1 |
The use of a roadside remote sensing device to encourage voluntary vehicle emissions related maintenanceFelstead, Timothy James January 2007 (has links)
No description available.
|
2 |
Determinants of indoor PMâ‚‚.â‚…, black smoke, VOCs and NOâ‚‚Lai, Hak Kan January 2006 (has links)
No description available.
|
3 |
Toxic metal and NOx emissions from pulverised solid fuel combustionClark, Kevin David January 2005 (has links)
No description available.
|
4 |
Trace element emissions from co-combustion of coal, biomass and wasteAripin, Wildan January 2003 (has links)
No description available.
|
5 |
Development of a multi-species tunable diode laser spectrometer for the in situ and remote sensing of vehicle emissionsGeÌrard, Yvan January 2005 (has links)
No description available.
|
6 |
Measurement of hydrocarbons and peroxyacetyl nitrate in the troposphere and lower stratosphereWhalley, Lisa Kathryn January 2004 (has links)
No description available.
|
7 |
The capture of COâ‚‚ from flue gas using adsorbents developed from pulverized fuel ashSmith, Karl M. January 2006 (has links)
No description available.
|
8 |
The role of moisture in the measurement of PMâ‚â‚€ in urban airBulpitt, Susan January 2004 (has links)
No description available.
|
9 |
High temperature CO2 sequestration using solid absorbents : lithium zirconate and Mg-Al hydrotalciteIwan, Alina Agnieszka January 2008 (has links)
Sorption enhanced steam reforming of methane (SESMR) is realised by combining the reforming and shift reactions with in-situ removal of the produced CO2. This combination produces a favourable shift in thermodynamic equilibrium towards hydrogen production and enables lower operational temperature and pressure. Also by removal of the main by-product, CO2, the requirements for hydrogen purification decrease. The process allows the release of CO2 in a concentrated form for further lestration if necessary. The removal of CO2 can be achieved by using solid acceptors which can reversibly sorb CO2 from the reaction zone and release it under favourable conditions. This work is focused on developing materials suitable for the SESMR ess, i.e. selective acceptors for COo at temperatures between 450-500 °C, 0-1 bar partial CO2 pressure under dry conditions. Sorption of CO2 on two candidate materials: hydrotalcites and lithium zirconate based materials, was studied.
|
10 |
Continuous-flow reactions of diols in supercritical carbon dioxideGooden, Peter N. January 2006 (has links)
The continuous O-alkylation of alcohols and diols has been studied over solid acid catalysts in supercritical carbon dioxide, scC02, to examine the potential for performing highly selective, clean etherification reactions. An introduction to the application of these reactions with respect to green chemistry is presented in Chapter 1, focusing in particular, on the industrial use of alternative solvents and solid acid catalysts. The apparatus, experimental methods and analytical techniques are described in Chapter 2, and their use is illustrated with reference to the acid catalysed esterification of 1,6-hexanediol in SCC02. Chapter 3 details the etherification of the symmetrical diol substrate, 1,6-hexanediol, which was investigated using primary alcohols (MeOH, EtOH and n-PrOH) as alkylating agents. This system showed remarkable pressure tunability with the desymmetrised mono-ether being favoured at high system pressures, and the bis-ether formed selectively at low pressure. When studying other diols, intermolecular etherification was only observed at primary OH groups, secondary OH groups preferentially underwent elimination or formed cyclic ethers when the substrate structure allowed. The etherification of the commercially important di-hydroxy substrate, isosorbide, was also attempted in scC02, and the results are presented in Chapter 4. The OH groups of isosorbide, an unsymmetrical molecule, exhibited vastly differing reactivity, and achieving good selectivity to the desired product, dimethyl isosorbide (DMI), proved difficult. In addition, the formation of dimethyl ether (DME), an undesirable by-product formed from unreacted MeOH, means that these processes currently have limited commercial potential. Dimethyl carbonate (DMC) has also been studied as a potentially benign reagent for the formation of methyl ethers in scC02, shown in Chapter 5. DMC was observed to decompose over acid catalysts to form DME and C02, but gave excellent yields of the methyl ethers of various substrates. Temperature programmed experiments revealed that the decomposition reaction greatly assisted the methylation of the substrate. This system shows much greater potential for commercial application as highly concentrated substrate solutions can be converted with high yields and selectivities. A brief summary of the conclusions drawn from this Thesis is given in Chapter 6. This Chapter evaluates how well the initial Project aims were met and proposes some future directions for this area of research.
|
Page generated in 0.023 seconds