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  • Open Access

    ARTICLE

    Steam Methane Reforming (SMR) Combined with Ship Based Carbon Capture (SBCC) for an Efficient Blue Hydrogen Production on Board Liquefied Natural Gas (LNG) Carriers

    Ikram Belmehdi1,*, Boumedienne Beladjine1, Mohamed Djermouni1, Amina Sabeur1, Mohammed El Ganaoui2

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.1, pp. 71-85, 2025, DOI:10.32604/fdmp.2024.058510 - 24 January 2025

    Abstract The objective of this study is to propose an optimal plant design for blue hydrogen production aboard a liquefied natural gas (LNG) carrier. This investigation focuses on integrating two distinct processes—steam methane reforming (SMR) and ship-based carbon capture (SBCC). The first refers to the common practice used to obtain hydrogen from methane (often derived from natural gas), where steam reacts with methane to produce hydrogen and carbon dioxide (CO2). The second refers to capturing the CO2 generated during the SMR process on board ships. By capturing and storing the carbon emissions, the process significantly reduces its… More >

  • Open Access

    ARTICLE

    Growth, Yield, Energetics, CO2 Emissions and Production Economics of Zero-Tillage Wheat as Influenced by Different Rice Residue Loads and Nutrient Management Options

    Mallepu S Likhitha Reddy1, Biplab Mitra1, Ahmed Gaber2, Akbar Hossain3,*

    Phyton-International Journal of Experimental Botany, Vol.93, No.12, pp. 3509-3530, 2024, DOI:10.32604/phyton.2024.056789 - 31 December 2024

    Abstract The rice‒wheat farming system is considered as the greatest energy-intensive agricultural practice in South‒East Asia. In light of declining system production and profitability, burning of residues, soil erosion, depletion of renewable resources, and environmental degradation, the sustainability of the rice‒wheat cropping system is being questioned. As a result, energy and money efficient conservation agricultural methods are becoming more and more necessary to accomplish sustainable output. A field experiment was carried out in this regard to evaluate the effects of varying degrees of rice residue retention and nutrient management options on zero-tillage grown wheat growth, yield,… More >

  • Open Access

    ARTICLE

    Analysis of Fluid-Structure Interaction during Fracturing with Supercritical CO2

    Jiarui Cheng1,*, Yirong Yang1, Sai Ye2, Yucheng Luo1, Bilian Peng1

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.12, pp. 2887-2906, 2024, DOI:10.32604/fdmp.2024.057056 - 23 December 2024

    Abstract During the implementation of CO2 fracturing for oil and gas development, the force transfer effect caused by the unsteady flow of high-pressure CO2 fluid can lead to forced vibration of the tubing and ensuing structural fatigue. In this study, a forced vibration analysis of tubing under CO2 fracturing conditions is carried out by taking into account the fluid-structure coupling and related interaction forces by means of the method of characteristics (MOC). The results show that for every 1 m3/min increase in pumping displacement, the fluid flow rate increases up to 3.67 m/s. The flow pressure in the… More > Graphic Abstract

    Analysis of Fluid-Structure Interaction during Fracturing with Supercritical CO<sub>2</sub>

  • Open Access

    ARTICLE

    Far-Field Behavior of Supercritical CO2 Being Dispersed Due to Leakage from Pipelines

    Yanbo Shao1, Xuewen Cao1,*, Wei You1, Shan Zhao1, Zilong Nan2, Jiang Bian1,3,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.12, pp. 2867-2885, 2024, DOI:10.32604/fdmp.2024.053774 - 23 December 2024

    Abstract Transporting massive quantities of carbon dioxide through a pipeline in its supercritical state is extremely convenient. Because of the unique properties of supercritical carbon dioxide, however, leakage occurring in such conditions can be extremely intricate, resulting in the dispersion area following leakage being influenced by numerous factors. In this study, this problem is addressed in the frame of the so-called Unified Dispersion Model (UDM), and various influential parameters are considered, namely, leakage pressure, leakage temperature, leakage aperture, leakage angle, atmospheric stability, wind speed, and surface roughness. The results show that the supercritical carbon dioxide dispersion More >

  • Open Access

    ARTICLE

    Flow and Heat Transfer Features of Supercritical Pressure CO2 in Horizontal Flows under Whole-Wall Heating Conditions

    Jiangfeng Guo1,2,3,*, Hongjie Yu1

    Frontiers in Heat and Mass Transfer, Vol.22, No.6, pp. 1575-1595, 2024, DOI:10.32604/fhmt.2024.058179 - 19 December 2024

    Abstract Based on the first and second laws of thermodynamics, the heat transfer and flow (thermohydraulic) characteristics of horizontal supercritical pressure CO2 (S-CO2) in a circular pipe under heating conditions were investigated numerically. Heating flows in two different diameters (d) of 4 and 6 mm were simulated in pipes with pressures of 8 MPa, mass fluxes (G) of 300 and 400 kg/(m2·s), and heat fluxes (q) of 50, 75 and 100 kW/m2. In the d = 4 mm pipe, the peak heat transfer coefficient (hb) was about 3 times higher than in the d = 6 mm pipe, while the entropy… More > Graphic Abstract

