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Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability
Author(s) -
Ray Debjyoti,
Nepak Devadutta,
Janampelli Sagar,
Goshal Partha,
Subrahmanyam Ch.
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201801008
Subject(s) - catalysis , syngas , methane , dielectric barrier discharge , yield (engineering) , selectivity , materials science , plasma , dielectric , nonthermal plasma , chemical engineering , carbon dioxide reforming , carbon fibers , base (topology) , inorganic chemistry , analytical chemistry (journal) , chemistry , organic chemistry , metallurgy , composite material , physics , optoelectronics , quantum mechanics , composite number , engineering , mathematical analysis , mathematics
The conversion of greenhouse gases, H 2 and CO selectivity, H 2 /CO ratio, and carbon formation in the dry reforming reaction over Ni‐supported ZSM‐5, Al 2 O 3 , and TiO 2 are tested under thermal, plasma, and plasma–thermal conditions. It is observed that the dielectric nature, specific surface area, and acid‐base properties of the support influence the performance during the DRM reaction. Typical results indicate that the best activity and syngas yield are achieved with 15Ni/Al 2 O 3 under plasma conditions, possibly due to the high dielectric constant and surface area of Al 2 O 3 and nanosize of Ni. In the thermal condition, the highest conversion of 73% and 68% for CH 4 and CO 2 , respectively, is achieved over 15Ni/ZSM‐5 at 500 °C. Plasma‐assisted thermal conditions provide the highest conversion due to the activation of reactants and their partial conversion in the plasma zone before entering into the catalytic zone. The plasma‐assisted thermocatalytic conversions of CH 4 and CO 2 reach the best values of 76% and 71%, respectively, on 15Ni/ZSM‐5. Under the same conditions, 68% and 65% conversion of CH 4 and CO 2 , respectively, is achieved with 15Ni/Al 2 O 3 where the selectivity for H 2 and CO is 45% and 58%, respectively.