Siriwardane, Ranjani, Benincosa, William, Riley, Jarrett, Tian, Hanjing, & Richards, George. Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier.  United States.  https://doi.org/10.1016/j.apenergy.2016.09.045

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                    Siriwardane, Ranjani, Benincosa, William, Riley, Jarrett, Tian, Hanjing, and Richards, George. Thu .  
"Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier".  United States.  https://doi.org/10.1016/j.apenergy.2016.09.045.  https://www.osti.gov/servlets/purl/1400236.

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@article{osti_1400236,

  title        = {Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier},

  author       = {Siriwardane, Ranjani and Benincosa, William and Riley, Jarrett and Tian, Hanjing and Richards, George},

  abstractNote = {This paper presents data on conversion of two different coals with a chemical looping oxygen carrier, CuO-Fe2O3-alumina, and over a range of conditions including steam and various levels of reduction of the oxygen carrier. Reactions of coal/steam/CuO-Fe2O3-alumina oxygen carrier and coal/steam/partially reduced CuO-Fe2O3-alumina oxygen carrier were investigated with Wyodak coal and Illinois #6 coal in a fluidized bed reactor. Temperature programmed reaction studies indicated that the oxygen carrier enhanced the steam gasification/combustion rates of both coals. Rates of gasification/combustion were higher with Wyodak coal (sub bituminous) than that with Illinois #6 coal (bituminous). In addition to the increase in reaction rates, the total moles of carbon that were gasified and combusted from coal/steam increased in the presence of the oxygen carrier. The reduced oxygen carrier promoted the water-gas shift reaction when reacted with synthesis gas in the presence of steam, but the reverse water gas shift reaction was observed when steam was not present. The partially reduced oxygen carrier enhanced the production of H2 from coal/steam, which was different from the observations with un-reduced oxygen carrier. Water splitting reaction to produce H2 was also observed with the reduced oxygen carrier. CuO-Fe2O3-alumina reacted with coal during the temperature ramp to 850 °C even in the absence of steam due to the chemical-looping oxygen uncoupling (CLOU) reaction. Here, the fourier transform infra-red (FTIR) analysis indicated the presence of volatile aromatics during the temperature ramp and these may have also contributed to the reactions with the oxygen carrier in the absence of steam. Increasing steam concentration had a negative effect on the CLOU reaction.},

  doi          = {10.1016/j.apenergy.2016.09.045},

  journal      = {Applied Energy},

  number       = C,

  volume       = 183,

  place        = {United States},

  year         = {Thu Oct 06 00:00:00 EDT 2016},

  month        = {Thu Oct 06 00:00:00 EDT 2016}

}

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