Rapid separation and large-scale synthesis of β-FeOOH nanospindles for direct coal liquefaction

Sheng, Jianping; Байкенов, М. И.; Liang, Xiaoyu; Rao, Xuehui; Ma, Fengyun; Su, Xintai; Zhang, Yi

doi:10.1016/j.fuproc.2017.05.019

Cited by 12 publications

(6 citation statements)

References 36 publications

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“…Thus, developing active and durable heterogeneous catalysts has been extensively studied. However, until now, most reported heterogeneous catalysts were usually composed of noble metals, which limits their applications. , Consequently, great efforts have been made to develop heterogeneous catalysts based on earth-abundant and inexpensive elements, for example, transition-metal chalcogenide, carbide, nitride, and phosphide. , Among them, metallic cobalt-based catalysts have been widely investigated. , For example, Co 4 N holds great promise as a new material for catalysis, because of its incorporation of N atoms into the interstices of cobalt unit cells. It exhibits high electrical conductivities, great magnetic properties, high intrinsic activity, and so on. , Xie and co-workers reported a Co 4 N porous nanowire array, which offered excellent catalytic activity toward oxygen evolution reaction (OER), owing to its intrinsically superior electrical conductivity .…”

Section: Introductionmentioning

confidence: 99%

MOF-Templated Fabrication of Hollow Co₄N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

Sheng¹,

Wang²,

Liu

et al. 2018

ACS Appl. Mater. Interfaces

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133

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Metallic CoN catalysts have been considered as one of the most promising non-noble materials for heterogeneous catalysis because of their high electrical conductivity, great magnetic property, and high intrinsic activity. However, the metastable properties seriously limit their applications for heterogeneous water phase catalysis. In this work, a novel Co-metal-organic framework (MOF)-derived hollow porous nanocages (PNCs) composed of metallic CoN and N-doped carbon (NC) were synthesized for the first time. This hollow three-dimensional (3D) PNC catalyst was synthesized by taking advantage of Co-MOF as a precursor for fabricating 3D hollow CoO@C PNCs, along with the NH treatment of Co-oxide frames to promote the in situ conversion of Co-MOF to CoN@NC PNCs, benefiting from the high intrinsic activity and electron conductivity of the metallic CoN phase and the good permeability of the hollow porous nanostructure as well as the efficient doping of N into the carbon layer. Besides, the covalent bridge between the active CoN surface and PNC shells also provides facile pathways for electron and mass transport. The obtained CoN@NC PNCs exhibit excellent catalytic activity and stability for 4-nitrophenol reduction in terms of low activation energy (E = 23.53 kJ mol), high turnover frequency (52.01 × 10 molecule g min), and high apparent rate constant (k = 2.106 min). Furthermore, its magnetic property and stable configuration account for the excellent recyclability of the catalyst. It is hoped that our finding could pave the way for the construction of other hollow transition metal-based nitride@NC PNC catalysts for wide applications.

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Section: Introductionmentioning

confidence: 99%

MOF-Templated Fabrication of Hollow Co₄N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

Sheng¹,

Wang²,

Liu

et al. 2018

ACS Appl. Mater. Interfaces

Self Cite

133

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“…Compared with the abiotic reaction system, the amorphous Fe 2 O 3 pattern of the product in the biological reaction systems was much weaker. However, the potential presence of FeOOH was indicated by the diffraction peaks at 2 θ values of 36.6 and 53.2° . Strong diffraction peaks were observed at 43.1 and 81.5°, which was identified as FeSb 2 O 6 with JCPDS Card No.…”

Section: Resultsmentioning

confidence: 99%

A mechanistic analysis of the influence of iron‐oxidizing bacteria on antimony (V) removal from water by microscale zero‐valent iron

