Ca–Al layered double hydroxides-derived Ni-based catalysts for hydrogen production via auto-thermal reforming of acetic acid

Wang, Qiao; Xie, Wei; Jia, Xuanyi; Chen, Baiquan; An, Shuang; Xie, Xingyu; Huang, Lihong

doi:10.1016/j.ijhydene.2019.06.026

Cited by 29 publications

(12 citation statements)

References 51 publications

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“…For ATR of HAc, a similar study was conducted. As reported by Wang et al 29, over a NiCaAl catalyst, the HAc conversion and H 2 yield started at 94.0 % and 2.14

mo l_{H 2} {mol}_{HAc}^{- 1}

and then dropped to 66.1 % and 0.68

mo l_{H 2} {mol}_{HAc}^{- 1}

, respectively. Meanwhile, the selectivity to the by‐product acetone was gradually increased up to 38.4 %.…”

Section: Resultssupporting

confidence: 70%

“…As reported by Wang et al [29], the carbon species over the NiAl catalyst were up to 18.36 %, leading to severe deactivation of the catalyst. Therefore, TG-differential thermal analysis (DTA) tests were carried out over the spent catalysts to investigate possible carbon deposition during the ATR process, as shown in Fig.…”

Section: Characterization Of the Spent Catalystsmentioning

confidence: 66%

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Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

et al. 2022

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To obtain high yields of hydrogen, a series of Zr x Pr 1-x O y -supported cobalt catalysts were synthesized by the sol-gel method and tested in autothermal reforming (ATR) of acetic acid (HAc) derived from bio-oil. X-ray diffraction, nitrogen physisorption, H 2 -temperature-programmed reduction, and thermogravimetric analysis were conducted to investigate the factors affecting the activities of the catalysts. Over the Co-Zr-Pr-O catalyst, a Zr x Pr 1-x O y solid solution was formed after calcination; meanwhile, the active component of Co 0 was highly dispersed over the solid solution after reduction in hydrogen for 1 h at 700 °C. As a result, stable reactivity was recorded in the ATR process of HAc: the hydrogen yield reached 2.58 mol H2 mol À1HAc with near 100 % HAc conversion, while better resistance to coking was observed.

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“…For ATR of HAc, a similar study was conducted. As reported by Wang et al 29, over a NiCaAl catalyst, the HAc conversion and H 2 yield started at 94.0 % and 2.14

mo l_{H 2} {mol}_{HAc}^{- 1}

and then dropped to 66.1 % and 0.68

mo l_{H 2} {mol}_{HAc}^{- 1}

, respectively. Meanwhile, the selectivity to the by‐product acetone was gradually increased up to 38.4 %.…”

Section: Resultssupporting

confidence: 70%

Section: Characterization Of the Spent Catalystsmentioning

confidence: 66%

Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

et al. 2022

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“…As diffraction peaks at 13°, 23°, 35°, 39° and 47° are assigned to typical layered structures of MgAl hydrotalcite framework with low surface index numbers (See Fig. 3a) for Pt-cp, PtCo(1)-sol-gel and PtCo(1) cp catalysts [37], we find that peaks at 61° and 63° ascribed to (440) facet display detectable blue shift towards lower diffraction angle, as Co species are present in LDH framework [38][39][40][41][42][43]. It suggests that PtCo nanoparticles interact strongly with (440) lattice with high concentration of unsaturated surface sites [41].…”

Section: Structural Uniqueness Of Bimetallic Ptco/mgal Hydrotalcite Catalystsmentioning

confidence: 94%

Electronically Coupled PtCo/MgAl Hydrotalcite Catalysts Display Tunable Selectivity Toward Glyceric Acid and Lactic Acid for Glycerol Conversion

