Steam reforming of acetic acid over nickel-based catalysts: The intrinsic effects of nickel precursors on behaviors of nickel catalysts

Yu, Zhenjie; Jia, Peng; Zhang, Zhanming; Dong, Dehua; Hu, Guangzhi; Hu, Song; Wang, Lele

doi:10.1016/j.apcatb.2018.06.020

Cited by 93 publications

(32 citation statements)

References 46 publications

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“…This effect was particularly severe in catalysts with nickel chloride as a precursor; its reduction peak at around 500 C clearly shows that NiAl 2 O 4 formed and combined strongly with support material, making it difficult to be reduced and thereby limiting the catalytic effect of the nickel species. [40]…”

Section: H 2 Tpr Analysismentioning

confidence: 99%

Effect of Additives on Ni‐Based Catalysts for Hydrogen‐Enriched Production from Steam Reforming of Biomass

Wang

Zhang

et al. 2020

Energy Tech

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The catalytic steam reforming of biomass for hydrogen production is investigated in a fixed‐bed reactor. A suitable additive and precursor is found in various additives (cobalt, strontium, and lanthanum) and nickel salt precursors (nickel nitrate, nickel acetate, nickel chloride, and nickel sulfate). Synthesized samples are characterized by X‐ray diffraction (XRD), NH3 temperature‐programmed desorption (TPD), H2 temperature‐programmed reduction (TPR), and transmission electron microscopy (TEM). Results show that Co and La doping of the Ni/Al2O3 catalyst improves the dispersion of surface‐active particles and reduces the particle size, increasing H2 production. The hydrogen volume fraction of La‐modified catalysts with 10% Ni is 38.96%, which is higher than 30.39% for the unmodified Ni/Al2O3 catalyst. The lowest hydrogen yield of Ni–Sr/Al2O3 catalyst is 19.22%. This low catalytic activity is due to the reaction of Ni–Sr/Al2O3 with SiO2 found in biomass ash, which generates silicate without catalytic effect. The silicate melts and adheres to the catalyst surface at a high temperature, inhibiting the catalysis of nickel active sites. The maximum hydrogen yield obtained with nickel acetate as catalyst precursor is 51.41%, which is due to nickel acetate decomposing and forming more NiO in the amorphous state and improving the performance of catalyst.

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Section: H 2 Tpr Analysismentioning

confidence: 99%

Effect of Additives on Ni‐Based Catalysts for Hydrogen‐Enriched Production from Steam Reforming of Biomass

Wang

Zhang

et al. 2020

Energy Tech

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“…As shown in Fig. 3 (a) and (b), all the catalysts exhibited the IV-type Langmuir adsorption isotherm, which was assigned to the mesoporous structures [35][36][37] . The height of the hysteresis loop decreased with increasing the barium loading, corresponding to the decreased specific surface area of the Ni-based catalyst.…”

Section: Specific Surface Areamentioning

confidence: 81%

Steam reforming of acetic acid over Ni–Ba/Al2O3 catalysts: Impacts of barium addition on coking behaviors and formation of reaction intermediates

Zhang

Wang

Sun

et al. 2020

Journal of Energy Chemistry

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“…These results indicated that the nitrate and chloride salts were good precursors than sulfate based on activity consideration. However, chloride precursor is unfavorable environmentally because of a persistent organics emission source, therefore it was assumed that nickel nitrate was the best candidate for methanation catalyst precursor [22][23][24]. According to the characterization results of fresh catalysts ( Table 1, and Figure 1), no significant differences were observed for the properties of three fresh catalysts.…”

Section: со Conversionmentioning

confidence: 98%

“…Moreover, the catalysts contained similar amounts of nickel metal species, and their surface areas were almost same. Though the catalysts were prepared using the same method of impregnation-co-precipitation, the only catalytic performance of Ni/Al (S) was very low [24]. In order to examine a possible residual sulfur effect on catalytic activity, total sulfur of fresh catalysts were determined.…”

Section: со Conversionmentioning

confidence: 99%

Effect of nickel precursor and catalyst activation temperature on methanation performance

et al. 2018

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This work studied an effect of anionic precursor on the preparation of active and fine nickel metal catalysts for syngas methanation. Nickel catalysts were pr¬epared by impregnation-co-precipitation method. Nickel hydrate salts of Ni(NO3)2·6H2O, NiSO4·6H2O and NiCl2·6H2O were used as a metal catalyst precursor, and the obtained catalysts were named as Ni/Al (N), Ni/Al (S) and Ni/Al (Cl), respectively. Methanation synthesis of carbon monoxide was carried out in a fixed bed stainless reactor. Prior to experiment, the catalyst powder was pressed into tablets, then crushed and sieved to use 0.5-0.9 mm particles. Reactions were performed at the temperature of 350 °C in the pressure of 3 atm of H2:CO syngas (the molar ratio of 3:1) with the GHSV of 3000 h-1. In the present methanation conditions, the Ni/Al (N), Ni/Al (S) and Ni/Al (Cl) catalysts gave the CH4 selectivity of 93%, 18% and 91% (vol.), respectively. The XRD and ICP-OES analysis clarified that although the Ni/Al (S) catalyst contained a similar nickel amount of 17.4 wt % to other two catalysts, its metal distribution was poor. Also the low activity of the Ni/Al (S) catalyst was caused by the contamination of remained sulfur from sulfate precursor. This work also examined an influence of catalyst activation temperature pre-synthesis. The Ni/Al (N) catalyst was reduced by pure hydrogen gas at different temperatures of 350 ºС, 400 ºС or 450 ºС. The catalyst activated at 400 ºС produced the highest CH4 amount of 0.087 mmol·g-1cat for the duration of 1h methanation. An initial temperature of methane formation was the lowest for the Ni/Al (N) catalyst which was activated at 400 ºС among three catalysts.

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Steam reforming of acetic acid over nickel-based catalysts: The intrinsic effects of nickel precursors on behaviors of nickel catalysts

Cited by 93 publications

References 46 publications

Effect of Additives on Ni‐Based Catalysts for Hydrogen‐Enriched Production from Steam Reforming of Biomass

Effect of Additives on Ni‐Based Catalysts for Hydrogen‐Enriched Production from Steam Reforming of Biomass

Steam reforming of acetic acid over Ni–Ba/Al2O3 catalysts: Impacts of barium addition on coking behaviors and formation of reaction intermediates

Effect of nickel precursor and catalyst activation temperature on methanation performance

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