Home / Advanced Search

  • Title/Keywords

  • Author/Affliations

  • Journal

  • Article Type

  • Start Year

  • End Year

Update SearchingClear
  • Articles
  • Online
Search Results (46)
  • Open Access

    ARTICLE

    CO2-Responsive Smart Foams Stabilized by an Extremely Rigid Bio-Based Surfactant

    Weishan Tang, Xin Feng, Caiyun Lin, Xiaoping Rao*

    Journal of Renewable Materials, Vol.11, No.2, pp. 523-538, 2023, DOI:10.32604/jrm.2022.022809

    Abstract Environment friendly and intelligent surfactants have attracted great attention in recent years. A bio-based CO2 responsive surfactant rosin acid dimaleimide choline (R-BMI-C) with an extremely rigid skeleton was prepared using rosin and choline as raw materials by Diels-Alder addition reaction and acid-base neutralization reactions. Its structure was confirmed by IR and 1H NMR spectra. The foams’ properties of R-BMI-C could be adjusted by bubbling CO2/N2 to change the structure of the surfactant. At pH 10.4, R-BMI-C forms an unstable foam with a half-life of 1.5 h. When the pH was reduced to 7.4 by bubbling CO2, R-BMI-C forms an extremely… More > Graphic Abstract

    CO<sub>2</sub>-Responsive Smart Foams Stabilized by an Extremely Rigid Bio-Based Surfactant

  • Open Access

    ARTICLE

    Kinetics of the Demineralization Reaction of Deproteinized Lobster Shells Using CO2

    Miguel Ángel Ramírez1, Luis Alfonso, Patricia González2, Juan Reinerio Fagundo2, Margaret Suarez3, Clara Melian3, Tania Rodríguez1, Carlos Peniche4,*

    Journal of Renewable Materials, Vol.3, No.1, pp. 73-80, 2015, DOI:10.7569/JRM.2014.634116

    Abstract The demineralization kinetics of deproteinized lobster shells using CO2 were studied. Demineralization reaction proceeds until the concentration of Ca+2 in solution reaches an equilibrium value. The introduction of a cation exchange resin (cationite), in an open system for CO2 , allows replacement of the solution Ca2+ ions by Na+ ions, whereby the equilibrium shifts and an effective dissolution of the exoskeletons’ calcite is achieved. The mathematical relationships between the conductivity of the solution and the concentrations of major ions, the rate constants and kinetic parameters of the reaction in the absence and presence of the resin were obtained. It was… More >

  • Open Access

    ARTICLE

    Bulk CO2-based Amorphous Triols Used for Designing Biocompatible Shape-Memory Polyurethanes

    Shunjie Liu1,2, Yusheng Qin1,*, Xianhong Wang1,*, Fosong Wang1

    Journal of Renewable Materials, Vol.3, No.2, pp. 101-112, 2015, DOI:10.7569/JRM.2014.634140

    Abstract Precursors with sharp crystalline transition temperature have attracted signifi cant attention in the fi eld of shape-memory materials; however, seldom have reports been related to amorphous ones with industrial application prospects. This study introduced a new family of amorphous CO2 -based hydroxyl-telechelic three-armed oligo(carbonate-ether) triol (Triol) with controllable molecular weight (Mn) and carbonate unit content (CU), which was coupled with PEG and 1,6-hexamethylene diisocyanate (HDI) to afford crosslinked polyurethanes (PU) networks with well-defi ned architecture. A crosslinking point was provided by Triol and PEG was used to afford networks some crystallinity. The resulting networks were characterized using attentuated total refl… More >

  • Open Access

    ARTICLE

    Using CO2 -Based Polymer Polypropylene Carbonate to Enhance the Interactions in Poly(lactic acid)/Wood Fiber Biocomposites

    Xiaoqing Zhang*, Simon Schmidtφ, Nick Rigopoulos, Januar Gotama, Eustathios Petinakis

    Journal of Renewable Materials, Vol.3, No.2, pp. 91-100, 2015, DOI:10.7569/JRM.2014.634135

    Abstract The behavior of a biodegradable CO2 -based polymer polypropylene carbonate (PPC) as polymer matrix of wood fi ber (WF) composites was examined and compared with that of using poly(lactic acid) (PLA) as the matrix. The PPC/WF composites displayed poor mechanical properties as compared to PLA/WF composites because PPC is an amorphous polymer with low Tg and poor thermal stability. However, when PPC was used in conjunction with PLA in WF composites, the mechanical strength and modulus of the composites could match or even exceed the level of PLA/WF composites. The strong intermolecular interactions between PPC and WF and those between… More >

  • Open Access

    ARTICLE

    Effects of Fertilization on Soil CO2 Efflux in Chinese Hickory (Carya cathayensis) Stand

    Juan Liu1,2,*, Meiqun Zheng1, Xueshuang Chen1

    Phyton-International Journal of Experimental Botany, Vol.92, No.1, pp. 271-283, 2023, DOI:10.32604/phyton.2022.023397

