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  • 1
    Online Resource
    Online Resource
    Modeling and prediction for the oxidation efficiency of magnesium sulfite in aeration tank of magnesium-based seawater exhaust gas clean system
    SAGE Publications ; 2019
    In:  Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment Vol. 233, No. 1 ( 2019-02), p. 164-173
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, SAGE Publications, Vol. 233, No. 1 ( 2019-02), p. 164-173
    Abstract: In magnesium-based seawater exhaust gas clean system, the desulfurization by-product, magnesium sulfite (MgSO 3 ), has a negative impact on the ecological environment, which needs to be treated to make harmless. Due to the limited space on board, the aeration oxidation method is used to convert it to magnesium sulfate. Because of the variable size, shape and flow field of aeration tank, it is difficult and expensive to design and verify the oxidation efficiency of the aeration tank by experimental method. In this work, in order to predict the oxidation efficiency accurately, RFlow, a computational fluid dynamics software, was used to analyze the flow field and MgSO 3 oxidation reaction in aeration tank. The subdomain technology was adopted for physics modeling and mesh generation of the aeration tank, and the total number of meshes was 285,000. The multi-phase flow field model was set up using the multi-fluid model and dispersive k-ε turbulence model. Under the given initial conditions, the predicted oxidation efficiency was 94.2%. Compared with the results of the actual ship test, the prediction model for MgSO 3 oxidation efficiency of the aeration tank is reliable.
    Type of Medium: Online Resource
    ISSN: 1475-0902 , 2041-3084
    URL: Article
    DOI: 10.1177/1475090217725619
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2089895-2
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  • 2
    Online Resource
    Online Resource
    Modeling and prediction of desulfurization efficiency for magnesium-based seawater exhaust gas clean system
    SAGE Publications ; 2019
    In:  Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment Vol. 233, No. 1 ( 2019-02), p. 325-332
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, SAGE Publications, Vol. 233, No. 1 ( 2019-02), p. 325-332
    Abstract: The desulfurization efficiency is a major parameter of magnesium-based seawater exhaust gas clean system, which is one of the important means to control the sulfur dioxide emission from marine diesel engines. In this work, the RFlow, a computational fluid dynamics software, was used to analyze the flow field and sulfur dioxide absorption rate in the desulfurization tower of magnesium-based seawater exhaust gas clean system. The subdomain technology was applied for physics modeling and mesh generation of the desulfurization tower, and total number of the mesh is 2.25 million. The flow field model was set up by coupling the multi-fluid model with the dispersive k-ε turbulence model. Based on flow field model, the prediction model for desulfurization efficiency of magnesium-based seawater exhaust gas clean system was programmed in user-defined module of the RFlow software, according to the two-film theory and sulfur dioxide absorption reaction equations. The simulation results predicted a desulfurization efficiency of 97.9%, which agrees well with the practical result. In order to study the effect of gas and liquid flow rate on the desulfurization efficiency, the computational fluid dynamics prediction model was applied. And the verification tests were conducted on a container vessel. Comparing the predicted results with the experimental data, the maximum error is less than 2%. It is proved that the prediction model is reliable and useful for the magnesium-based seawater exhaust gas clean system.
    Type of Medium: Online Resource
    ISSN: 1475-0902 , 2041-3084
    URL: Article
    DOI: 10.1177/1475090217744905
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2089895-2
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  • 3
    Online Resource
    Online Resource
    Three‐phase hydration of magnesium oxide using hydration agents
    Wiley ; 2017
    In:  Crystal Research and Technology Vol. 52, No. 6 ( 2017-06)
    Details
    In: Crystal Research and Technology, Wiley, Vol. 52, No. 6 ( 2017-06)
    Abstract: A gas‐liquid‐solid reaction system, named three‐phase reaction system, was firstly used for magnesium oxide (MgO) hydration in our previous research. In this paper, the effect of hydration agents on the MgO hydration in three‐phase reaction system was investigated experimentally. The hydration agents included magnesium acetate, acetic acid, and ammonium chloride. The variations of hydration degree (measured by thermogravimetric analysis), pH value, conductivity of different reaction system were studied. Furthermore, the final hydrated samples were characterized by X‐ray power diffraction (XRD), Scanning electron microscopy (SEM) and nitrogen sorption analyses. The results indicated that the hydration degree was 20%∼30% higher in hydration agent solution than that in deionized water. Hexagonal plate crystal was obtained in all reaction systems, while lager diameter and thinner crystallite was formed in the acetate system. The degree of hydration and the SEM analysis results indicated that the peel‐off phenomenon was more obvious in the present of CH 3 COO − .
