Nickel supported on low-rank coal for steam reforming of ethyl acetate

Ruhswurmova, Nikola; Kim, Soohyun; Yoo, Jiho; Chun, Dong Hyun; Rhim, Youngjoon; Lim, Jeong-Hoon; Kim, Sang-Do; Choi, Hokyung; Lee, Sihyun

doi:10.1016/j.ijhydene.2018.06.104

Cited by 11 publications

(7 citation statements)

References 47 publications

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“…Figure 7 shows the TEM images and single metal mapping results of the Ni/Eco, Ni-Ce/Eco, and Ni-Mg/Eco catalysts. Ni/Eco prepared by the IWI method in this work resulted in 2−3 nm larger particle size than Ni/Eco by the Imp method (Figure 7a) [34]. In addition, more aggregated particles (>10 nm in size) by IWI were found than by Imp.…”

Section: Characterization Of Catalystsmentioning

confidence: 66%

“…The intense peaks at 450-700 °C were most likely due to NiO bound to the LRC support, and the peak maximum was shifted to a higher temperature (10-50 °C) via the interaction between Ni and Ce (or Mg) [60]. The unknown amount of H2 was probably generated as a pyrolysis product of LRC in the high-temperature region and seemingly contributed to the peak intensity [34]. The relative intensity of the peaks at the high temperature (HT, 450-700 °C), compared to those at the low temperature (LT, 150-400 °C), decreased when the promoter (Ce or Mg) was introduced.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…The catalyst support was prepared using Indonesia LRC (Eco), which was pulverized to 0.5-1.0 mm. Table 1 shows the proximate and ultimate analyses of Eco [34]. The dispersion was performed using the incipient wetness impregnation (IWI) method.…”

Section: Preparation Of Catalystsmentioning

confidence: 99%

“…The adsorption behavior is typically influenced by the surface composition. LRC contains a large amount of oxygen, which can be controlled to some extent quantitatively by changing the heat treatment conditions [34]. This control of the LRC composition can be a tool to secure custom-made support according to the hydrophobicity of the reactants.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

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Low-Rank Coal Supported Ni Catalysts for CO2 Methanation

et al. 2021

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As renewable energy source integration increases, P2G technology that can store surplus renewable power as methane is expected to expand. The development of a CO2 methanation catalyst, one of the core processes of the P2G concept, is being actively conducted. In this work, low-rank coal (LRC) was used as a catalyst support for CO2 methanation, as it can potentially enhance the diffusion and adsorption behavior by easily controlling the pore structure and composition. It can also improve the process efficiency owing to its simplicity (no pre-reduction step) and high thermal conductivity, compared to conventional metal oxide-supported catalysts. A screening of single metals (Ni, Co, Ru, Rh, and Pd) on LRC was performed, which showed that Ni was the most active. When Ni on the LRC catalyst was doped with a promoter (Ce and Mg), the CO2 conversion percentage increased by >10% compared to that of the single Ni catalyst. When the CO2 methanation activity was compared at 250–500 °C, the Ce-doped Ni/Eco and Mg-doped Ni/Eco catalysts showed similar or better activity than the commercial metal oxide-supported catalyst. In addition, the catalytic performance remained stable even after the test for an extended time (~200 h). The results of XRD, TEM, and TPR showed that highly efficient LRC-based CO2 methanation catalysts can be made when the metal dispersion and composition are modified.

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Section: Characterization Of Catalystsmentioning

confidence: 66%

Section: Characterization Of Catalystsmentioning

confidence: 99%

Section: Preparation Of Catalystsmentioning

confidence: 99%

Section: Characterization Of Catalystsmentioning

confidence: 99%

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Low-Rank Coal Supported Ni Catalysts for CO2 Methanation

et al. 2021

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“…The interpretation of the effect of the operating conditions is not trivial. Previous studies were carried out on ethanol [5][6][7]9,12,26,27,29,33,35,[44][45][46], ethyl acetate [12,43,[47][48][49][50][51], and acetic acid [12,24,27,[34][35][36]44], but not on mixtures of all three. In the following, a simplified scheme of the possible reactions involving the main components of the AZ mixture is reported (Equations (1)-(30)) [43].…”

Section: Discussionmentioning

confidence: 99%

Ni/CeO2 Structured Catalysts for Solar Reforming of Spent Solvents

Landi

Benedetto

2019

Catalysts

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Spent solvents of the packaging industry are disposed of, thus representing economic, safety, and environmental issues. Steam reforming of these solvent streams can be an alternative, allowing their valorization to syngas. In this work, ceria supported nickel catalysts were deposed onto silicon carbide (SiC) honeycomb monoliths; these structured catalysts can be potentially used in solar steam reforming. Catalysts were characterized by SEM/EDS and tested in a lab-scale rig under conventional heating. Two spent solvent streams, coming from the distillation plant of the packaging industry Icimendue, were used as fuels. Catalytic tests have been carried out by changing the steam/carbon ratio, oxygen/carbon ratio, operating pressure, and fuel. The effect of the Ni content and the type of ceria were also studied. The best performances were obtained at low Ni content and by using micrometric rather than nanometric ceria as support. The structured catalysts showed good coking resistance, especially at H2O/C > 2, with oxygen addition furnishing a marginal improvement. On the contrary, oxygen feeding reduced the gas yield due to the formation of by-products being less reactive in reforming reactions. Performing the reforming process at high pressure the gas yield increased due to faster kinetics (higher reactants concentrations), higher contact times (slower flow rates), and process intensification. These results suggest that the proposed structured catalysts could be successfully applied in the solar reforming of spent solvents.

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