Liu

Yan

et al. 2020

Catal Lett

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Selective oxidation of glycerol is one of the most promising routes to produce value-added fine chemicals from biomass. However, achieving good selectivity towards glyceric and lactic acids still remains a grand challenge in this field. A series of unique electronically coupled PtCo catalysts, supported on layered double hydroxides via co-precipitation method, was reported in this work, as they display tunable selectivity toward glyceric acid and lactic acid during glycerol conversion. It is found that the unusual electronic transfer from MgAl hydrotalcite support to cobalt species, leading to high electron binding energy of PtCo sites on catalyst surface. The presence of cobalt components contributes to synergistic enhancement of oxidation activity at electron deficient Pt sites and more critically, weakened Pt-O strength during glycerol conversion. Such unique electronic reconfiguration, as characterized by XRD and XPS spectroscopy, induces two alternative reaction pathways under different reaction temperatures. While Pt-O bonding strength is significantly weakened by strong Co-O affinity at relatively higher reaction temperature (100 °C), such effect is almost negligible at 50 °C. As a result, lactic acid selectivity of 67% was obtained at 100 °C, while glyceric acid selectivity of 65% was achieved at 50 °C, over the bifunctional PtCo/MgAl hydrotalcite catalysts. The design principles reported in this work offer alternative approaches for manufacturing cost-effective catalytic materials for glycerol conversion to various value-added carboxylic acids and derivatives.

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“…Addition of oxygen can balance the heat need and relieve possible coking by gasification of carbonous species, 17 but extra oxygen compromises hydrogen yield. 36,37 Herein, the ratio of 0.28 can be the optimal ratio of oxygen to carbon for ATR of HAc.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Al-Doped Ni–Mn–O Catalysts for Auto-Thermal Reforming of Acetic Acid: Role of MnAl₂O₄ for Stability of Ni Species

Song

Chen

et al. 2020

Energy Fuels

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Auto-thermal reforming (ATR) of acetic acid (HAc) from renewable bio-oil is an alternative route for hydrogen production, and a series of Ni/Mn(II)Al(III)O x±δ catalysts were prepared via co-precipitation method and tested in the ATR of HAc. Different parameters including reaction temperatures, O/C molar ratios, gas-hourly space velocity (GHSV), and stability were investigated. The optimal Ni0.39Mn1.61AlO4.31±δ catalyst exhibited excellent catalytic performance in a 50 h ATR test: HAc was converted to H2-rich gas with conversion near 100% and hydrogen yield at 2.7 mol H2/mol HAc. Characterization results demonstrate that with strong interaction among nickel, manganese, and aluminum, a thermally stable spinel structure of MnAl2O4 over the MnO support was formed and restrained the growth of Ni particle; meanwhile, oxygen vacancies were found and were beneficial for oxygen transfer in the gasification of carbon. As a result, deactivation by carbon deposition and sintering was restrained. Moreover, high GHSV up to 120,000 mL/(gcat.·h) and fast response to startup were recorded, showing potential for hydrogen feeding via the ATR process.

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Ca–Al layered double hydroxides-derived Ni-based catalysts for hydrogen production via auto-thermal reforming of acetic acid

Cited by 29 publications

References 51 publications

Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

Electronically Coupled PtCo/MgAl Hydrotalcite Catalysts Display Tunable Selectivity Toward Glyceric Acid and Lactic Acid for Glycerol Conversion

Highly Efficient Al-Doped Ni–Mn–O Catalysts for Auto-Thermal Reforming of Acetic Acid: Role of MnAl₂O₄ for Stability of Ni Species

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Ca–Al layered double hydroxides-derived Ni-based catalysts for hydrogen production via auto-thermal reforming of acetic acid

Cited by 29 publications

References 51 publications

ZrxPr1–xOy Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

ZrxPr1–xOy Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

Electronically Coupled PtCo/MgAl Hydrotalcite Catalysts Display Tunable Selectivity Toward Glyceric Acid and Lactic Acid for Glycerol Conversion

Highly Efficient Al-Doped Ni–Mn–O Catalysts for Auto-Thermal Reforming of Acetic Acid: Role of MnAl2O4 for Stability of Ni Species

Contact Info

Product

Resources

About

Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

Highly Efficient Al-Doped Ni–Mn–O Catalysts for Auto-Thermal Reforming of Acetic Acid: Role of MnAl₂O₄ for Stability of Ni Species