Effect of Ni precursor salts on Ni-mayenite catalysts for steam methane reforming and on Ni-CaO-mayenite materials for sorption enhanced steam methane reforming

Giuliano, Andrea Di; Gallucci, Katia; Foscolo, P.U.; Courson, Claire

doi:10.1016/j.ijhydene.2019.01.131

Cited by 44 publications

(24 citation statements)

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“…Characterization methods are as follows with references containing their descriptions: ICP-AES (inductively coupled plasma-atomic emission spectroscopy) [58] ; XRD (x-ray diffraction) [17,58,59] ; N 2 adsorption with BET (Brunauer-Emmett-Teller) multipoint method and BJH (Barrett-Joyner-Halenda) method [17,58,59] ; SEM/EDS (scanning electron microscopy/energy dispersive x-ray spectrometry), TEM (transmission electron microscopy), and STEM (scanning transmission electron microscopy) combined with EDS [17,58,59] ; TPR (temperature programmed reduction [17,58,59] ; and TGA (thermogravimetric analysis). [59,60]…”

Section: Characterization Methodsmentioning

confidence: 99%

“…Regarding the porosity of the wet mixing products, an increase in free CaO fraction had a negative influence (compare CaO0 in Figure 1A,B to CaOx in Figure 1C,D or Figure [17,58] 14.06 m 2 Á g −1 to 12.79 m 2 Á g −1 ) and had higher V BJH . Among the CaO-mayenite sorbents, the S BET values were similar, while the V BJH decreased as the CaO fraction increased, with the exception of CaO45 (also showing singularity in Table 1).…”

Section: Characterization Of Fresh Materialsmentioning

confidence: 99%

“…Nominal elemental compositions and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) experimental results for as-synthesized materials [58] CaO0Ni(N)3 26.2 33.4 3.0 1.3 28.7 37.3 2.9 1.3 Di Giuliano et al [58] CaO0Ni [58] CaO0Ni(Ac)3 26.2 33.4 3.0 1.3 27.9 37.0 3.1 1.3 Di Giuliano et al [58] CaO0Ni [58] CaO54Ni(N)3 12.1 52.5 3.0 4.4 10.3 47.0 2.4 4.6 Di Giuliano et al [58] CaO54Ni(N)10 11.0 47.8 9.7 4.4 11.0 48.0 9.3 4.4 Di Giuliano et al [58] CaO54Ni(Ac)3 12.1 52.5 3.0 4.4 10.1 47.0 2.5 4.7 Di Giuliano et al [58] CaO54Ni(Ac)10 11.0 47.8 9.7 4.4 11.5 48.0 9.8 4.2 Di Giuliano et al [58] 2 | EXPERIMENTAL MAERIALS AND METHODS…”

Section: T a B L Ementioning

confidence: 99%

“…[17] Measured quantities of the main elements were generally close to the nominal ones, as confirmed by ICP-AES (Table 1), while the XRD analyses proved that the elements combined in the desired crystalline phases (CaO, mayenite, and NiO, since fresh materials are calcined). [17,58,59,61,62] The wet mixing and wet impregnation methods only involved distilled water as a solvent and calcination under ambient air, [17] which enables easy scale-up to industrial equipment, as was done in WP4.…”

Section: Characterization Of Fresh Materialsmentioning

confidence: 99%

“…That wide research effort has resulted in many publications since 2016. [15][16][17]37,56,[58][59][60][61][62][63][64][65] Each one is focused on a specific task or issue. Therefore, each individual work does not provide a full representation of the research that began with the ASCENT project.…”

Section: Introductionmentioning

confidence: 99%

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Sorption enhanced steam methane reforming by Ni/CaO/mayenite combined systems: Overview of experimental results from European research project ASCENT

et al. 2020

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Work Package 4 (WP4) of the European research project ASCENT developed combined sorbent‐catalyst materials (CSCM) for sorption enhanced steam methane reforming (SESMR), based on nickel (Ni) and calcium oxide (CaO). This work summarizes the whole experimental study carried out in ASCENT WP4 on Ni/CaO/mayenite systems obtained from wet mixing and wet impregnation synthesis methods. Effects from Ni precursor (Ni (CH3COO)2 · 4H2O or Ni(NO3)2 · 6H2O), Ni load (from 3 wt%‐10 wt%), and free CaO load (from 0 wt%‐54 wt%) were investigated for 26 materials by means of characterizations and reforming reactivity tests in a packed‐bed microreactor (650°C, 1 atm). Thanks to comparative analyses of the results, evidence emerged about the detrimental influence of low Ni/CaO ratio on the reforming catalytic activity of solid inventories, made of CSCM or even of the raw mixing of CaO‐mayenite and Ni‐mayenite particles. Catalytic materials were active towards reforming only when derived from Ni(NO3)2 · 6H2O. Based on this, the best CSCM (with the lowest free CaO content and the highest Ni load from nickel nitrate) was chosen to further study its industrial applicability by multicycle SESMR/sorbent‐regeneration tests in a bench‐scale packed‐bed rig and attrition tests according to ASTM D5757‐11. The CSCM was stable and active for 200 cycles with regenerations in N2 at 850°C, while a progressive loss of its activity occurred with regenerations in CO2 at 925°C as the cycle number increased due to Ni sintering. Its performance in the attrition tests was comparable to that of calcined dolomite.

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