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Nor Khonisah Binti Daud received her BSc and MSc degrees in Chemical Engineering from University of Science, Malaysia, in 2008 and 2010. She then worked as a tutor at University Malaysia Pahang (UMP) until 2013, and then further her PhD study at the University College London.
Research project
Title: Modelling of CO2 compression and pipeline transportation for Carbon capture and sequestration (CCS).
Power plants built in the 1990s and early years of the new millennium have been typically designed for base load operation, favouring higher efficiency and lower capital costs, with the main objective of minimizing the cost of electricity production. Nowadays, existing and new power plants must face the challenges of the liberalized electricity market, predictability issues regarding renewable sources and the requirement to cover intermediate and peak load constraints, to be able to respond to the variation of the electricity demand. Therefore, not only must conventional natural gas combined-cycle (NGCC) plants be designed for flexible operation, but also coal-fired power plants are now generally required to operate in the mid-merit market.
During the flexible operation, the variation of the throughput of a CO2 capture plant would result in variation of flowrate of CO2 to the transport pipeline and storage site. As a consequence, a two-phase flow or a significant change of the physical properties could occur in the pipeline, if the pressure and temperature are not maintained within a limited range of variation with respect to the normal operation of the capture plant. In case of the storage site, the flowrate of CO2 need to be maintaining at certain level to prevent the unplanned fracturing of the rock, which in the worst case could also fracture the cap-rock.
A few studies have been made on the dynamics of the CO2 transport pipeline systems. However, no information is available on the impact of flexible operation of the upstream units on storage systems because, up to now, the commercial applications of CO2 storage are operated as a base load, i.e. no specific flexibility is required. In this study, the intermediate CO2 buffer storage tank is introduced to maintain a constant flowrate in the pipeline system. The mathematical model will be developed to describe pressure and flow dynamics within the single and pipeline network during operation modes of load change and quick shut-down of the plant.
Education
BSc (Eng) in Chemical Engineering, University of Science, Malaysia (USM),2008
Msc in Chemical Engineering, University of Science, Malaysia (USM), 2010
