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Journal of industrial and engineering chemistry
The Korean Society of Industrial and Engineering Chemistry
Journal of industrial and engineering chemistry

The Korean Society of Industrial and Engineering Chemistry

1226-086X

Journal of industrial and engineering chemistry/Journal Journal of industrial and engineering chemistrySCIEICCRAHCI
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    Double-shelled hybrid MgFe2O4/Fe2O3 hollow microspheres as a high-capacity anode for lithium-ion batteries

    Lee S.B.Balasubramaniam R.
    12页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryTernary metal oxides Fe2O3 and MgFe2O4 have attracted considerable attention as lithium anode materials owing to their high theoretical capacities, environmental friendliness, and low cost; however, their rapid capacity decay and large volume expansion inhibit their lithium storage performance. Herein, we synthesize hybrid MgFe2O4/Fe2O3 hollow microspheres (MFO/FO-HS) hydrothermally, via the polyol reaction of ethylene glycol, followed by calcination at different temperatures. The surface morphology was tuned by adjusting the calcination temperature, assisted by inward and outward Ostwald ripening. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis were performed to investigate the physio-chemical properties of the prepared samples. The sample calcined at 450 °C exhibited an excellent electrochemical performance and retained a reversible capacity of 1390 mAh g?1 after 160 cycles, indicating the significant role of calcination temperature in tuning the structural and electrochemical properties of anode materials. The double-shelled hollow microspheres inhibit rapid capacity decay and prevent severe volume expansion during the electrochemical process. This work opens new paths toward constructing an electrode material with a high electrochemical performance.
      原文链接:
    • NSTL
    • Elsevier

    Comprehensive evaluation of 3A, 4A, 5A, and 13X zeolites for selective 1-octene adsorption over n-octane

    Kim J.Yoo C.-Y.Jung T.Cho D.-W....
    12页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryAmong linear α-olefins, 1-octene is widely used as a starting material in the industrial production of plastics, oils, waxes, and surfactants. The adsorption separation of gaseous olefin/paraffin using various adsorbents has been extensively studied; however, detailed studies on the adsorption separation of liquid-phase olefin/paraffin are scant. In this study, we systematically investigated the selective adsorption of 3A, 4A, 5A, and 13X bead-shaped zeolites from 1-octene/n-octane liquid binary mixture as a function of type and weight of the zeolites. Batch-type adsorption experiments were performed in the 1-octene volume fraction range of 10–90 %. The results show that 5A and 13X zeolites are promising adsorbents for selective 1-octene adsorption owing to the preferential adsorption of 1-octene on the cation sites in the micropore. Contrastingly, both 1-octene and n-octane cannot enter 3A and 4A micropores, resulting in negligible preferential adsorption of 1-octene over n-octane. The Langmuir constant of 5A is higher than that of 13X due to the stronger polarization effect of Ca2+ compared to that of Na+, resulting in additional attractive interaction between the adsorbent and 1-octene. The experimental analysis presented in this study provides a solid basis for the development of selective adsorbents for the liquid–liquid separation.
      原文链接:
    • NSTL
    • Elsevier

    Steam reforming of monohydric alcohols and polyalcohols: Influence of single or multiple hydroxyl group(s) on nature of the coke

    Wang Y.Li C.Hu X.Zhang S....
    15页
    查看更多>>摘要：? 2022Alcohols like ethanol and glycerol have been extensively investigated as potential feedstock for on-site hydrogen production by steam reforming. The varied number of hydroxyl group in the alcohols inevitably affects the reaction intermediates generated and eventually properties of coke formed. In this study, four alcohols (ethanol, ethylene glycol, 1-propanol and glycerol) with the single or multiple hydroxyl groups were steam reformed, focusing on the influence of the hydroxyl group on the properties of the coke. The research results showed that steam reforming of ethanol and glycerol produced more coke than that in steam reforming of 1-propanol or ethylene glycol, while the Ni/SBA-15 catalyst deactivated to a higher extent in steam reforming of ethylene glycol or glycerol with multiple hydroxyl group, due to the coke of varied properties. The coke produced by steam reforming of ethanol and 1-propanol contained more defective structures but more aromatic. However, the generated coke from the steam reforming of ethylene glycol and glycerol had more aliphatic structures, especially in that from ethylene glycol. On the other hand, the carbon nanotubes formed by the steam reforming of ethanol or 1-propanol had thin wall thickness and smooth surface, while that in steam reforming of ethylene glycol and glycerol had thick wall and very rough surface, resulting from the distinct reaction intermediates formed.
      原文链接:
    • NSTL
    • Elsevier

