Search results for " Supercritical water"

showing 3 items of 3 documents

Combined gasification-oxidation system for waste treatment with supercritical water: Lca and performance analysis

2020

In this study the environmental performance of a first-of-its-kind integrated process based on supercritical water gasification and oxidation (SCW-GcO), was evaluated using life cycle assessment (LCA). The process was applied to the treatment of carbon black and used oil as model wastes. Mass and energy balances were performed using Aspen Plus, and the environmental assessment was carried out through SimaPro. A “from cradle to grave” approach was chosen for the analysis, considering impact categories such as climate change, ozone depletion, human toxicity, particulate matter, land use, resource depletion, and other relevant indicators. The environmental profile of the SCW-GcO process was co…

020209 energySettore ING-IND/25 - Impianti ChimiciGeography Planning and DevelopmentEnergy balanceTJ807-83002 engineering and technologyManagement Monitoring Policy and Lawsupercritical waterTD194-195Renewable energy sourceslife cycle assessment0202 electrical engineering electronic engineering information engineeringEnvironmental impact assessmentGE1-350Life-cycle assessmentwaste treatmentsSettore ING-IND/11 - Fisica Tecnica AmbientaleWaste managementEnvironmental effects of industries and plantsRenewable Energy Sustainability and the EnvironmentLife cycle assessment Supercritical water Waste treatmentsParticulates021001 nanoscience & nanotechnologyResource depletionOzone depletionSupercritical fluidEnvironmental sciencesWaste treatmentEnvironmental science0210 nano-technologysupercritical water; life cycle assessment; waste treatments
researchProduct

Experimental and fluid dynamic study of continuous supercritical water gasification of glucose

2016

Abstract The supercritical water gasification (SCWG) of glucose as a model compound for H 2 production is studied in term of process development at 25 MPa and 650 °C. Gasification has been investigated using a laboratory scale continuous plant comprising a continuous down flow reactor with a volume of 200 cm 3 , a heat recovery section and pre-heat of the biomass to simulate more closely an industrial design. Feed streams (pure water and glucose solution) are introduced at the top of the vessel and products are extracted from the bottom. The reactor is equipped with various inlet points that allow to modify the inlet position of reacting streams in order to study the effect of stream mixing…

ChromatographyFinite volume methodbusiness.industryChemistrySettore ING-IND/25 - Impianti Chimici020209 energyGeneral Chemical EngineeringMixing (process engineering)Continuous stirred-tank reactor02 engineering and technologyMechanicsComputational fluid dynamicsCondensed Matter PhysicsSupercritical fluidVolume (thermodynamics)0202 electrical engineering electronic engineering information engineeringFluid dynamicsCFD High pressure supercritical water glucose gasificationPhysical and Theoretical ChemistrybusinessPlug flow reactor modelThe Journal of Supercritical Fluids
researchProduct

Supercritical water gasification of waste oils as a source of syngas

2021

A huge amount of waste oil is produced worldwide. Also substantial amount of virgin oils is available that are interesting candidates for upgrading into syngas. Supercritical water gasification (SCWG) can be considered as an aqueous phase reforming process to produce syngas from oils. In this work, a variety of waste and virgin oils were gasified in a continuous down-flow autoclave reactor at supercritical conditions. Experiments were carried out at 430 °C and 660 °C, 25 MPa, with a residence time in the range 103-170 s, in order to investigate gasification and carbon efficiency, hydrogen yield and composition of the produced gas. All the analysed feedstocks were suspended in water at vario…

SCWG supercritical water gasification waste olis syngas
researchProduct