Current Issue : July - September Volume : 2019 Issue Number : 3 Articles : 5 Articles
This paper was focused on the method to increase of the sorption properties in the flax fibrous material. This method was based on\nthe original approach which includes the application of enzymatic catalysis as a destruction regulator of the polycarbohydrate\ncomponents in the bast. Theformed reaction products were used as reagents for reductive destruction of lignin.The changes in the\nfiber sorption capacity to the molecular markers were controlled after changing both the polymer composition of the fiber and the\nsize of its pore. It was determined that the flax sorbents increase the adsorption of phenol vapors to 9â??12 times and organic dyes\nfrom aqueous solutions to 4 times....
The increasing demand for cleaner fuels and the recent stringent regulations of commercial fuel specifications have driven the\nresearch of alternative methods to upgrade the current industrial desulfurization technology. Adsorptive desulfurization, the\nremoval of refractory sulfur compounds using appropriate selective tailor-made adsorbents, has shown up as a promising alternative\nin the recent years. Carbon nanomaterials, namely, graphene, graphene oxide, carbon nanotubes and carbon nanofibers,\nshow a significant potential as desulfurization adsorbents. Their surface area and porosity, their ability of easy functionalization,\nand their suitability to serve as a support of different types of adsorbents have rendered them attractive candidates for this purpose.\nIn this review, after a presentation of the current industrial desulfurization practice and its limitations, the structure and properties\nof the carbon nanomaterials of interest will be described, followed by a detailed account of their applications in adsorptive\ndesulfurization. The major literature findings and conclusions will be presented and discussed as a road map for future research in\nthe field....
In recent years, modularization of chemical production plants has become a widely\ndiscussed trend to overcome some of key issues the chemical industry struggles with. High volatility\nin raw material and customer markets, shorter product life cycles, cost pressure and increasing\ncompetition are just a few of them. Modularization of chemical production offers the opportunity\nto deal with these issues. The unit operations, which are capable to be applied in modular plant\nconcepts, are subject of on-going research. On the reaction side, tubular continuous flow reactors\nare typical assets and methods for design and operation are available on a high technical level.\nSeparation units on the downstream side are not yet developed to technical maturity. This paper\nfocuses on extraction centrifuges, which are promising devices due to their large range of application,\nsmall volumes, high separation efficiency and excellent scalability. Industrial examples show the\nperformance of extraction centrifuges in multi-purpose large-scale production facilities and prove\nthat these units are predestined for application in modular plants....
Polydopamine (PDA) films are interesting as smart functional materials, and their\ncontrolled structured formation plays a significant role in a wide range of applications ranging from\ncell adhesion to sensing and catalysis. A pulsed deposition technique is reported for microstructuring\npolydopamine films using scanning electrochemical microscopy (SECM) in direct mode.\nThereby, precise and reproducible film thicknesses of the deposited spots could be achieved ranging\nfrom.............
Superhydrophobic nanomaterials are promising in the important pursuit to alleviate the\nenvironmental pollution caused by the petroleum crude oil industry, especially to clean-up oil spills.\nIn this work, asphaltenes isolated from crude oil were modified to act as capping agents during the\nsynthesis of hydrophobic silica nanoparticles (HSNPs). The chemical structure, surface morphology,\nparticle size, and surfaces charge of HSNPs were investigated. The contact angles of water droplets on\nHSNP film surfaces were measured to investigate their wetting properties. Finally, superhydrophobic\nsand and polyurethane sponge were prepared by coating them with HSNPs and applied in the\ncleanup of oil spills of viscous heavy Arabian crude oil....
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