Department of Chemical Engineering
Rashed Sheikh's Webpage
Phone: +44 (0)20 7679 7683
Department of Chemical Engineering
University College London
London WC1E 7JE
Rashed graduated from University College London with a Chemical Engineering with a Study Abroad MEng degree in 2008, which he took in collaboration with the University of Federico II in Naples, Italy and the University of Foreigners in Perugia, as part of the Erasmus Exchange Programme.
His research in Italy was in process design and optimization of fuel cell processing systems, using gas chromatography and thermal imaging techniques. He further pursued his interests in electrochemical engineering and process design within the Centre for CO2 Technology at UCL.
During his post-graduate studies, Rashed has been involved in the synthesis of cementious silicate compounds in molten salts, the development of in-situ monitoring techniques to measure pO2- ion activity (responsible for corrosion reactions in molten salts), in collaboration with Prof. Douglas Inman (Imperial College, London) and thermodynamic equilibrium modelling of chemical reactions in such environments.
Rashed recently obtained the Entente Cordiale Scholarship in 2012 to continue his research at University of Marseille in France, in collaboration with Prof. Gaune Escard (University of Marseille, France) and Prof. Leszek Rycerz (University of Wroclaw, Poland)
Title: A molten salt route to calcium silicate manufacture
This project represents an innovative, radical approach to the development of green and sustainable technologies through the development a high-temperature process. The proposed work programme is multidisciplinary in nature, involving chemical engineers, material scientists, chemists and geochemists and incorporating a high level of expertise in the manufacture of cement, its chemical and physical properties and in molten salt systems.
The investigation is to synthesize cement mineral powders using a molten salt process. The conventional method of cement production is to heat limestone and clay together in kilns at temperatures equal to or greater than 1450°C and then to grind the material to the required particle size. For each tonne of product a similar amount of CO2 is produced, leading to global emissions of 1,800 Mt CO2 per annum. Cement therefore has a high embodied energy (up to 6 GJ/tonne) in terms of heating and grinding. In addition, cement is a globally important product. It is used to produce 6000 Mm3 of concrete annually at a global sales value of 450,000M and concrete is the principal material used by the construction industry, a sector that accounts for 11% of global GDP (10% of UK GDP) and employs more than 100 million people worldwide (1.5M in the UK). Hence, there is no doubt of the global importance of cement, which comes at the price of significant environmental impacts.
Since the market for cement is of very high volume but the value of the product itself is relatively low, the cement industry is slow to incorporate significant process changes to reduce its emissions. However, if we are serious about meeting the challenges of climate change, new methods of manufacturing such products must be developed to reduce the energy demand and, hence, the subsequent CO2 emission levels.
The project applies thermodynamic equilibrium modeling of chemical reactions in molten salt systems to guide experimental synthesis of principal cement clinker minerals. The results of the research will go a long way to optimizing the new process with respect to commercial exploitation.
Page last modified on 04 dec 12 10:23