Iron and chromium-based oxides for residual methane abatement under realistic conditions: A study on sulfur dioxide poisoning and steam-induced inhibition

García-Vázquez, Miguel; Wang, Ke; González-Carballo, Juan M.; Brown, D. J. A.; Landon, Philip; Tooze, Robert P.; García-García, Francisco J.

doi:10.1016/j.apcatb.2020.119139

Cited by 22 publications

(22 citation statements)

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“…And because the FeCr 2 O 4 spinel phase can still exits after being aged under wet conditions, the Fe 60 Cr 40 showed the better catalyst conversion of CH 4 than α-Fe 2 O 3 catalyst, which can also be found by comparing Figures 9A,B (312 ppm CH 4 + 4.6 ppm SO 2 10% vol H 2 O balanced in air, T = 450°C, conversion = 47% vs. 26%). In addition, as has been represented in Figure 9C , the competitive adsorption of hydroxide groups on FeCr 2 O 4 even slows down the rate at which sulfur dioxide poisons the catalyst’s active sites ( García-Vázquez et al, 2020 ).…”

Section: Transition Metal Oxides For Catalytic Ch 4 ...mentioning

confidence: 95%

“…Although α-Fe 2 O 3 catalysts, especially with two-dimensional nanostructure, have been proven to have excellent catalytic performance in CMC, their performance is significantly reduced in the presence of steam and SO 2 . Herein, we can further investigate Fe–Cr mixed catalysts with the emphasis on the creation of spinel structures to increase the sulfur and water resistance of iron-based catalysts ( García-Vázquez et al, 2020 ).…”

Section: Perspectivesmentioning

confidence: 99%

“…FIGURE 9Proposed poisoning mechanisms at 450 °C under (A) sulfurfree conditions, (B) dry conditions, and (C) wet conditions. Cited fromGarcía-Vázquez et al (2020).…”

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confidence: 99%

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Recent progress of catalytic methane combustion over transition metal oxide catalysts

et al. 2022

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Methane (CH4) is one of the cleanest fossil fuel resources and is playing an increasingly indispensable role in our way to carbon neutrality, by providing less carbon-intensive heat and electricity worldwide. On the other hand, the atmospheric concentration of CH4 has raced past 1,900 ppb in 2021, almost triple its pre-industrial levels. As a greenhouse gas at least 86 times as potent as carbon dioxide (CO2) over 20 years, CH4 is becoming a major threat to the global goal of deviating Earth temperature from the +2°C scenario. Consequently, all CH4-powered facilities must be strictly coupled with remediation plans for unburned CH4 in the exhaust to avoid further exacerbating the environmental stress, among which catalytic CH4 combustion (CMC) is one of the most effective strategies to solve this issue. Most current CMC catalysts are noble-metal-based owing to their outstanding C–H bond activation capability, while their high cost and poor thermal stability have driven the search for alternative options, among which transition metal oxide (TMO) catalysts have attracted extensive attention due to their Earth abundance, high thermal stability, variable oxidation states, rich acidic and basic sites, etc. To date, many TMO catalysts have shown comparable catalytic performance with that of noble metals, while their fundamental reaction mechanisms are explored to a much less extent and remain to be controversial, which hinders the further optimization of the TMO catalytic systems. Therefore, in this review, we provide a systematic compilation of the recent research advances in TMO-based CMC reactions, together with their detailed reaction mechanisms. We start with introducing the scientific fundamentals of the CMC reaction itself as well as the unique and desirable features of TMOs applied in CMC, followed by a detailed introduction of four different kinetic reaction models proposed for the reactions. Next, we categorize the TMOs of interests into single and hybrid systems, summarizing their specific morphology characterization, catalytic performance, kinetic properties, with special emphasis on the reaction mechanisms and interfacial properties. Finally, we conclude the review with a summary and outlook on the TMOs for practical CMC applications. In addition, we also further prospect the enormous potentials of TMOs in producing value-added chemicals beyond combustion, such as direct partial oxidation to methanol.

