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.
Results
Showing 1 to 13 of 13 for “"CO2/H2"”.
-
Carbon Dioxide Gas Separation from Syngas to Increase Conversion of Reverse Water Gas Shift Reaction via Polymeric and Mixed Matrix Membranes
… reaction to increase the overall conversion of CO2 to CO. This process involves a separation and recycling process to reuse the unreacted CO2 from the RWGS reactor. The carbon monoxide produced from this reaction, alongside hydrogen (composing syngas), can be used in the Fischer-Tropsch process …
-
CARBON STRUCTURES AND Mg-BASED MATERIALS FOR GAS SORPTION
… storage properties of Mg-based materials and CO2 storage of MgO. The effects of the plasma reactor’s flow rate, temperature and power were evaluated for the formation of the carbon structures. TEM shows that the carbon consists of spherical particles of 40.8±8.7 nm in diameter and graphene …
-
Simultaneous production of methanol and dimethylether from synthesis gas
… synthesis of methanol by hydrogenation of CO/CO2 over a copper based catalyst and subsequent dehydration of methanol to DME over an acidic catalyst. Alternatively, DME can be produced in an one-step (direct) process using a hybrid (bifunctional) catalyst system that permits both methanol …
-
Gasification of in-Forest Biomass Residues
… Gaseous products were primarily composed of CO2, H2, CH4, and CO, generally in that order of prevalence. The highest hydrogen yield, 43% mole percent, was achieved at 900k with a 5% biomass loading. In general, low biomass loadings corresponded to higher H2:CO2 ratios, but never did we …
-
Kinetic Modeling of a Transport Coal Gasifier
… was observed for the other gases present (CO, CO2, H2, CH4). The TGA data only spans a range of steam concentrations up to an equivalent TRDU steam concentration of six percent. The TRDU operates at concentrations as high as 17 percent. Therefore, research on higher steam concentrations, …
-
Utilisation of biomass-derived gaseous fuels using solid-oxide fuel cells
… produced mixtures of H2 and CO2 (biohydrogen) from processes such as dark fermentation or photo-fermentation are versatile feedstocks which can potentially be utilised in SOFC devices. In this work, solid oxide electrolysis of biohydrogen has been investigated for the …
-
Katalytische Hydrierung in Mehrphasensystemen auf Basis von ionischen Flüssigkeiten und Kohlendioxid
Carbon dioxide (CO2) and ionic liquids (ILs) have been intensively studied as solvents in catalysis. The combination of ILs and CO2 and its interaction with third components has attracted only sparse interest in research. In the literature, the IL/CO2 system is discussed as a promising technique …
-
Role of fluids in geological processes
Water and other volatiles (e.g. CO2, H2, CH4, etc.) are crucial components on Earth that ensure the habitability of the planet and play an important role in many geological processes. Small aliquots of these fluids can be preserved in the geological record as fluid inclusions and can provide …
-
Impact of impurities on thermo-physical properties of CO2-rich systems : experimental and modelling
… technologies for reducing the emission of CO2 in the atmosphere. Carbon dioxide capture and storage (CCS) is one of the most promising technologies that can eliminate/reduce global warming, helping the world to move towards a low-carbon society. The process comprises of the separation of …
-
Fractional Catalytic Pyrolysis Technology for the Production of Upgraded Bio-oil using FCC Catalyst
… the catalyst selectivity in the formation of CO, CO2, H2, CH4, C2-C5 hydrocarbons and aromatic hydrocarbons. The addition of ZSM-5 additive to the FCC catalyst was found to alter the characteristic/functionality of the catalytic medium. The product slate showed decrease in coke yield and increase …
-
Biomass gasification in small scale plants: experimental and modelling analysis
… comprise a mixture of the permanent gases CO, CO2, H2 and CH4, steam, char, tars and ash. The raw synthesis gas needs to be cleaned from tars before it may be upgraded to other commodities. In most cases if tars deposit on the catalyst surface it will block the active sites i.e., carbon acts as …
-
Semi-Artificial Photoelectrochemistry through Perovskite Integration and Elucidation of the Local Environment
Semi-artificial photoelectrochemistry combines state-of-the-art semiconductors developed in the photovoltaic industry with highly selective and active biological catalysts evolved for specific fuel-forming reactions. The biohybrids combine the benefits of both photovoltaic and bioelectrochemical …