    Abstract Chinese hickory (Carya cathayensis Sarg.) is a popular nut tree in China, but there is little information about the influences of fertilization on soil CO2 efflux and soil microbial biomass. This study evaluated the short-term effects of different fertilizer applications on soil CO2 efflux and soil microbial biomass in Chinese hickory stands. Four fertilizer treatments were established: control (CK, no fertilizer), inorganic fertilizer (IF), organic fertilizer (OF), and equal parts organic and inorganic N fertilizers (OIF). A field experiment was conducted to measure soil CO2 effluxes using closed chamber and gas chromatography techniques. Regardless of the fertilization practices, soil CO2More >

  • Open Access

    ARTICLE

    Study on Biological Pathway of Carbon Dioxide Methanation Based on Microbial Electrolysis Cell

    Guanwen Ding, Qifen Li*, Liting Zhang, Yuanbo Hou, Xiaoxiao Yan

    Journal of Renewable Materials, Vol.11, No.1, pp. 197-207, 2023, DOI:10.32604/jrm.2023.020277

    Abstract Realization of CO2 resource utilization is the main development direction of CO2 reduction. The CO2 methanation technology based on microbial electrolysis cell (MEC) has the characteristics of ambient temperature and pressure, green and low-carbon, which meets the need of low-carbon energy transition. However, the lack of the system such as the change of applied voltage and the reactor amplification will affect the methane production efficiency. In this research, the efficiency of methane production with different applied voltages and different types of reactors was carried out. The results were concluded that the maximum methane production rate of the H-type two-chamber microbial… More >

  • Open Access

    ARTICLE

    Turbulent Double-Diffusive Natural Convection and Entropy Generation within an Inclined Square Cavity

    Khaled Said*, Ahmed Ouadha, Amina Sabeur

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.6, pp. 1619-1629, 2022, DOI:10.32604/fdmp.2022.022220

    Abstract The present study deals with double-diffusive convection within a two-dimensional inclined cavity filled with an air-CO2 binary gas mixture. The left and the right vertical walls are differentially heated and subjected to different locations of (CO2) contaminants to allow for the variation of the buoyancy strength (N). However, the horizontal walls are assumed adiabatic. The simulations are conducted using the finite volume method to solve the conservation equations of continuity, momentum, energy, and species transport. Good agreement with other numerical results in the literature is obtained. The effect of multiple parameters, namely, buoyancy ratio (N), thermal Rayleigh number (Ra), and… More >

  • Open Access

    ARTICLE

    CO2 and Cost-Based Optimum Design of Sustainable Metakaolin-Modified Concrete

    Xiaoyong Wang*

    Journal of Renewable Materials, Vol.10, No.9, pp. 2431-2450, 2022, DOI:10.32604/jrm.2022.020829

    Abstract Metakaolin is a highly reactive pozzolanic material that is widely utilized for enhancing the performance of concrete. This study offers a framework for the mixture design of sustainable metakaolin-modified concrete with low CO2 emissions and low costs. Different design strengths after 28 days are first formulated, with values such as 30, 40, 50, and 60 MPa. A genetic algorithm is then used to determine the optimal mixtures. Minimized CO2 and cost are set as the aims of the genetic algorithm. The strength of the concrete, its workability (slump), and carbonation service life with climate change are set as constraints of the… More >

  • Open Access

    ARTICLE

    Study of CO2 Flooding to Improve Development Effect in Conglomerate Reservoirs

    Haihai Dong1, Yaguang Qu2,3,*, Ming Liu4, Lei Zhang1, Jiakun Wu5

    Energy Engineering, Vol.119, No.4, pp. 1681-1695, 2022, DOI:10.32604/ee.2022.019843

    Abstract For low permeability sandstone reservoirs, CO2 flooding has been proved to be an effective method to enhance oil recovery. Reservoir A is a typical conglomerate reservoir in Xinjiang oilfield. The reservoir has strong water sensitivity, and the injection pressure continues to rise. Furthermore the oil well pressure continues to drop. According to the screening conditions of CO2 flooding, the reservoir A can easily achieve CO2 miscible flooding with moderate temperature. And the reservoir has the advantage of being close to the gas source. Firstly, the relationship curve between CO2 oil displacement efficiency and oil displacement pressure was obtained by changing… More >

  • Open Access

    ARTICLE

    Modeling CO2 Emission of Middle Eastern Countries Using Intelligent Methods

    Mamdouh El Haj Assad1, Ibrahim Mahariq2,*, Zaher Al Barakeh2, Mahmoud Khasawneh2, Mohammad Ali Amooie3

    CMC-Computers, Materials & Continua, Vol.69, No.3, pp. 3767-3781, 2021, DOI:10.32604/cmc.2021.018872

    Abstract CO2 emission is considerably dependent on energy consumption and on share of energy sources as well as on the extent of economic activities. Consequently, these factors must be considered for CO2 emission prediction for seven middle eastern countries including Iran, Kuwait, United Arab Emirates, Turkey, Saudi Arabia, Iraq and Qatar. In order to propose a predictive model, a Multilayer Perceptron Artificial Neural Network (MLP ANN) is applied. Three transfer functions including logsig, tansig and radial basis functions are utilized in the hidden layer of the network. Moreover, various numbers of neurons are applied in the structure of the models. It… More >

Displaying 21-30 on page 3 of 46. Per Page