Preparation, modification and development of Ni-based catalysts for catalytic reforming of tar produced from biomass gasification

Zhang, Zhikun; Liu, Lina; Shen, Boxiong; Wu, Chunfei

doi:10.1016/j.rser.2018.07.010

Cited by 220 publications

(52 citation statements)

References 207 publications

(283 reference statements)

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“…Moreover, it can be seen that ReNi/GDC exhibits higher CO conversion rate compared to 5%Ni/GDC catalysts. The bimetallic catalyst ReNi/GDC becomes active above 200 C and reaches the maximum of 99% conversion rapidly at around 350 C. The combination of H 2 -TPR and CO chemisorption results suggests that ReNi/GDC has an excellent redox property, the smallest particle size and the highest nickel dispersion on GDC support, which contributes to the highest water gas shift activity [24,25]. 1%Re5%Ni/GDC (Daiichi) was further examined at 270 C for 24 h. The CO conversion versus time plot is presented in Figure 6.…”

Section: Wgs Activity Of Ni Catalystsmentioning

confidence: 99%

Enhancement of hydrogen production using Ni catalysts supported by Gd-doped ceria

Tojira¹,

Lomonaco²,

Sesuk³

et al. 2021

Heliyon

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A redox cycle between Ce 4þ and Ce 3þ is an elementary step in water gas shift (WGS) mechanism. By facilitating the redox cycle between þ4 and þ3 of cerium, a formation of oxygen vacancy can be enhanced. It is considered to be a dominating factor in developing the WGS performance and the stability of ceria in this work. We have facilitated the redox cycle in CeO 2 to enrich the WGS activity. The WGS reaction was carried out on Ni catalyst supported by Gd-doped ceria (GDC) from Daiichi. Ni and Re were added onto GDC by impregnation method to examine the role of Re addition on surface, structural and reducibility, which affected upon their catalytic activities. Rhenium has an influence on increasing the water gas shift performance of Ni/GDC catalysts because it facilitates the redox process at the surface of ceria, disperses Ni particles and enhances oxygen vacancy formation. The results indicate that the water gas shift activity of 1%Re4%Ni/GDC is higher than that of 5%Ni/GDC. The dispersion of active site on the surface of catalyst results in an increase of CO molecule adsorption and acceleration of the redox cycle between Ce 4þ and Ce 3þ of ceria support via oxygen vacancy generation. Therefore, using a combination of these two effects can enhance the WGS performance.

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Section: Wgs Activity Of Ni Catalystsmentioning

confidence: 99%

Enhancement of hydrogen production using Ni catalysts supported by Gd-doped ceria

Tojira¹,

Lomonaco²,

Sesuk³

et al. 2021

Heliyon

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“…The use of both catalysts reached gravimetric tar (class 5 tar) conversions with respect to the non-catalytic case of 53% and 65 % at 800 • C and 70% and 81% at 1000 • C for catalyst #1 and #2 respectively, as can be calculated from the tar yields presented in figure 5a. These conversions are not that high compared to the conversion obtained by using supported metal catalysts (which are above 90% at similar temperature ranges) [74]. However, the production of soot, a byproduct of tar cracking, which tends to be more problematic than tar itself, decreased at high temperatures as it can be seen in figure 5b.…”

Section: Syngas Yield and Compositionmentioning

confidence: 75%

Seashell waste-derived materials for secondary catalytic tar reduction in municipal solid waste gasification

Gomez-Rueda

Zaini

Yang

et al. 2020

Biomass and Bioenergy

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Catalytic tar removal from producer gas is critical for the economic feasibility of Municipal Solid Waste (MSW) gasification in the waste-to-energy(WtE) approach. Nickel-and noble-metal catalysts have the highest tar cracking activities, but they increase costs, use scarce materials, and generate dangerous byproducts. To overcome these drawbacks, naturally occurring materials should be used for tar cracking. In this paper, two nanomaterials, synthesized from oyster and mussel waste shells respectively, are used to clean syngas from MSW in a secondary tar cracking unit. We observed that they reform class 1 tar (heavy tars that condense at high temperatures at very low concentrations) into class 3 tar (light hydrocarbons that are not important in condensation) and benzene. Although both catalysts' composition and textural properties were identical, crystallite size and especially specific surface area variation was enough to generate a change in product selectivity.A larger crystallite size and SSA shows a soot yield reduction of 95% with respect to the non-catalytic case, simultaneously increasing the H 2 /CO at 1000 • C.

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“…Meanwhile, YH2 over 10%Ni/ACN reduced significantly after 3h of reaction. This phenomenon is expected as Ni catalyst commonly undergoes significant deactivation in SRT owing to carbon deposition [38,39], whereas, low catalytic activities or almost no activities are observed for homogenous, AC and 10%Co/ACN. The deactivation behavior of Co catalyst in CO2 reforming of toluene is also reported previously by Bao et al due to the sintering effect of metallic Co particles, which depend on the amount of Co loading amount [40].…”

Section: Catalytic Activity In Steam Reforming Of Toluenementioning

confidence: 95%

Catalytic Steam Reforming of Toluene for Hydrogen Production over Nickel-Cobalt Supported Activated Carbon

Yahya

Amin²

2019

IJIE

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Global energy supply is almost entirely dependent on fossil fuels such as oil, coal and natural gas [1]. Thus, utilization of non-renewable resources has led to a significant increase of greenhouse gas emission affecting the environment due to climate change. Therefore, reduction of global warming impact has driven the attention towards utilizing renewable source of energy, including biomass [2]. Synthesis gas (syngas), a mixture of primarily carbon monoxide (CO) and hydrogen (H2) has been seen as a promising energy source to replace conventional fossil fuelbased energy. Syngas can also be utilized as an alternative to natural gas fuel for power or H2 production. Compared to fossil fuel, biomass has significant advantages such as abundantly available, inexhaustibility, renewability, carbonneutrality and low sulfur content. The syngas can also be used further as a feedstock for the production of hydrocarbon fuels via the Fischer-Tropsch synthesis (FTS) process. However, biomass-based syngas contains high concentration of tars byproducts, which represent a mixture of several aromatic compounds, that prevents the syngas from direct use and requires an effective tar removal approach. It is essential to remove tar content prior to syngas utilization because the inevitable tars-byproduct causes clogging of lines and heat exchangers as well as catalyst deactivation due to coke formation [3]. Tar formation poses as the greatest hurdles of successful implementation of biomass gasification technologies in a commercial scale. Hence, the removal of tar in biomass gasification is highly desirable. Catalytic steam reforming (SR) of tar is one of the most promising technique because of its high conversion efficiency for hydrogen production [4]. Additionally, catalytic SR of tars is able to increase syngas production where it

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Preparation, modification and development of Ni-based catalysts for catalytic reforming of tar produced from biomass gasification

Abstract: 2018). Preparation, modification and development of Ni-based catalysts for catalytic reforming of tar produced from biomass gasification. Renewable and Sustainable Energy Reviews, 94, 1086-1109. https://doi.

Cited by 220 publications

References 207 publications

Enhancement of hydrogen production using Ni catalysts supported by Gd-doped ceria

Enhancement of hydrogen production using Ni catalysts supported by Gd-doped ceria

Seashell waste-derived materials for secondary catalytic tar reduction in municipal solid waste gasification

Catalytic Steam Reforming of Toluene for Hydrogen Production over Nickel-Cobalt Supported Activated Carbon

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