Self-assembly of CNTs@Ni foam electrode material and its activation effect during catalytic reforming of bio-oil model compound for hydrogen at different temperatures

He, Limo; Yin, Xiaofei; Tao, Chong; Zhou, Xianmei; Ren, Qiangqiang; Xu, Jun; Hu, Song; Su, Sheng; Wang, Yi; Xiang, Jun

doi:10.1016/j.fuel.2022.127155

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…Although the main focus when designing a catalyst for the ESR is to improve H 2 production while avoiding carbon/coke formation, , catalysts based on Ni supported on Al 2 O 3 or CaO have been successfully used, at particular conditions, for the coproduction of H 2 and nanostructured carbon (filamentous/nanotubes). These carbon materials are valuable products for many applications in electronics, biomedicine, catalysis, and hydrogen storage. − He et al prepared carbon nanotubes from steam reforming of pyrrole over Ni–Fe/Ni foam catalysts with excellent electrochemical performance for their use as supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

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Global Vision of the Reaction and Deactivation Routes in the Ethanol Steam Reforming on a Catalyst Derived from a Ni–Al Spinel

Iglesias-Vázquez,

Valecillos,

Remiro

et al. 2024

Energy Fuels

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Ethanol steam reforming (ESR) over a Ni/Al 2 O 3 catalyst prepared by reduction of a NiAl 2 O 4 spinel is a promising alternative route to produce H 2 from biomass. This work deepens into the effect of reaction conditions (450−650 °C, a steam/ ethanol (S/E) ratio of 3−9, and a weight space time up to 1.3 h) and evaluates the time on stream evolution of the yields of H 2 , gaseous byproducts (CO, CO 2 , CH 4 , C 2 H 4 , C 2 H 4 O), and formed carbon/coke. The results are explained taking into consideration the thermodynamics, the extent of each individual reaction, and the catalyst deactivation. Up to 600 °C, the predominant intermediate in the H 2 formation is C 2 H 4 (formed by ethanol dehydration) with the preferential formation of nanostructured carbon (nanotubes/ filaments) by C 2 H 4 decomposition. The deposition of this type of carbon partially deactivates the catalyst, mainly affecting the extent of the C 2 H 4 decomposition causing a sharp decrease in the H 2 and carbon yields. Nevertheless, the catalyst reaches a pseudosteady state with an apparent constant activity for other reactions in the kinetic scheme. At 650 °C, C 2 H 4 O (formed by the ethanol dehydrogenation) is the main intermediate in the H 2 formation, which is the precursor of an amorphous/turbostratic carbon (coke) formation that initially causes a rapid deactivation of the catalyst, affecting the ethanol dehydration and, to a lower extent, the reforming and water gas shift reactions. The increase in the S/E ratio favors the H 2 formation, attenuates the catalyst deactivation due to the suppression of the ethanol dehydration to C 2 H 4 , and promotes the reforming, water gas shift, and carbon/coke gasification reactions. A H 2 yield of 85% stable for 48 h on stream is achieved at 600 °C, with a space time of 0.1 h and an S/E ratio of 9.

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Section: Introductionmentioning

confidence: 99%

“…These carbon materials are valuable products for many applications in electronics, biomedicine, catalysis, and hydrogen storage. 36 − 39 He et al 40 prepared carbon nanotubes from steam reforming of pyrrole over Ni–Fe/Ni foam catalysts with excellent electrochemical performance for their use as supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Global Vision of the Reaction and Deactivation Routes in the Ethanol Steam Reforming on a Catalyst Derived from a Ni–Al Spinel

Iglesias-Vázquez,

Valecillos,

Remiro

et al. 2024

Energy Fuels

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“…7−9 MOFs exist in the form of powder crystallites, which are widely used in energy storage and transfer, pollution control, and other industrial processes. 10 For instance, in industrial production, 11 waste gas 12 is continuously discharged, thereby continuously intensifying air pollution. 13 Traditional methods use modified silica to capture SOx/NOx and CO 2 ; however, the deactivation of toxic chemical adsorbents and amine adsorption sites and amination of solids can adversely affect adsorbents, as an alternative to traditional porous materials.…”

Section: Introductionmentioning

confidence: 99%

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

Liu

et al. 2023

Energy Fuels

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Metal−organic frameworks (MOFs) have attracted considerable attention owing to their large surface area and high structural tunability, which lead to a wide range of applications. Owing to excellent properties of MOFs in various applications, the synthesis process of MOFs has been gradually developed with high yields and stable shapes to fulfill industrial requirements. However, the industrial usage of traditional powder-formed MOFs is limited because powder may lead to safety issues and disperse easily. Therefore, MOFs with different shapes and standard properties are required for applications. This review has summarized currently reported methods for shaping MOFs, e.g., binder-based, high-pressure, surfactant-assisted, supercritical CO 2 (scCO 2 ), and sol−gel processes. The industrial applications based on shaped MOFs are summarized to support future studies on the formation of MOFs with stable shapes.

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Synthesis of sustainable aviation biofuels via catalytic hydropyrolysis of lignin

Li,

Meng,

Yin

et al. 2024

Applied Catalysis B: Environment and Energy

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Self-assembly of CNTs@Ni foam electrode material and its activation effect during catalytic reforming of bio-oil model compound for hydrogen at different temperatures

Cited by 5 publications

References 31 publications

Global Vision of the Reaction and Deactivation Routes in the Ethanol Steam Reforming on a Catalyst Derived from a Ni–Al Spinel

Global Vision of the Reaction and Deactivation Routes in the Ethanol Steam Reforming on a Catalyst Derived from a Ni–Al Spinel

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

Synthesis of sustainable aviation biofuels via catalytic hydropyrolysis of lignin

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