Alan Chaffee | Monash University (original) (raw)

Papers by Alan Chaffee

… and greenhouse gas …, 2002

... 15 Understanding Brown Coal-Water Interactions to Reduce Carbon Dioxide Emissions Leigh M. Cl... more ... 15 Understanding Brown Coal-Water Interactions to Reduce Carbon Dioxide Emissions Leigh M. Clemow, W. Roy Jackson, Alan L. Chaffee, Richard Sakurovs and ... M3702 MAHFE 1 9 66.9 4.7 0.64 0.21 25.7 High Fe 42 0-44.0 m Maryvate Bore Core M3702 MAMFE 1.7 665 4.6 ...

Biomass and Bioenergy, 2015

ABSTRACT Pressurized thermal decomposition of two marine algae, Pinus radiata chip residue and gr... more ABSTRACT Pressurized thermal decomposition of two marine algae, Pinus radiata chip residue and grape marc using high temperature, high pressure reactions has been studied. The yields and composition of the products obtained from liquefactions under CO of a mixture of biomass and H2O (with or without catalyst) were compared with products from liquefaction of dry biomass under N2, at different temperatures, gas pressures and for CO runs, water to biomass ratios. Thermochemical reactions of algae produced significantly higher dichloromethane solubles and generally higher product yields to oil and asphaltene than Pinus radiata and grape marc under the reaction conditions used. Furthermore, the biofuels derived from algae contained significant concentrations of aliphatic hydrocarbons as opposed to those from radiata pine and grape marc which were richer in aromatic compounds. The possibility of air transport fuel production from algae thus appears to have considerable advantages over that from radiata pine and grape marc.

American Chemical Society, Division of Petroleum Chemistry, Preprints

Page 1. AMINOPROPYL-FUNCTIONALISED SILICAS AS HIGH CAPACITY CO2 ADSORBENTS Gregory P Knowles, Jer... more Page 1. AMINOPROPYL-FUNCTIONALISED SILICAS AS HIGH CAPACITY CO2 ADSORBENTS Gregory P Knowles, Jeremy V Graham, Seamus W Delaney and Alan L Chaffee School of Chemistry, Monash University, Victoria ...

Journal of the Korean Industrial and Engineering Chemistry

ABSTRACT

Crystal Growth & Design, 2015

ABSTRACT A new divergent ligand N,Nʹ-bis(4-carboxyphenylmethylene)ethane-1,2-diamine H4L1 has bee... more ABSTRACT A new divergent ligand N,Nʹ-bis(4-carboxyphenylmethylene)ethane-1,2-diamine H4L1 has been prepared in high yield and used to generate two copper(II) coordination polymer materials poly¬-[Cu(H2L1)(OH2)]•H2O 1 and poly¬-[Cu(H2L1)(OH2)]•H2O•DMF 2. Both networks possess (4,4) sheet topologies and have almost identical compositions and coordination modes. The only major difference between the compounds lies with the conformation of the chelating ethylenediamine cores; compound 1 adopts a trans-(R,R/S,S) conformation, while compound 2 exhibits a cis-(R,S) conformation. This seemingly small difference arising from variation in synthetic conditions influences the extended structures of each network through hydrogen bonding interactions, resulting in the formation of a close packed twofold 2D→2D parallel interpenetrated network for 1, while the extended, non-interpenetrated structure of 2 contains aligned one-dimensional solvent channels. After solvent exchange and evacuation, compound 2 was found to adsorb approximately 35 cm3(STP)/g of CO2 at atmospheric pressure at 273K, with a zero-loading enthalpy of adsorption of -33 kJ/mol, while adsorbing only minimal quantities of N2. These findings are a rare example of conformer-dependent porosity in otherwise geometrically similar frameworks and highlight the importance of understanding weak and fluxional secondary interactions in framework and ligand design.

