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Comparative Study of Commercial Silica and Sol-Gel-Derived Porous Silica from Cornhusk for Low-Temperature Catalytic Methane Combustion

Affiliation
Department of Thermochemical Conversion, DBFZ—Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;(S.F.);(M.E.);(M.N.)
Owusu Prempeh, Clement;
Affiliation
Department of Thermochemical Conversion, DBFZ—Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;(S.F.);(M.E.);(M.N.)
Hartmann, Ingo;
Affiliation
Department of Thermochemical Conversion, DBFZ—Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;(S.F.);(M.E.);(M.N.)
Formann, Steffi;
Affiliation
Department of Thermochemical Conversion, DBFZ—Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;(S.F.);(M.E.);(M.N.)
Eiden, Manfred;
ORCID
0009-0007-0301-8811
Affiliation
Leibniz-Institute for Catalysis e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany;(K.N.);(H.A.);(A.W.);(S.W.)
Neubauer, Katja;
Affiliation
Leibniz-Institute for Catalysis e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany;(K.N.);(H.A.);(A.W.);(S.W.)
Atia, Hanan;
Affiliation
Leibniz-Institute for Catalysis e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany;(K.N.);(H.A.);(A.W.);(S.W.)
Wotzka, Alexander;
Affiliation
Leibniz-Institute for Catalysis e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany;(K.N.);(H.A.);(A.W.);(S.W.)
Wohlrab, Sebastian;
Affiliation
Department of Thermochemical Conversion, DBFZ—Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;(S.F.);(M.E.);(M.N.)
Nelles, Michael

The synthesis and characterization of sol-gel-derived cornhusk support for low-temperature catalytic methane combustion (LTCMC) were investigated in this study. The prepared cornhusk support was impregnated with palladium and cerium oxide (Pd/CeO 2 ) via the classical incipient wetness method. The resulting catalyst was characterized using various techniques, including X-ray diffraction (XRD), N 2 physisorption (BET), transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H 2 -TPR). The catalytic performance of the Pd/CeO 2 /CHSiO 2 catalyst was evaluated for methane combustion in the temperature range of 150–600 °C using a temperature-controlled catalytic flow reactor, and its performance was compared with a commercial catalyst. The results showed that the Pd/CeO 2 dispersed on SiO 2 from the cornhusk ash support (Pd/CeO 2 /CHSiO 2 ) catalyst exhibited excellent catalytic activity for methane combustion, with a conversion of 50% at 394 °C compared with 593 °C for the commercial silica catalyst (Pd/CeO 2 /commercial). Moreover, the Pd/CeO 2 /CHSiO 2 catalyst displayed better catalytic stability after 10 h on stream, with a 7% marginal loss in catalytic activity compared with 11% recorded for the Pd/CeO 2 /commercial catalyst. The N 2 physisorption and H 2 -TPR results indicated that the cornhusk SiO 2 support possessed a higher surface area and strong reducibility than the synthesized commercial catalyst, contributing to the enhanced catalytic activity of the Pd/CeO 2 /SiO 2 catalyst. Overall, the SiO 2 generated from cornhusk ash exhibited promising potential as a low-cost and environmentally friendly support for LTCMC catalysts.

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Editor:
Araujo, Antonio S.
Published in:
Nanomaterials  
Vol. 13, No. 9 (24.04.2023)
Volume:
13
No.:
9
Date Issued:
24.04.2023
DOI:
10.3390/nano13091450
Language:
English
Type of Resource:
Text
Keywords:
sol-gel; cornhusk; support material; biogenic silica; low-temperature catalytic methane combustion; Pd/CeO 2; characterization
DDC subject of DNB:
610 Medical sciences Medicine

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