Catalytic performances of Ni-based catalysts on supercritical water gasification of phenol solution and coal-gasification wastewater

Wang, Yuzhen; Zhu, Yanan; Liu, Zhuan; Wang, Laibin; Xu, Donghai; Fang, Changqing; Wang, Shuzhong

doi:10.1016/j.ijhydene.2018.08.218

Cited by 38 publications

(6 citation statements)

References 34 publications

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“…Blank concentrations amounted to 11.5 ± 6.5 ng L −1 (LOD 101Ru = 1.08 ng L −1 , see Table S1 † ), obtained by analysing the process water after SCWG of a 10 wt% glycerol solution over the AC support only. Similar metal loss trends were observed for Ni/AC and Ni/γ-Al 2 O 3 by Wang et al 58 when gasifying phenol in the presence of O 2 (480 °C, 25 MPa). Ni concentrations were in the range of 10–15 mg L −1 after 1 h TOS, before stabilising around 1 mg L −1 after 30 h. Li et al 59 observed the same trend for Ni/α-Al 2 O 3 when gasifying glycerol (425 °C, 25 MPa), with initial and final (24 h TOS) Ni losses of 280 and 10 mg L −1 , respectively.…”

Section: Resultssupporting

confidence: 84%

Investigating active phase loss from supported ruthenium catalysts during supercritical water gasification

Hunston

Baudouin

Tarik

et al. 2021

Catal. Sci. Technol.

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Section: Resultssupporting

confidence: 84%

Investigating active phase loss from supported ruthenium catalysts during supercritical water gasification

Hunston

Baudouin

Tarik

et al. 2021

Catal. Sci. Technol.

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“…CNT is another carbon-based support that has a large surface area, high heat conductivity, excellent chemical and physical stability, and a tunable porous structure. Among SCWS-prepared metal-impregnated carbon catalysts, CNT-based catalysts showed higher activities and stability than active carbon and Al 2 O 3 supported catalysts [ 97 ]. At reaction conditions of 480 °C, 25 MPa, and 10–50 h, Ni/CNT resulted in the highest H 2 , CO, CH 4 , and total gas yields, followed by Ni/AC, Ni/Al 2 O 3 , and Ni catalysts.…”

Section: Novel Carbon-based Catalysts Used In Hydrothermal Gasificationmentioning

confidence: 99%

A Review of the Design and Performance of Catalysts for Hydrothermal Gasification of Biomass to Produce Hydrogen-Rich Gas Fuel

et al. 2023

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Supercritical water gasification has emerged as a promising technology to sustainably convert waste residues into clean gaseous fuels rich in combustible gases such as hydrogen and methane. The composition and yield of gases from hydrothermal gasification depend on process conditions such as temperature, pressure, reaction time, feedstock concentration, and reactor geometry. However, catalysts also play a vital role in enhancing the gasification reactions and selectively altering the composition of gas products. Catalysts can also enhance hydrothermal reforming and cracking of biomass to achieve desired gas yields at moderate temperatures, thereby reducing the energy input of the hydrothermal gasification process. However, due to the complex hydrodynamics of supercritical water, the literature is limited regarding the synthesis, application, and performance of catalysts used in hydrothermal gasification. Hence, this review provides a detailed discussion of different heterogeneous catalysts (e.g., metal oxides and transition metals), homogeneous catalysts (e.g., hydroxides and carbonates), and novel carbonaceous catalysts deployed in hydrothermal gasification. The article also summarizes the advantages, disadvantages, and performance of these catalysts in accelerating specific reactions during hydrothermal gasification of biomass, such as water–gas shift, methanation, hydrogenation, reforming, hydrolysis, cracking, bond cleavage, and depolymerization. Different reaction mechanisms involving a variety of catalysts during the hydrothermal gasification of biomass are outlined. The article also highlights recent advancements with recommendations for catalytic supercritical water gasification of biomass and its model compounds, and it evaluates process viability and feasibility for commercialization.

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“…Based on this property, because of hydrolysis as the most typical ionic reaction, many scholars studied the hydrolysis of organics such as indole, phenol and guaiacol under subcritical conditions [53][54][55]. Biomass resources (such as lignin and microalgae) and wastes (such as sludge and chemical wastewater) were also gasified or partially oxidized under subcritical conditions to produce bio-oil or hydrogen and thus realize clean utilization of biomass and resource utilization of pollutants [56][57][58][59][60][61]. K w , however, drops sharply above the critical point.…”

Section: Ionic Reactions and Free Radical Reactionsmentioning

confidence: 99%

Review on Mechanisms and Kinetics for Supercritical Water Oxidation Processes

Jiang

Wang

et al. 2020

Applied Sciences

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Supercritical water oxidation (SCWO) is a promising wastewater treatment technology owing to its various advantages such as rapid reactions and non-polluting products. However, problems like corrosion and salt decomposition set obstacles to its commercialization. To address these problems, researchers have been developing the optimal reactor design and strengthening measures based on sufficient understandings of the degradation kinetics. The essence of the SCWO process and the roles of oxygen and hydrogen peroxide are summarized in this work. Then, the research status and progress of empirical models, semi-empirical models, and detailed chemical kinetic models (DCKMs) are systematically reviewed. Additionally, this paper is the first to summarize the research progress of quantum chemistry and molecular dynamics simulation. The challenge and further development of kinetics models for the optimization of reactors and the directional transformation of pollutants are pointed out.

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Catalytic performances of Ni-based catalysts on supercritical water gasification of phenol solution and coal-gasification wastewater

Cited by 38 publications

References 34 publications

Investigating active phase loss from supported ruthenium catalysts during supercritical water gasification

Investigating active phase loss from supported ruthenium catalysts during supercritical water gasification

A Review of the Design and Performance of Catalysts for Hydrothermal Gasification of Biomass to Produce Hydrogen-Rich Gas Fuel

Review on Mechanisms and Kinetics for Supercritical Water Oxidation Processes

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