Nickel based monometallic and bimetallic catalysts for synthetic and real bio-oil steam reforming

Bizkarra, K.; Bermúdez, J.M.; Arcelus-Arrillaga, Pedro; Barrio, V.L.; Cambra, J.F.; Millán, Marcos

doi:10.1016/j.ijhydene.2018.03.049

Cited by 50 publications

(25 citation statements)

References 55 publications

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“…Toluene steam reforming was carried out in a fixed bed reactor used in previous bio-oil reforming work [24]. Before the reaction, the reactor was purged with N 2 to remove air.…”

Section: Catalytic Toluene Steam Reforming Testsmentioning

confidence: 99%

“…Under these premises, this work showcases the application of a Ni/Al 2 O 3 catalyst in the steam reforming of toluene (C 7 H 8 ) as a tar model compound in a fixed bed reactor. Until now, the catalytic performance in the steam reforming of toluene has been mainly evaluated as a function of catalyst design variables, such as the nature of the support [20][21][22] and metal [23,24], but little attention has been paid to the reaction conditions, especially for this benchmark catalytic formulation [25]. Identification and optimisation of the reaction parameters in the presence of a commercial-like catalyst (Ni/Al 2 O 3 ) are vital to achieving the best catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

2020

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Identifying the suitable reaction conditions is key to achieve high performance and economic efficiency in any catalytic process. In this study, the catalytic performance of a Ni/Al2O3 catalyst, a benchmark system—was investigated in steam reforming of toluene as a biomass gasification tar model compound to explore the effect of reforming temperature, steam to carbon (S/C) ratio and residence time on toluene conversion and gas products. An S/C molar ratio range from one to three and temperature range from 700 to 900 °C was selected according to thermodynamic equilibrium calculations, and gas hourly space velocity (GHSV) was varied from 30,600 to 122,400 h−1 based on previous work. The results suggest that 800 °C, GHSV 61,200 h−1 and S/C ratio 3 provide favourable operating conditions for steam reforming of toluene in order to get high toluene conversion and hydrogen productivity, achieving a toluene to gas conversion of 94% and H2 production of 13 mol/mol toluene.

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“…Toluene steam reforming was carried out in a fixed bed reactor used in previous bio-oil reforming work [24]. Before the reaction, the reactor was purged with N 2 to remove air.…”

Section: Catalytic Toluene Steam Reforming Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

2020

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“…The beneficial role of cerium was also emphasized in Refs. [39,40]. Modification of Ni/Al 2 O 3 by Ce resulted in improved stability of the catalyst in pyrolysis and in-line steam reforming of lignocellulosic biomass due to a reduction in coke formation rate.…”

Section: Formation Of Coke Depositmentioning

confidence: 99%

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Grams

Ruppert

2021

Catalysts

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The pyrolysis of lignocellulosic biomass is one of the most promising methods of alternative fuels production. However, due to the low selectivity of this process, the quality of the obtained bio-oil is usually not satisfactory and does not allow for its direct use as an engine fuel. Therefore, there is a need to apply catalysts able to upgrade the composition of the mixture of pyrolysis products. Unfortunately, despite the increase in the efficiency of the thermal decomposition of biomass, the catalysts undergo relatively fast deactivation and their stability can be considered a bottleneck of efficient pyrolysis of lignocellulosic feedstock. Therefore, solving the problem of catalyst stability is extremely important. Taking that into account, we presented, in this review, the most important reasons for catalyst deactivation, including coke formation, sintering, hydrothermal instability, and catalyst poisoning. Moreover, we discussed the progress in the development of methods leading to an increase in the stability of the catalysts of lignocellulosic biomass pyrolysis and strengthening their resistance to deactivation.

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“…Fan et al 19 studied Ni/ZnO-TiO 2 catalysts for hydrogen production from acetic acid steam reforming and found that the average pore size of the composite support catalyst was small and the proportion of micropores was high, which improved the dispersion of active components. Bizkarra et al 20 studied a nickel-based catalyst with Al 2 O 3 as a support and performed steam reforming of bio-oil for hydrogen production to explore the effect of CeO 2 -modified Al 2 O 3 support. They pointed out that CeO 2 , as an auxiliary agent, provided oxygen migration performance for the catalyst, improved the stability of the catalysts, and prolonged the time to maintain a higher H 2 yield.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Bio-Oil-Derived Acetic Acid over CeO₂-ZnO Supported Ni Nanoparticle Catalysts

Luo

Sun

et al. 2020

ACS Omega

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The steam reforming of bio-oil-derived acetic acid over the developed Ni/CeO 2 -ZnO nanoparticle catalysts for hydrogen production was studied. The correlations of CeO 2 to ZnO mass ratio (CZMR) and nickel loading with the properties and performances of Ni/CeO 2 -ZnO catalysts were explored. The H 2 , CO, and potential H 2 yields followed a Gaussian normal distribution with increasing the CZMR. An exponential function equation was established to correlate the H 2 , CO, and potential H 2 yields with Ni loading. As the CZMR increased from 0 to 1/3, the H 2 yield increased from 57.8 to 69.4%, with a growth rate of 20.1%. Further, on increasing the CZMR from 1/3 to 3, the H 2 yield decreased by 37.6%. The CO yield showed a similar trend for the H 2 yield on increasing the CZMR, which first increased to a peak value, then started to decrease rapidly and finally stabilized. The yield of H 2 increased significantly from 20.6 to 73.5%, with the increase of nickel loading from 0 to 15%. Further, on increasing the nickel loading from 15 to 25%, the H 2 yield increased by only 5.8%. With the CZMR of 1/3 and the nickel loading of 15%, the selectivities of H 2 and CO were as high as 91.6 and 42.3%, respectively.

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Nickel based monometallic and bimetallic catalysts for synthetic and real bio-oil steam reforming

Cited by 50 publications

References 55 publications

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Catalytic Steam Reforming of Bio-Oil-Derived Acetic Acid over CeO₂-ZnO Supported Ni Nanoparticle Catalysts

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Nickel based monometallic and bimetallic catalysts for synthetic and real bio-oil steam reforming

Cited by 50 publications

References 55 publications

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

Catalytic Steam Reforming of Toluene: Understanding the Influence of the Main Reaction Parameters over a Reference Catalyst

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Catalytic Steam Reforming of Bio-Oil-Derived Acetic Acid over CeO2-ZnO Supported Ni Nanoparticle Catalysts

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Catalytic Steam Reforming of Bio-Oil-Derived Acetic Acid over CeO₂-ZnO Supported Ni Nanoparticle Catalysts