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Sorbent enhanced steam reforming (SESR) of methane using dolomite as internal carbon dioxide absorbent: Limitations due to Ca(OH)2 formation

Paper ID Volume ID Publish Year Pages File Format Full-Text
44541 46038 2006 7 PDF Available
Title
Sorbent enhanced steam reforming (SESR) of methane using dolomite as internal carbon dioxide absorbent: Limitations due to Ca(OH)2 formation
Abstract

High hydrogen yields can be obtained by sorbent enhanced steam reforming (SESR) of methane at temperatures below 600 °C by using calcined dolomite as internal sorbent together with a Ni/NiAl2O4 catalyst in a fluidized bed reactor. Effluent gas compositions containing >90 mole.% H2 are obtained, indicating that the sorbent acts efficiently after an induction period with low methane conversion. XRD examination of the catalyst/sorbent powder after different times-on-stream shows that during the induction period, CaO of the calcined dolomite reacts with water vapor to form Ca(OH)2. The induction period is directly proportional to the time the catalyst/sorbent mixture is in contact with steam at temperatures below 600 °C where Ca(OH)2 is thermodynamically stable. The catalyst/sorbent mixture can be regenerated at temperatures above 800 °C in H2/N2/H2O atmosphere.

Keywords
Hydrogen production; Natural gas; Sorbent enhanced steam reforming; Dolomite; Nickel catalyst; Fluidized bed reactor
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Sorbent enhanced steam reforming (SESR) of methane using dolomite as internal carbon dioxide absorbent: Limitations due to Ca(OH)2 formation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 303, Issue 1, 18 April 2006, Pages 131–137
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us