    Optimal operating strategy of ash deposit removal system to maximize boiler efficiency using CFD and a thermal transfer efficiency model

    Park H.Lee J.Lim J.Cho H....
    17页
    查看更多>>摘要：? 2022 The Author(s)Ash deposits generated during the combustion process on the outer tube surface of a boiler reduces the boiler's efficiency. In most boilers, ash deposits are physically removed with high-pressure steam using an ash deposit removal system, sootblower. However, most sootblowers spray steam with excessive pressure, without considering the characteristics of the ash deposit, resulting in problems such as waste of steam energy and damage to equipment. In addition, an optimal operation strategy based on the position of the sootblower and the injection angle of the steam nozzle are not considered, leading to a lowered efficiency of ash deposit removal and steam waste. Hence, this study proposes a novel method to determine the optimal operating conditions of a sootblower using computational fluid dynamics (CFD) and a thermal transfer efficiency model considering the properties of the ash deposits. This method was developed based on a commercial recovery boiler, and consists of (i) a sootblowing steam velocity model that considers the ash deposit characteristics, (ii) a three-dimensional CFD model considering the interior design of the boiler, and (iii) a thermal transfer efficiency model that calculates the thermal resistance depending on the amount of ash deposit removed. Case studies were performed to calculate the amount of ash deposit removed for various ash deposit thicknesses, and sootblower positions and angles using this methodology. The boiler heat transfer efficiency was calculated using the calculated ash deposit removal amount and thermal transfer efficiency model, and the optimum operating conditions for the sootblower with the optimum heat transfer efficiency were derived. This study presents a guideline for efficiently operating sootblowers according to the ash deposit characteristics, and can be applied not only to recovery boilers but also to other boilers in which ash deposits are generated.
      原文链接:
    • NSTL
    • Elsevier

    Enhanced separation for paraffin wax using CO2-responsive emulsions based on switchable hydrophilicity solvents

    Qi J.Li X.Wang J.Lu H....
    11页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryWax precipitation leads to destructive harms in the exploitation and transportation of petroleum. Solvent treatments can remove paraffin wax easily but the separation of solvent relying on distillation is admitted inefficient. Aiming at enhancing the separation and recovery performance of paraffin wax, CO2-responsive emulsion (SHS/W emulsion) based on switchable hydrophilicity solvents (SHS) is adopted. Since the paraffin wax is dissolved, emulsified, and dispersed by SHS/W emulsion, SHS/W emulsion exhibits better removal performance than SHS. The paraffin wax is recovered effectively upon introducing CO2, which attributes to the transformation of SHS from hydrophobic to hydrophilic state. Compared with the SHS system, the recovery of paraffin wax is improved obviously by introducing surfactant Span80. Owing to the deprotonation of SHS by bubbling N2 and heating, 77.6% SHS is recycled after recovering paraffin wax. Here, the recycled SHS can be used to realize the removal of paraffin wax again. Thus, it is a promising and alternative strategy for realizing the sustainable and rapid removal of paraffin wax in the petroleum industry.
      原文链接:
    • NSTL
    • Elsevier

    Fundamental and recent progress on the strengthening strategies for fabrication of polyacrylonitrile (PAN)-derived electrospun CNFs: Precursors, spinning and collection, and post-treatments