    Type of Medium: Online Resource
    ISSN: 0232-1300 , 1521-4079
    URL: Issue
    URL: Article
    DOI: 10.1002/crat.v52.6
    DOI: 10.1002/crat.201600393
    RVK:
    UA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 1480828-6
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  • 4
    Online Resource
    Online Resource
    Shipboard trials of magnesium-based exhaust gas cleaning system
    Elsevier BV ; 2016
    In:  Ocean Engineering Vol. 128 ( 2016-12), p. 124-131
    Details
    In: Ocean Engineering, Elsevier BV, Vol. 128 ( 2016-12), p. 124-131
    Type of Medium: Online Resource
    ISSN: 0029-8018
    URL: Article
    DOI: 10.1016/j.oceaneng.2016.10.004
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2016
    detail.hit.zdb_id: 1498543-3
    detail.hit.zdb_id: 160791-1
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  • 5
    Online Resource
    Online Resource
    Ultrastretchable Fiber Sensor with High Sensitivity in Whole Workable Range for Wearable Electronics and Implantable Medicine
    Wiley ; 2018
    In:  Advanced Science Vol. 5, No. 9 ( 2018-09)
    Details
    In: Advanced Science, Wiley, Vol. 5, No. 9 ( 2018-09)
    Abstract: Fast progress in material science has led to the development of flexible and stretchable wearable sensing electronics. However, mechanical mismatches between the devices and soft human tissue usually impact the sensing performance. An effective way to solve this problem is to develop mechanically superelastic and compatible sensors that have high sensitivity in whole workable strain range. Here, a buckled sheath–core fiber‐based ultrastretchable sensor with enormous stain gauge enhancement is reported. Owing to its unique sheath and buckled microstructure on a multilayered carbon nanotube/thermal plastic elastomer composite, the fiber strain sensor has a large workable strain range ( 〉 1135%), fast response time (≈16 ms), high sensitivity (GF of 21.3 at 0–150%, and 34.22 at 200–1135%), and repeatability and stability (20 000 cycles load/unload test). These features endow the sensor with a strong ability to monitor both subtle and large muscle motions of the human body. Moreover, attaching the sensor to a rat tendon as an implantable device allowes quantitative evaluation of tendon injury rehabilitation.
    Type of Medium: Online Resource
    ISSN: 2198-3844 , 2198-3844
    URL: Issue
    URL: Article
    DOI: 10.1002/advs.v5.9
    DOI: 10.1002/advs.201800558
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2808093-2
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  • 6
    Online Resource
    Online Resource
    Pilot-Scale Study on Treating Wastewater from Magnesium-Based Exhaust Gas Cleaning System by a Novel Process
    Springer Science and Business Media LLC ; 2017
    In:  Water, Air, & Soil Pollution Vol. 228, No. 2 ( 2017-2)
    Details
    In: Water, Air, & Soil Pollution, Springer Science and Business Media LLC, Vol. 228, No. 2 ( 2017-2)
    Type of Medium: Online Resource
    ISSN: 0049-6979 , 1573-2932
    URL: Article
    DOI: 10.1007/s11270-017-3246-3
    RVK:
    ZC 7520
    RVK:
    AR 10100
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2017
    detail.hit.zdb_id: 1479824-4
    detail.hit.zdb_id: 120499-3
    SSG: 12
    SSG: 13
    SSG: 21
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  • 7
    Online Resource
    Online Resource
    Material qualification of a 13Cr-L80 casing for sour conditions
    Walter de Gruyter GmbH ; 2019
    In:  Materials Testing Vol. 61, No. 9 ( 2019-08-30), p. 833-841
    Details
    In: Materials Testing, Walter de Gruyter GmbH, Vol. 61, No. 9 ( 2019-08-30), p. 833-841
    Abstract: This work aims to determine the material qualification of 13Cr-L80 casing for sour conditions which is of great importance to check the sulfide stress cracking susceptibility, confirm the range of applicable conditions and recommend anti-corrosion materials. First, the casing material was tested to judge whether its properties were normal. Secondly, the testing matrix was defined to determine actual casing exposure conditions. Thirdly, slow strain rate testing was used to screen the conditions. Fourthly, thirty-day tests of uniaxial tensile specimens were conducted to check for SSC susceptibility. The casing material satisfied API 5CT standards and could be used for slow strain rate testing and sulfide stress cracking testing. The testing matrix is intended to distinguish the combined effect of temperatures (41, 75, 140 °F), chloride levels (1000, 13 000 mg × L −1 ), pH (3.5, 5.5) and partial pressures of H 2 S (3.5 psi) in shut-in and flowing conditions. The slow strain rate testing showed a reduction of signs of embrittlement with increased temperature, suggesting that the mechanism is supported by sulfide stress cracking. The 13Cr-L80 passed field-specific qualification tests for sulfide stress cracking resistance in sour wells at maximum H 2 S partial pressures of 3.5 psi in the casing-tubing annulus. The API 5CT 13Cr-L80 casing application is in compliance with ISO15156/NACE MR0175 standards as long as the aggressiveness of the field conditions does not go beyond the envelope conditions tested (3.5 psi of H 2 S, pH 3.5, temperature of 41 or 75 °F).
    Type of Medium: Online Resource
    ISSN: 2195-8572 , 0025-5300
    URL: Article
    DOI: 10.3139/120.111362
    RVK:
    ZG 1100
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2280363-4
    detail.hit.zdb_id: 206395-5
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  • 8
    Online Resource
    Online Resource
    Correlation Between Apolipoprotein M and Inflammatory Factors in Obese Patients
    International Scientific Information, Inc. ; 2018
    In:  Medical Science Monitor Vol. 24 ( 2018-08-15), p. 5698-5703
    Details
    In: Medical Science Monitor, International Scientific Information, Inc., Vol. 24 ( 2018-08-15), p. 5698-5703
    Type of Medium: Online Resource
    ISSN: 1643-3750
    URL: Article
    DOI: 10.12659/MSM.907744
    Language: English
    Publisher: International Scientific Information, Inc.
    Publication Date: 2018
    detail.hit.zdb_id: 2060401-4
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