    Flow and Heat Transfer Features of Supercritical Pressure CO<sub>2</sub> in Horizontal Flows under Whole-Wall Heating Conditions

  • Open Access

    ARTICLE

    Analysis of Air Exchange System Influence on Thermal and Concentration Modes in the Local Working Area under Radiant Heating Conditions

    Boris Borisov, Geniy Kuznetsov, Vyacheslav Maksimov*, Tatiana Nagornova, Felix Salikhov

    Frontiers in Heat and Mass Transfer, Vol.22, No.6, pp. 1597-1612, 2024, DOI:10.32604/fhmt.2024.056758 - 19 December 2024

    Abstract One of the effective options for energy saving in terms of heat costs for the formation of routine thermal conditions of working areas of large-sized industrial premises is the replacement of traditional convective (water) heating systems with systems, the main part of which are gas infrared emitters. But the mass introduction of such systems based on emitters was held back until recently by the lack of scientific and technical foundations for ensuring not only the routine thermal conditions of local working areas, but also ensuring acceptable concentrations of carbon dioxide, which is formed during the… More > Graphic Abstract

    Analysis of Air Exchange System Influence on Thermal and Concentration Modes in the Local Working Area under Radiant Heating Conditions

  • Open Access

    PROCEEDINGS

    Green Ammonia-Mediated CO2 Capture and Conversion to Valuable Chemicals

    Wenzhen Li1,*, Hengzhou Liu1, Yifu Chen1, Shuang Gu2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.31, No.1, pp. 1-1, 2024, DOI:10.32604/icces.2024.012577

    Abstract Direct electrochemical conversion of CO2 capture solutions (instead of gaseous CO2) into valuable chemicals can circumvent the energy-intensive CO2 regeneration and pressurization steps. While commonly used CO2 capture agents include alkali and amine solutions, ammonia has been rarely investigated. In another aspect, mismanagement of reactive nitrogen (Nr) in waste has emerged as a major problem in water pollution to our ecosystems, causing severe eutrophication and health concerns. Sustainably recovering Nr [such as nitrate (NO3)-N] and converting it into green ammonia (NH3) could mitigate the environmental impacts of Nr and reduce the NH3 demand from the carbon-intensive Haber-Bosch process, as… More >

  • Open Access

    PROCEEDINGS

    Fast and Accurate Calculation on Competitive Adsorption Behavior in Shale Nanopores by Machine Learning Model

    Hao Yu1,*, Mengcheng Huang1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.30, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.011120

    Abstract Understanding the competitive adsorption behavior of CO2 and CH4 in shale nanopores is crucial for enhancing the recovery of shale gas and sequestration of CO2, which is determined by both the inherent characteristics of the molecules and external environmental factors such as pore size, temperature, and partial pressures of CO2 and CH4. While the competitive adsorption behavior of CO2/CH4 has been analyzed by previous studies, a comprehensive understanding from the perspective of molecular kinetic theory and the efficient calculation for competitive adsorption behavior considering various geological situations is still challenging, limited by the huge computation cost of classical… More >

  • Open Access

    ARTICLE

    Impact of the Inlet Flow Angle and Outlet Placement on the Indoor Air Quality

    Ikram Mostefa Tounsi1,*, Mustapha Boussoufi1, Amina Sabeur1, Mohammed El Ganaoui2

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.11, pp. 2603-2616, 2024, DOI:10.32604/fdmp.2024.050641 - 28 October 2024

    Abstract This study aims to optimize the influence of the inlet inclination angle on the Indoor Air Quality (IAQ), heat, and temperature distribution in mixed convection within a two-dimensional square cavity filled with an air-CO2 mixture. The air-CO2 mixture enters the cavity through two inlet openings positioned at the top wall, which is set at the ambient temperature (TC). Three values of the Reynolds numbers, ranging from 1000 to 2000, are considered, while the Prandtl number is kept constant (Pr = 0.71). The temperature distribution and streamlines are shown for Rayleigh number (Ra) equal to 104, three inlet More >

  • Open Access

    PROCEEDINGS

    Numerical Simulation of Proppant Migration in the Non-Uniform Temperature Field during Supercritical CO2 Fracturing

    Boyu Liu1, Jun Yao1,*, Hai Sun1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.1, pp. 1-1, 2024, DOI:10.32604/icces.2024.011600

    Abstract The temperature gradient between the geological formation and the injected supercritical CO2 (Sc-CO2) initiates heat transfer processes, leading to a non-uniform temperature field within the fracture. This spatial thermal variation induces fluctuations in the density and viscosity of Sc-CO2. Moreover, the non-uniform density distribution of Sc-CO2 leads to varying degrees of volume expansion or shrinkage, influencing fluid flow velocities within the fractures. This study integrates heat transfer and fluid leak-off models into the Eulerian-Eulerian two-fluid framework to systematically investigate the collective impacts of Sc-CO2's density, viscosity, and density-induced volumetric alterations on the proppant transport process under varied pumping… More >

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