    Soltani S.Shean Yaw Choong T.Khanian N.Roodbar Shojaei T....
    16页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryThus far, polyacrylonitrile (PAN)-derived electrospun CNFs with smooth and uniform cross-sections with various morphologies and structures were massively fabricated. There is no denying the fact that the mechanical strength of CNFs is restricted which has been the main obstacle toward being highly applicable for a broad range of applications. Based on recent fundings, these limitations can be simply overcome over different synthesis stages consisting of the precursor strategy, spinning and collection methods, post-treatment processes such as stretching and aligning, and complex post-thermal procedures like stabilization and carbonization. This paper aims to fundamentally review the mechanical characteristics of CNF nanocomposites and systematically summarize the possible strengthening strategies for further development over every stage of the fabrication procedure.
      原文链接:
    • NSTL
    • Elsevier

    Formation of polynuclear iron(III) complexes of N-(2-pyridylmethyl)iminodipropanol depending on pseudohalide ions: synthesis, crystal structure, and magnetic properties

    Shin H.J.Min K.S.Jang Y.J.Zenno H....
    12页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryFive polynuclear iron(III) complexes, [(pmidp)Fe(NCSe)]2 (1), [(pmidp)Fe(NCBH3)]2 (2), [(Hpmidp/pmidp)Fe3(CH3O)2(NCS)4]?H2O (3), [(pmidp)2Fe6(CH3O)4(N3)4(CH3COO)2O2] (4), and [(pmidp)2Fe6(CH3O)4(NCO)4(CH3COO)2O2]?2MeOH (5) were isolated through the reactions of N-(2-pyridylmethyl)iminodipropanol (H2pmidp) and iron(III) ions with different pseudohalide ions. The complexes were studied via X-ray crystal diffraction, M?ssbauer spectra, and magnetochemistry. The molecular structures of 1 and 2 were formed as the {Fe2(μ2-Opropoxo)2}2+ cores with pmidp2? and NCSe?/NCBH3?. The structure of 3 was formed as a {Fe3(μ2-OCH3)2(μ2-Opropoxo)4}5+ core with Hpmidp?/pmidp2? and NCS?. The structures of 4 and 5 were formed as {Fe6(μ4-O)2(μ2-OCH3)2(η2-OAc)2(μ2-Opropoxo)4} cores with pmidp2? and NCO?/N3?. Structural analyses revealed that the formation of various multinuclear iron(III) moieties depends on the auxiliary ligands. The oxidation states of all the complexes were confirmed as + 3 using the bond valence sum (BVS) calculations and M?ssbauer spectral data. The susceptibility data for 1–5 fitted using each spin coupling (J) model indicated that 1–3 showed antiferromagnetic exchange interactions, and 4 and 5 showed the ferromagnetic and antiferromagnetic couplings, simultaneously.
      原文链接:
    • NSTL
    • Elsevier

    Acetalization of glycerol over sulfated UiO-66 under mild condition

    Jiang Y.Zhou R.Ye B.Hou Z....
    10页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistrySulfated metal–organic framework has attracted much attention as a versatile heterogeneous acid for its strong acid strength, large surface area and regular pore channels. In this work, sulfated UiO-66 (UiO-SO3H-x) was prepared via the direct oxidation of 2-mercaptobenzoic acid substituted UiO-66. The structure and property of the synthesized UiO-SO3H-x were characterized via XRD, FTIR, static water contact angles, XPS, TG-DTA, N2 adsorption–desorption, SEM and TEM in detail. It was found that sulfonic acid groups dispersed homogenously in the framework of UiO-SO3H-x. And UiO-SO3H-0.2 exhibited excellent performance and stability for the synthesis of solketal from surplus glycerol among the tested solid acids (H3PW12O40, Amberlyst-45, HY, HBEA, HZSM-5 and ZrHP). The detected conversion of glycerol reached 70.3% with a 99.8% selectivity toward solketal at 60 °C, and it could maintain its initial activity in five recycles. The highest TOF of each acid site in UiO-SO3H-0.2 reached 676.0 h?1. Moreover, it was versatile for the acetalization of glycerol with other ketones/aldehydes.
      原文链接:
    • NSTL
    • Elsevier