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Section: Transition Metal Oxides For Catalytic Ch 4 ...mentioning

confidence: 95%

Section: Perspectivesmentioning

confidence: 99%

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Recent progress of catalytic methane combustion over transition metal oxide catalysts

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“…Before discussing them, the species corresponding to the absorption peaks are described as follows: the bands at 3412 and 1626 cm −1 are attributed to the moisture on the surface of the sample. 86,88 The band at about 1122 cm −1 with a shoulder at 1205 cm −1 is assigned to sulfate species. The band at 1498 cm −1 is attributed to the CC stretching vibration of the toluene aromatic ring, 90,91 while the band at 2957 cm −1 is mainly due to the C-H stretching vibration in CH 3 of toluene.…”

Section: And Technology Papermentioning

confidence: 99%

“…[92][93][94] The bands at 2356 and 2327 cm −1 are ascribed to CO 2 . 88,95 The bands1 at 1736 and 1699 cm −1 could be associated with a CO stretching vibration of aldehyde, esters or carboxylic species. 86 Moreover, the bands corresponding to the antisymmetric and symmetric telescopic vibration of COO − in the benzoate species are detected at 1580 and 1402 cm −1 , and the one at 1540 cm −1 is usually assigned to the antisymmetric vibration of the carboxylate group (COOH − ) in the benzoate species.…”

Section: And Technology Papermentioning

confidence: 99%

Dopant-driven tuning of toluene oxidation and sulfur resistance at the B-site of LaCo_1−xM_xO₃ (M = Fe, Cr, Cu) perovskites

Yuan

Yan

et al. 2022

Catal. Sci. Technol.

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Preparation and properties of uncommon Cd‐Mn carboxylate complexes—per se and as precursors for CdMn₂O₄‐based ceramics

Гавриков

Belova

Koroteev

et al. 2021

Applied Organom Chemis

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Carboxycymantrene CymCOOH (Cym = (η5‐C5H4)Mn (CO)3) was applied to assemble a series of uncommon Cd‐Mn carboxylate complexes comprising 1D‐polynuclear [Cd (OOCCym)(acac)]n (1) as well as oligonuclear species, [Cd2(OOCCym)4(EtOH)4)] (2), [Cd (OOCCym)2(bpy)(H2O] (3, bpy = 2,2′‐bipyridine) and [Cd (OOCCym)2(phen)2]·EtOH (4, phen = 1,10‐phenantroline). Compound 2 was found to be a product of irreversible SCSC transition from [Cd2(OOCCym)4(EtOH)3(H2O)]·EtOH (2_100K) initially formed in corresponding syntheses. This transition is accompanied by two‐fold decrease in cell volume and increase in cell symmetry. Recrystallyzation of 2–4 from common organic solvents affects the nuclearity of products (in case of 2 and 3) or subtly alters the structure of [Cd (OOCCym)2(phen)2] units (4). The optimal Cd to Mn ratio inspired studying solid‐state thermal decomposition of 2–4 as a route to CdMn2O4‐based ceramics. As a result, oxide samples with a predominance of tetragonal (Cd1‐xMnx)Mn2O4 spinel have been prepared and characterized by powder XRD, SEM, EDX, and IR revealing the interplay between the preparation technique and the features of morphology and composition. The retaining of Cd to Mn ratio upon recrystallyzation of 2–4 implies possibility of further elaboration of CdMn2O4‐based materials in various morphologies (polycrystalline ones, films, etc.). Notably, 2–4 is also the first series of related heterometallic Cd‐Mn complexes being studied as individual precursors for CdMn2O4‐based oxide systems.

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Iron and chromium-based oxides for residual methane abatement under realistic conditions: A study on sulfur dioxide poisoning and steam-induced inhibition

Cited by 22 publications

References 48 publications

Recent progress of catalytic methane combustion over transition metal oxide catalysts

Recent progress of catalytic methane combustion over transition metal oxide catalysts

Dopant-driven tuning of toluene oxidation and sulfur resistance at the B-site of LaCo_1−xM_xO₃ (M = Fe, Cr, Cu) perovskites

Preparation and properties of uncommon Cd‐Mn carboxylate complexes—per se and as precursors for CdMn₂O₄‐based ceramics

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Iron and chromium-based oxides for residual methane abatement under realistic conditions: A study on sulfur dioxide poisoning and steam-induced inhibition

Cited by 22 publications

References 48 publications

Recent progress of catalytic methane combustion over transition metal oxide catalysts

Recent progress of catalytic methane combustion over transition metal oxide catalysts

Dopant-driven tuning of toluene oxidation and sulfur resistance at the B-site of LaCo1−xMxO3 (M = Fe, Cr, Cu) perovskites

Preparation and properties of uncommon Cd‐Mn carboxylate complexes—per se and as precursors for CdMn2O4‐based ceramics

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Product

Resources

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Dopant-driven tuning of toluene oxidation and sulfur resistance at the B-site of LaCo_1−xM_xO₃ (M = Fe, Cr, Cu) perovskites

Preparation and properties of uncommon Cd‐Mn carboxylate complexes—per se and as precursors for CdMn₂O₄‐based ceramics