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Microscale zero‐valent iron (mZVI) is an efficient material for removing heavy metals from water, and iron‐oxidizing bacteria are the primary microorganisms responsible for iron corrosion. We investigated the effects of Sphaerotilus natans on antimony [Sb(V)] removal by mZVI using batch experiments. RESULTS At an initial Fe0 dose of 0.1 g L–1, 40 mg L–1 Sb(V) was almost completely removed in an abiotic system. Although S. natans exhibited significant tolerance to Sb(V), its ability to adsorb Sb(V) was poor. Most importantly, the presence of S. natans reduced the removal rate of aqueous Sb(V) by mZVI by up to 39%. The value of the redox potential in the biologically mediated system was lower than that in the abiotic control, indicating oxygen consumption by S. natans. In the presence of S. natans, the main reaction products were FeOOH and FeSb2O6, compared to Fe2O3 in the abiotic system. Biomineralization of Fe3+ ions by S. natans may have occurred during the experiment, but it did not play a significant role in Sb(V) removal. CONCLUSION mZVI can be efficiently used to remove Sb(V) from water. However, the presence of S. natans may inhibit its removal ability, likely due to the decreased mass transfer and lower corrosion of iron. © 2018 Society of Chemical Industry

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“…In another study, the percentages of total conversion, oil yield, and liquefaction degree with oleic acid coated β-FeOOH were found to be 92.6%, 73.8%, and 80.8%, respectively. It will be possible to increase the efficiency of industrial direct liquefaction processes in the future with these nanocatalysts (Li et al 2012 ; Sheng et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of an innovative SF/NZVI catalyst and investigation of its effectiveness on bio-oil production in liquefaction process alongside other parameters

Ersöz,

Bayrak,

Gündüz

et al. 2024

Environ Sci Pollut Res

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Today, new energy sources alternative to fossil fuels are needed to meet the increasing energy demand. It is becoming increasingly important to constitute new energy sources from waste biomass through the liquefaction process. In this study, walnut shells (WS) were liquefied catalytically and non-catalytically under different parameters using the liquefaction method. In this process, the effect of silica fume/nano zero-valent iron (SF/NZVI) catalysts on the conversion rates was investigated. The catalyst was synthesized by reducing NZVI using a liquid phase chemical reduction method on SF. The SF/NZVI catalyst was characterized by scanning electron microscopy- energy dispersive X-ray (SEM–EDX), transmission electron microscope (TEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. The effect of various process parameters on the liquefaction process was investigated. In this context, the reaction temperature ranged from 300 to 400 °C, the solid/solvent ratio ranged from 1/1 to 1/3, the reaction time ranged from 30 to 90 min, and the catalyst concentration ranged from 1 to 6%. According to the results obtained, the most suitable operating conditions for non-catalytic experiments in liquefaction of WS were found to be temperature of 400 °C, reaction time of 60 min, and solid/solvent of 1/3. In catalytic conditions, the optimum values were obtained as temperature of 375 °C, reaction time of 60 min, solid/solvent ratio of 1/3, and catalyst concentration of 6%. The highest total conversion and (oil + gas) % conversion were 90.4% and 46.7% under non-catalytic conditions and 90.7% and 62.3% under catalytic conditions, respectively. Gas chromatography/mass spectrometry (GC/MS) analysis revealed the bio-oil was mainly composed of aromatic compounds (benzene, butyl-, indane and their derivatives,) and polyaromatic compounds (naphthalene, decahydro-, cis-, naphthalene, 1-methyl-.). The aim of increasing the quantity and quality of the light liquid product in the study has been achieved.

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Rapid separation and large-scale synthesis of β-FeOOH nanospindles for direct coal liquefaction

Cited by 12 publications

References 36 publications

MOF-Templated Fabrication of Hollow Co₄N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

MOF-Templated Fabrication of Hollow Co₄N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

A mechanistic analysis of the influence of iron‐oxidizing bacteria on antimony (V) removal from water by microscale zero‐valent iron

Synthesis of an innovative SF/NZVI catalyst and investigation of its effectiveness on bio-oil production in liquefaction process alongside other parameters

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Rapid separation and large-scale synthesis of β-FeOOH nanospindles for direct coal liquefaction

Cited by 12 publications

References 36 publications

MOF-Templated Fabrication of Hollow Co4N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

MOF-Templated Fabrication of Hollow Co4N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

A mechanistic analysis of the influence of iron‐oxidizing bacteria on antimony (V) removal from water by microscale zero‐valent iron

Synthesis of an innovative SF/NZVI catalyst and investigation of its effectiveness on bio-oil production in liquefaction process alongside other parameters

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Product

Resources

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MOF-Templated Fabrication of Hollow Co₄N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity

MOF-Templated Fabrication of Hollow Co₄N@N-Doped Carbon Porous Nanocages with Superior Catalytic Activity