    Experimental and computational investigation of two-component mixtures for the alkyl (ethyl, propyl and butyl) oleate in supercritical carbon dioxide

    Dhamodharan D.Park C.-W.Ghoderao P.N.P.Byun H.-S....
    8页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryThe main aim of the current study is to understand of solubility curve in solvents at supercritical conditions and including thermodynamics modeling, as well as van der Waals-type models. A thermodynamic approach was commissioned to predict the solubility of a model alkyl oleate monomers in supercritical carbon dioxide (Sc-CO2). Furthermore, the experimental data of phase equilibrium were employed here which are based on measuring the solubility of alkyl oleate monomers in CO2 at supercritical conditions, and the experiments were performed using common synthetic-type method. The thermodynamic equilibrium properties for the two-component mixture of ethyl oleate, propyl oleate and butyl oleate in Sc-CO2 were reported. Bubble (dew)-point data determinations were performed through the synthetic method from various temperatures T= (313.2 to 393.2) K and pressures p = (3.07 to 31.71) MPa. The obtained results indicated that the phase equilibria of Sc-CO2 were found to increase monotonically with the augmented of system temperatures and mole fraction of (ethyl oleate, propyl oleate and butyl oleate) in binary (solute + solvent) mixtures. The solubility curve of ethyl oleate, propyl oleate, and butyl oleate in the ethyl oleate + Sc-CO2, propyl oleate + Sc-CO2, and butyl oleate + Sc-CO2 models rises as the temperature raises at a persistent pressure. The ethyl oleate + Sc-CO2, propyl oleate + Sc-CO2, and butyl oleate + Sc-CO2 models show type-I phase behavior. Moreover, laboratory investigated results of these systems were adequately compared with the P-R EOS. RMSD for the ethyl oleate + Sc-CO2 [κij = 0.060, ηij=-0.030], propyl oleate + Sc-CO2 [κij = 0.062, ηij=-0.030], and butyl oleate + Sc-CO2 [κij = 0.061, ηij=-0.030] models using 2 factors determined at 353.2 K were 4.06 %, 7.43 %, and 5.06 % correspondingly. Also, RMSD of ethyl oleate + Sc-CO2, propyl oleate + Sc-CO2, and butyl oleate + Sc-CO2 systems predicted by adjusted factors at each temperature was 8.46 %, 9.43 %, and 6.29 %, respectively.
      原文链接:
    • NSTL
    • Elsevier

    Steel scale-CaO composite catalyst for coke combustion and in-situ NO and SO2 removal

    Zhang L.Yan J.Lei Z.Cao X....
    7页
    查看更多>>摘要：? 2022 The Korean Society of Industrial and Engineering ChemistryThe performance of the steel scale (SS)-CaO composite on the combustion of coke nuts and in-situ reduction of SO2 and NO emission was investigated. Combustion experiments show that SS-CaO composite accelerates coke combustion and reduces SO2 and NO emissions concurrently. X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron spin resonance (ESR) were used to investigate the catalysis mechanism. Results show that SS and CaO have synergistic effect in in-situ denitration. The increase of SS and CaO fraction in the composites improve the denitration and sulfur fixation performance, respectively. The denitration activity is mainly attributed to the Fe2O3 in SS and Ca2Fe2O5 formed during combustion. The desulfurization is due to the sulfur fixation with CaO. The increasing fraction of CaO in the composites leads to the agglomeration of ash particles. 2%CaO is confirmed as the optimum addition for catalytic combustion and emission reduction. This work sheds light on the cheap and effective catalysts that are potentially useful for iron ore sintering.
      原文链接:
    • NSTL
    • Elsevier