Hydrogen Production from Steam Reforming of Acetic Acid as a Model Compound of the Aqueous Fraction of Microalgae HTL Using Co-M/SBA-15 (M: Cu, Ag, Ce, Cr) Catalysts

Megía, Pedro J.; Carrero, A.; Calles, J.A.; Vizcaíno, A.J.

doi:10.3390/catal9121013

Cited by 22 publications

(26 citation statements)

References 85 publications

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“…Garcia et al [34] reported the beneficial effect of Cr addition to Co based catalysts, as a promoter towards hydrogenation-dehydrogenation reactions (i.e., coke precursors hydrogenation). Chromium was also shown to be a textural promoter, reducing the crystallite dimensions and limiting the sintering of the active species [35]; moreover, chromium promoter was shown to better improve the steam reforming activity of rare earth based catalyst compared to other metals [30,36]. Our previous work [37] highlighted the good performance of a Co-Cr/SBA-15 catalyst in terms of high activity, hydrogen yield and low coke deposition.…”

Section: Introductionmentioning

confidence: 78%

“…Co and Co/Cr catalysts, supported over mesostructured SBA-15 material, were prepared through the incipient wetness impregnation and co-precipitation method using Co(NO 3 ) 2 •6H 2 O and Cr(NO 3 ) 3 •9H 2 O as precursor salts (purchased by Sigma-Aldrich, St. Louis, MO, USA), as described elsewhere [30]. The SBA-15, used as the support, was syn-thetized according the hydrothermal method described for the first time by Zhao [31].…”

Section: Preparation and Characterization Of The Catalystsmentioning

confidence: 99%

“…Thus, the performance of different supports, capable of enhancing hydrogen yield and deactivation resistance, has been investigated [29]. SBA-15, instead of common amorphous silica, was reported to be a very useful support, capable of preventing Co particles aggregation and metal sintering [30]. SBA-15, a well ordered hexagonal mesoporous (4-12 nm) silica structure presents several attractive characteristics as a catalytic support, such as high specific surface area (600-1000 m 2 g −1 ), ease of synthesis, high thermal and mechanical stability [31][32][33]: the porosity of silica is expected to enlarge the metal-oxide interface with respect to support having lower surface areas, with the purpose to magnify the effect of interaction between metal and oxide.…”

Section: Introductionmentioning

confidence: 99%

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On the Support Effect and the Cr Promotion of Co Based Catalysts for the Acetic Acid Steam Reforming

et al. 2021

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This work focuses on the support effect of the performances of Co based catalysts for acetic acid steam reforming. SBA-15, a well ordered hexagonal mesoporous silica structure, and CeO2 have been selected as the supports, with the impact of chromium addition also being investigated. Better acetic acid steam reforming performances have been recorded for CeO2 compared to SBA-15 supported catalysts and, in particular, the 7Co/CeO2 catalyst showed the highest values of acetic acid conversions with enhanced H2 yields below 480 °C, in comparison to the other investigated catalytic formulations. In addition, more pronounced coke depositions and acetone concentrations have been obtained with CeO2 supported catalysts, due to the tendency of ceria to catalyse the ketonization reaction. Chromium addition to Co/SBA-15 catalysts led to an enhancement in the activity towards acetic acid steam reforming, while on CeO2 supported catalysts no improvement in the catalysts’ activity was observed. However, on both SBA-15 and CeO2 supported catalysts, Cr addition reduced the amount of coke deposited on the catalysts surface.

