Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Chemical Recovery"”.
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Numerical modeling of chemical recovery from black liquor char
… complete CFD model for the char burning stage of chemical recovery from black liquor is presented. Chemical recovery from black liquor is characterized by the occurrence of multiple, simultaneous reactions occurring in dynamic flow conditions. Rate equations for the different chemical reactions …
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Acidification and Climate Warming: Understanding the Impact of Multiple Anthropogenic Stressors on Adirondack (NY, USA) Lakes
… in the Adirondack Park (NY, USA) are undergoing chemical recovery from acidification. There is now a pressing research need to define recovery targets for acid-impacted sites. Researchers attempting to designate such targets are hampered by two issues: 1) a lack of long-term monitoring data, and …
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Bringing photodegradation of plastic waste into the “green age” through off-grid sustainable energy
… despite the current efforts in physical and chemical recycling. Moreover, the faster turnover rate on electronic devices by all consumers continues to increase the generation of plastic waste; consequently, the pollution generated also increases worldwide. Despite breakthroughs that have been …
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Modeling of the hydrodynamics within the header of a tubular membrane module.
… treat fiber suspensions for effluent control and chemical recovery in the pulp and paper industry. However, the treatment of pulp suspensions with modules containing tubes having an inside diameter of less than 2.54 cm is typically problematic. Severe blockage occurs at the inlet of the tubes due …
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Design and implementation of graphical user interfaces for complex simulations
… Simulation routines have been developed for the chemical recovery cycle of a paper pulp mill. The application, by creation of new classes, of the prototype to the interactive simulation of this physical system is described. Besides providing visual feedback, the resulting graphical user interface …
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Ion exchange for the desalination and treatment of wastewater
… cost studies also indicated that regenerant chemicals constituted the major cost item in an IX plant. On the basis, therefore, of the IX literature review and the cost exercise, the decision was made. to use CCIX and to develop a specific process for the treatment of secondary sewage …
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Development of a Mathematical Model for Monitoring Recovery Boiler Dissolving Tank Sounds
In the chemical recovery process of kraft pulp mills, molten smelt falls into the dissolving tank where it interacts violently with hot water. These smelt-water interactions allow for fast smelt dissolution, however too many violent interactions can also cause equipment damage. In severe cases, …
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Kraft lignin as a fuel for the rotary lime kiln
For many kraft pulp mills the chemical recovery boiler, in which concentrated black liquor is burned, represents the principal obstacle to increased production. However, studies have shown that the removal of even a small portion of the lignin from the black liquor would permit an incremental …
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Biomass pretreatment toward efficient hydrolysis for sustainable biofuel applications
… processes such as heat, physical and chemical treatments to disturb and fractionate the biomass. Significant research effort has been devoted to understanding the recalcitrant nature and to accelerate the commercialization process of second generation biofuels. In this thesis, three …
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Management to facilitate compliance with global conventions during hazardous and toxic waste cleanup projects in Asia
… in Asia (especially that related to intractable chemicals) has had a less than acceptable performance profile during the last 20 years. There have been numerous documented cases of management and systems failures in intractable chemical recovery projects, despite the establishment of global …