Removal of mercaptan from natural gas condensate using N-doped carbon nanotube adsorbents: Kinetic and DFT study

Meshkat, Seyyed Salar; Rashidi, Alimorad; Tavakoli, Omid

doi:10.1016/j.jngse.2018.04.036

Cited by 27 publications

(16 citation statements)

References 31 publications

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“…Using a different approach, but of similar rationale as in the case of graphene, Meshkat et al doped CNTs with N atoms and tested them for the removal of tertiary butyl mercaptan (TBM) from n-heptane [36].…”

Section: Carbon Nanotube Applicationsmentioning

confidence: 99%

Carbon Nanomaterials for the Adsorptive Desulfurization of Fuels

Svinterikos

Zuburtikudis

Al-Marzouqi

2019

Journal of Nanotechnology

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The increasing demand for cleaner fuels and the recent stringent regulations of commercial fuel specifications have driven the research of alternative methods to upgrade the current industrial desulfurization technology. Adsorptive desulfurization, the removal of refractory sulfur compounds using appropriate selective tailor-made adsorbents, has shown up as a promising alternative in the recent years. Carbon nanomaterials, namely, graphene, graphene oxide, carbon nanotubes and carbon nanofibers, show a significant potential as desulfurization adsorbents. Their surface area and porosity, their ability of easy functionalization, and their suitability to serve as a support of different types of adsorbents have rendered them attractive candidates for this purpose. In this review, after a presentation of the current industrial desulfurization practice and its limitations, the structure and properties of the carbon nanomaterials of interest will be described, followed by a detailed account of their applications in adsorptive desulfurization. The major literature findings and conclusions will be presented and discussed as a road map for future research in the field.

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Section: Carbon Nanotube Applicationsmentioning

confidence: 99%

Carbon Nanomaterials for the Adsorptive Desulfurization of Fuels

Svinterikos

Zuburtikudis

Al-Marzouqi

2019

Journal of Nanotechnology

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“…In Eq. 6, the linear form of the Langmuir model [1,22] is given, which in the Langmuir model, the adsorption process is assumed to do on a homogeneous surface by monolayer adsorption:…”

Section: Isotherm Studymentioning

confidence: 99%

“…As known, the Freundlich model [1,22] assumes the multilayer with reversible adsorption on the non-uniform distribution of the active site. Equation 7 includes the linear form of the Freundlich model.…”

Section: Isotherm Studymentioning

confidence: 99%

“…The Tempkin isotherm constant, A T in l/g, and B in J/mol are related to the heat of adsorption. In Tempkin isotherm assumption, the interaction between the adsorbate and adsorbent is highlighted [1,22]:…”

Section: Isotherm Studymentioning

confidence: 99%

“…In Fig. 2, the peaks at 2θ = 24.9, 42.1°, indicating the CNT materials prepared by the CVD method [22][23][24][25][26][27][28][29][30]. The only difference between the CNT and COOH-CNT pattern is the broadening of the peaks.…”

Section: Characterization Of Adsorbentsmentioning

confidence: 99%

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Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

2019

Self Cite

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The present work considers an adsorptive removal of Indigo carmine (IC) dye onto nanotube carbon (CNTs). The pure CNTs were prepared via chemical vapor deposition (CVD) method utilizing methane gas as a carbon source at 1000 °C in a quartz tube. The morphology and surface chemical structure of the adsorbents were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption/desorption technique, and thermal gravity analysis (TGA). The parameters of the IC dye adsorption, such as initial concentration, contact time, pH, and mass-loaded adsorbent, were evaluated. The kinetic study confirmed that a pseudo-second-order model was best fitted to the adsorption data. The removal efficiency of adsorption onto pure and COOH-functionalized CNTs was 84% and 98.7% at 15 min, respectively. The equilibrium results were fitted well to the Langmuir isotherm model. The adsorption capacity of the CNT and COOH-CNT was 88.5 and 136 mg/g, respectively. The reusability of the adsorbents was studied, and after eight cycles, the efficiency decreased to 70%. Moreover, the density functional theory calculations confirmed that the functionalization of CNTs with COOH groups improves the adsorption properties of IC due to the formation of hydrogen-bonding interactions.

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Hazardous Metallic Ions Removal from Water Using Activated Carbons

González¹

2019

Encyclopedia of Water

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Lignocellulosics and biomass as precursors of activated carbons have become important materials to produce it. Use of these “wastes” results in many benefits, mainly environmental. Special attention must be given to the relationship between the selected precursor and the final microstructure and properties (surface and textural) of the carbons. From these characteristics depends their performance as adsorbents of heavy metals or other applications. For these reasons, the present article provides a summary of research works outlining the use of lignocellulosic‐based precursors to obtain activated carbons. A brief description of the characterization techniques for both the precursors and activated carbons is presented. An explanation of the adsorption process, in terms of the most common kinetic and adsorption models, is included. Finally, the application of these carbons in adsorption of five hazardous metallic ions, chromium, mercury, lead, copper, and zinc, in aqueous solution is analyzed.

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Removal of mercaptan from natural gas condensate using N-doped carbon nanotube adsorbents: Kinetic and DFT study

Cited by 27 publications

References 31 publications

Carbon Nanomaterials for the Adsorptive Desulfurization of Fuels

Carbon Nanomaterials for the Adsorptive Desulfurization of Fuels

Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

Hazardous Metallic Ions Removal from Water Using Activated Carbons

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