The fixation of molecular oxygen into organic compounds is one of the key steps in the biodegradative side of the carbon and oxygen cycle in nature in that it initiates the aerobic degradation of many compounds. This process recycles carbon and is mediated by microbial enzymes called oxygenases. Many aromatic hydrocarbons / such as benzene and naphthalene / are priority pollutants in the environment and their remediation is mediated by such microbial enzymes. In addition, these enzymes have turned out to be very useful in producing high value compounds that are of potential value in the pharmaceutical and chemical industry. Such chemicals are extremely difficult to make chemically. This because the enzyme, unlike cruder chemical reactions, can accurately add chemical groups, in the case of di-oxygenases hydroxyl groups, to produce chiral molecules / that is either one of a pair of compounds that are mirror images on each other but are not identical. The current understanding is that microbial dioxygenases / that incorporate two oxygen atoms into aromatic compounds / employ an electron transfer process from cellular cofactors through a complex of proteins. Recent work here has indicated that we have discovered a very novel and potentially more efficient electron transfer system in soil bacteria called rhodococci. We intend to study the mechanism involved in this process in detail. Exploitation of this oxygenase system in these bacteria has significant implications for the efficient production of new chiral compounds.

Mankind faces great challenges in providing sufficient supplies of renewable energy, in protecting our environment, and in developing benign processes for the chemical and pharmaceutical industries. These urgent problems can only be solved by applying the best available technology, but this requires a solid foundation of fundamental knowledge created through a multidisciplinary yet focussed approach. Catalysis is an essential enabling technology because it holds the key to solving many of these problems. CASTech aims to build on the science and engineering advances developed in previous collaborative programmes involving the main participants. Specifically, new core competencies for the investigation of reactions in multiphase systems will be developed. These will include MR imaging techniques (University of Cambridge, UCam); computational fluid dynamics (UCam); spectroscopic methods (QUB); SSITKA (QUB); flow visualisation and particle tracking (PEPT) (University of Birmingham, UBir); theoretical calculations (University of Virginia, UVa; QUB) for liquid phase processes. An enhanced time resolution fast transient and operando spectroscopy capability will be developed for investigating the mechanisms and the nature of the active sites in heterogeneous catalytic gas phase reactions (QUB). These core competencies will be applied to investigate the activation of saturated alkanes, initially building on our recent success in oxidative cracking of longer chain alkanes.We propose to develop our experimental and modelling capabilities with the objective of providing quantitative data on how to enhance the performance of a catalytic system by understanding and controlling the interaction between the solvent(s), the substrates and the catalyst surface. We aim to be able to describe the structure of liquids in catalytic systems at multiscale from the external (bulk) liquid phase to inside the porous structure of the catalyst and at the catalyst surface. The research will integrate new experimental probes and complementary theoretical approaches to help us understand liquid structures and we will use this information in collaboration with our industrial partners to address specific technical challenges.Bio-polymeric materials, e.g. cellulose and lignin, have the potential to provide functionalised building blocks for both existing and novel chemical products. Our ultimate aim is to provide novel and economically viable processes for the conversion of lignin into high value-added products. However, by starting with the conversion of lignosulphonates into vanillin and other higher value chemicals we will develop not only new processes but also the core competencies required to work with more complex fluids.Biogas (CH4 + CO2) can be produced from many different renewable sources but capturing and storing the energy is difficult on a small distributed scale. We propose to investigate a new, economic, down-sized engineering approach to the conversion of methane to dimethylether. This will be achieved by reducing the number of unit operations and developing new catalysts capable of performing under the more extreme temperature conditions that will be required to make the process economic.The drive to use catalysts for cleaner more sustainable chemistry needs also to address the inherently polluting and unsustainable process of catalyst manufacture itself. We will investigate the sustainable production of supported catalysts using electrochemical deposition of the metal. This method bypasses several conventional steps and would generate very little waste. In all these Grand Challenges there will be close collaboration between all the academic and industrial groups.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.