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10 articles for “fixed beds”
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The Influence of Sediment Deposits in the Threshold Criteria of Sediment Movement in Rigid Boundary
Abstract: An effort is made to develop a simplified methods for the estimation of bed shear stress for rigid boundary for initiation of sediment motion using different bed thickness, bed slopes and different sediment particles diameters (ranging between (0.5mm < d50 < 4.78). The findings were compared with the earlier studies demonstrating that critical shear parameter value for fixed beds is less than the reported values in literature. This come in …
Published in Recent Trends in Civil Engineering & Technology · Vol. 11, Issue 3, 2021 · pp. 31–39 Read article
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Continuous Column Study of Chromium (VI) Adsorption by Ion Exchange Resin
Abstract: The Indion GS300 anion exchange resin was trialed for its ability to remove chromium (VI) from synthetic wastewater by continuous column experiments. The ability of Indion GS300 to adsorb chromium (VI) in a fixed-bed column was analyzed. The effects of operating parameters such as flow rate and bed depth on the sorption characteristics of Indion GS300 were investigated. The total adsorbed quantities, equilibrium characteristics were related to the effluent volumes …
Published in Emerging Trends in Chemical Engineering · Vol. 1, Issue 2, 2014 · pp. 1–7 Read article
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Nanoyeast Supported on Silica Gel for The Continuous Flow Bioethanol Production
Abstract: Nanomaterials outperform their bulk counterparts. Yet, production of nanomaterials, especially, nanoyeast is a challenge and is an upcoming field. Yeast is a fungal strain that consumes carbohydrates (glucose, sucrose, molasses and the like) and produces bioethanol, a potential transportation fuel. Impregnation methods are well known in catalysis to yield nanomaterials via better dispersion. An attempt has been made to modulate the size of yeast to increase the efficiency of carbohydrate …
Published in International Journal of Advance in Molecular Engineering · Vol. 2, Issue 1, 2024 · pp. 1–7 Read article
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Clay–Polymer Nanocomposites: An Efficient Adsorbent for Waste Water Treatment
Abstract: Despite the abundance of water sources, the globe today lacks potable water because to pollution. Pollutants can be removed from water using a variety of technologies, but adsorption is considered the most simple, effective, economical, and ecologically beneficial method. The class of adsorbents known as clay–polymer nanocomposite (CPN) adsorbents is one that is now gaining popularity. By adsorbing and flocculating inorganic and organic micropollutants from water, CPNs efficiently cleanse water. …
Published in Journal of Polymer & Composites · Vol. 12, Issue 5, 2024 · pp. 111–118 Read article
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Synthesis of Biofuel from Castor Oil Using Novel Catalysts
Abstract: An essential step in improving biofuels, especially those made from biomass, is hydrodeoxygenation (HDO). HDO's primary goal is to eliminate oxygen atoms from the biofuel feedstock in the form of water, which enhances the fuel's energy density, stability, and compatibility with current fuel.This study uses a large surface area catalyst to investigate the hydrodeoxygenation (HDOx) activity of non-edible oils. In addition to other supports including H-USY and MCM-41, large surface …
Published in Journal of Polymer & Composites · Vol. 12, Issue 4, 2024 · pp. 226–237 Read article
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Synthesis and Evaluation of MgO-Supported Activated Carbon for Carbon dioxide Capture
Abstract: Carbon dioxide (CO₂) capture has emerged as a critical strategy for mitigating greenhouse gas emissions and addressing global climate change. In this study, a series of MgO-supported activated carbon adsorbents containing 2, 4, 6, 8, and 10 wt% MgO were successfully synthesized using the impregnation method to evaluate their CO₂ adsorption performance. The structural, chemical, and surface properties of the prepared materials were characterized using powder X-ray diffraction (PXRD), Fourier-transform …
Published in Journal of Catalyst & Catalysis · Vol. 13, Issue 3, 2026 · pp. 53–57 Read article
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Optimization of Process Parameters for Isopropylation of Toluene over Modified Zeolite using Response Surface Methodology
Abstract: Vapor-phase isopropylation of toluene with isopropanol has been investigated in a fixed-bed flow reactor under atmospheric pressure using N2 carrier gas over Cerium modified 13X zeolite catalyst. The main product of this alkylation reaction was p-cymene followed by meta-isomer, while ortho-cymene was negligibly formed. Response surface methodology was used to study the combined effects of temperature, reactant molar ratio and space time on the conversion of toluene and selectivity of …
Published in Emerging Trends in Chemical Engineering · Vol. 1, Issue 1, 2014 · pp. 22–30 Read article
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Role of Solid Acid Catalyst in Isopropylation Reaction
Abstract: Cumene synthesis was carried out by the reaction of benzene with isopropyl alcohol in the vapour phase over rare earth metal modified 13X zeolite. Zeolite modification was done by exchanging sodium ions of the zeolite with cerium ions to vary the acidity of the catalyst in the range of 0.25‑1.36 meq/g. The synthesis was carried out over a wide range of operating conditions. The synthesis conditions were optimized by studying …
Published in Journal of Catalyst & Catalysis · Vol. 2, Issue 2, 2015 · pp. 19–26 Read article
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Generating Fuel Energy by Catalytic Pyrolyzing of Microalgae
Abstract: In biomass pyrolysis process, a catalyst is used to modify the pyrolysis gases' chemical composition and increase the bio-oil fraction. This process uses the byproducts of thermal conversion processes. It is anticipated that the introduction of pyrolysis catalysts in the case of microalgae will lower the bio-oxygen oil's content and increase the number of added-value compounds in this liquid fraction. Catalysts can also help decrease the nitrogen in bio-oil. As …
Published in Journal of Catalyst & Catalysis · Vol. 9, Issue 2, 2022 · pp. 31–35 Read article
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Stability Analysis of Pontoons under Breakwater and Mooring System
Abstract: Floating pontoons are the new advance method and technology in construction industry. Land issue is very common issue in various countries. Constructing on waters and in the waters is the only option to overcome the land issue. Also, the construction of the bridges and other water-based structures also can be constructed by using pontoons. Pontoons are being used in the construction since ancient time Including temporary bridges and small shelters. …
Published in Journal of Water Resource Engineering and Management Read article