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Section: Introductionmentioning

confidence: 78%

Section: Preparation and Characterization Of The Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Support Effect and the Cr Promotion of Co Based Catalysts for the Acetic Acid Steam Reforming

et al. 2021

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“…Co and Co-Cr catalysts, supported over mesostructured SBA-15 material, were prepared through the incipient wetness impregnation and co-precipitation method using Co(NO3)2•6H2O and Cr(NO3)3•9H2O as precursor salts, as described elsewhere [30]. The SBA-15, used as the support, was synthetized according the hydrothermal method described for the first time by Zhao [31].…”

Section: Preparation and Characterization Of The Catalystsmentioning

confidence: 99%

“…Thus, the performance of different supports, capable of enhancing hydrogen yield and deactivation resistance, has been investigated [29]. SBA-15, instead of common amorphous silica, was reported to be a very useful support, capable of preventing Co particles aggregation and metal sintering [30]. SBA-15, a well ordered hexagonal mesoporous (4-12 nm) silica structure presents several attractive characteristics as a catalytic support, such as high specific surface area (600-1000 m 2 g -1 ), ease of synthesis, high thermal and mechanical stability [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of the Acetic Acid Steam Reforming Over Co-Based Catalysts

Cortese¹,

Ruocco²,

Palma³

et al. 2020

Preprint

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This work focuses on the support effect on the performances of Co-based catalysts for the acetic acid steam reforming. SBA-15, a well ordered hexagonal mesoporous silica structure, and CeO2 have been selected as the supports, with the impact of chromium addition also being investigated. Better acetic acid steam reforming performances have been recorded for CeO2 compared to SBA-15 supported catalysts and, in particular, the 7Co/CeO2 catalyst showed the highest values of acetic acid conversions with enhanced H2 yields below 480°C, in comparison to the other investigated catalytic formulations. In addition, more pronounced coke depositions and acetone concentrations have been obtained with CeO2 supported catalysts, due to the tendency of ceria to catalyse the ketonization reaction. Chromium addition to Co/SBA-15 catalysts led to an enhancement in the activity towards acetic acid steam reforming, while on CeO2 supported catalysts no improvement in the catalysts activity was observed; however, on both SBA-15 and CeO2 supported catalysts, Cr addition reduced the amount of coke deposited on the catalysts surface.

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Hydrogen Production from Formic Acid Using KIT‐6 Supported Non‐Noble Metal‐Based Catalysts

Eslek Koyuncu,

Tug,

Oktar

et al. 2024

ChemPlusChem

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The aim of this study is to investigate the activity of KIT‐6 supported nickel (Ni) and cobalt (Co) catalysts, and the effect of Co incorporation to the Ni@KIT‐6 catalyst in the formic acid (FA) dehydrogenation. Ni and Co are inexpensive and readily available non‐noble transition metals that are considered ideal for dehydrogenation reactions due to their high activity against C‐C and C‐H bond breaking. In this study, KIT‐6 supported catalysts were tested for hydrogen production from FA in a conventionally heated packed‐bed continuous‐flow system. N2 adsorption‐desorption isotherms of the samples were found to be consistent with Type‐IV according to the International Union of Pure and Applied Chemistry (IUPAC) classification. The introduction of metal loading resulted in the preservation of the mesoporous structure of the support material. X‐ray diffraction (XRD) patterns of the catalysts exhibited the characteristic amorphous silica structure. Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFT) analysis, Lewis acidity of Co‐based catalysts was found to be higher than the Ni‐based catalysts. The complete formic acid conversion was observed at 200‐350 °C. The highest H2 selectivity was obtained with the 3Ni@KIT‐6 catalyst. The Co‐based catalysts exhibited relatively lower catalytic activity, which was linked to increased coke formation within these catalysts.

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Hydrogen Production from Steam Reforming of Acetic Acid as a Model Compound of the Aqueous Fraction of Microalgae HTL Using Co-M/SBA-15 (M: Cu, Ag, Ce, Cr) Catalysts

Cited by 22 publications

References 85 publications

On the Support Effect and the Cr Promotion of Co Based Catalysts for the Acetic Acid Steam Reforming

On the Support Effect and the Cr Promotion of Co Based Catalysts for the Acetic Acid Steam Reforming

An Experimental Study of the Acetic Acid Steam Reforming Over Co-Based Catalysts

Hydrogen Production from Formic Acid Using KIT‐6 Supported Non‐Noble Metal‐Based Catalysts

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