1 where the volume occupied by interparticular void space, macropores (diameter > 50 nm) and m... more 1 where the volume occupied by interparticular void space, macropores (diameter > 50 nm) and mesopores (50 nm > diameter > 2 nm) may amount for more than 50% of the total storage vessel volume. This project aimed to minimize this 'wasted' volume through the development of carbon monoliths which possess minimal void, macropore and mesopore volume and, at the

Electrochemical storage of hydrogen in activated carbon electrodes as part of a reversible fuel c... more Electrochemical storage of hydrogen in activated carbon electrodes as part of a reversible fuel cell offers a potentially attractive option for storing surplus electrical energy from inherently variable solar and wind energy resources. Such a system – which we have called a proton flow battery – promises to have a roundtrip energy efficiency comparable to lithium ion batteries, while having higher gravimetric and volumetric energy densities. In this paper, a theoretical model is presented of the process of H+ ion (proton) conduction through an acid electrolyte into a highly porous activated carbon electrode where it is neutralised and absorbed on the inner surfaces of pores. A Butler-Volmer type equation relates the rate of adsorption to the potential difference between the activated carbon surface and the electrolyte. This model for the hydrogen storage electrode is then incorporated into a more general computer model based on MATLAB software of the entire electrochemical cell incl...

Letters in Peptide Science, 1996

Fuel Processing Technology, 2015

ABSTRACT Four oil shales from different locations and origins have been reacted in a flow-through... more ABSTRACT Four oil shales from different locations and origins have been reacted in a flow-through system (425 °C, with N2 or H2 as sweep gases at 1 atm pressure) with a view to more closely simulating a practical process for oil shale conversion than can be achieved with a sealed autoclave system.

Dalton transactions (Cambridge, England : 2003), Jan 30, 2015

The synthesis and structural, magnetic and gas adsorption properties of a series of coordination ... more The synthesis and structural, magnetic and gas adsorption properties of a series of coordination polymer materials prepared from a new, highly flexible and internally functional tetrakis-carboxybenzyl ligand derived from 1,2-diaminoethane have been examined. The compound poly-[Ni3(HL)2(OH2)4]·2DMF·2H2O , a two-dimensional coordination polymer, contains aqua- and carboxylato-bridged trinuclear Ni(II) clusters, the magnetic behaviour of which can be well described through experimental fitting and ab initio modelling to a ferromagnetically coupled trimer with a positive axial zero-field splitting parameter D. Compound poly-[Zn2L]·2DMF·3H2O , a three-dimensional coordination polymer displaying frl topology, contains large and well-defined solvent channels, which are shown to collapse on solvent exchange or drying. Compound poly-[Zn2(L)(DMSO)4]·3DMSO·3H2O , a highly solvated two-dimensional coordination polymer, displayed poor stability characteristics, however a structurally related mat...

Journal of Membrane Science, 2015

ABSTRACT A series of mixed matrix membranes (MMMs) using nanoparticles involving carbons, porous ... more ABSTRACT A series of mixed matrix membranes (MMMs) using nanoparticles involving carbons, porous organic polymers and metal organic frameworks were prepared to investigate the impact of water vapor on CO2 separation performance. The water uptake of MMMs using hydrophilic MOFs increased relative to more hydrophobic particles such as POP and carbons and this trend was reflected in the water vapor permeability, which varied by a factor of three between the hydrophobic and hydrophilic MMMs. These changes in water vapor permeability were strongly correlated with the water solubility, indicating that it is this solubility that is the controlling parameter. The calculated water diffusivity was consistent with previously published results. The gas permeability of MMMs in the presence of water vapor was also strongly affected by the nanoparticle hydrophobicity, with membranes composed of hydrophobic fillers out-performing hydrophilic fillers of comparable porosity. However in general, the differences in performance between MMMs and the pure polymer narrowed in the presence of water vapor.

Talanta

A high sulfur Jordanian oil shale was converted into liquid hydrocarbons by reaction at 390 °C un... more A high sulfur Jordanian oil shale was converted into liquid hydrocarbons by reaction at 390 °C under N2, and the dichloromethane soluble fraction of the products was isolated then analyzed by using gas chromatography (GC). Comprehensive two-dimensional GC (GC×GC) and multidimensional GC (MDGC) were applied for component separation on a polar – non-polar column set. Flame-ionization detection (FID) was used with GC×GC for general sample profiling, and mass spectrometry (MS) for component identification in MDGC.Multidimensional GC revealed a range of thiophenes (th), benzothiophenes (bth) and small amounts of dibenzothiophenes (dbth) and benzonaphthothiophenes (bnth). In addition, a range of aliphatic alkanes and cycloalkanes, ethers, polar single ring aromatic compounds and small amounts of polycyclic aromatics were also identified. Some of these compound classes were not uniquely observable by conventional 1D GC, and certainly this is true for many of their minor constituent members...