Revolutionizing the sustainable energy technologies
Nebb is dedicated to the development and application of oxyfuel technology for CCS. Several applications of the technology have been developed during our many years of research and process development.
The projects have received financial support from the Research Council of Norway and Gassnova. Some of the solutions are patented. In addition, an oxyfuel power plant concept definition study has been undertaken by Nebb for ZENG AS.
Nebb is involved in improving the extant solutions for increasing cycle efficiency.
We have focused in the last few years on the development of the complete cycle through process simulations and contact with equipment suppliers. Developing highly efficient process cycles is, of course, the main long term aim. But achieving high efficiency is a demanding and time-consuming development task, which leaves a requirement for process solutions with shorter time-to-market. Finding these solutions requires close contact with potential equipment suppliers. Our process solutions include:
Nebb is actively seeking close cooperation with essential equipment manufacturers in order to take this technology further.
Based on the Carnot principle, the thermal efficiency of a power process increases as the heat supply gets hotter. Thus, turbines with high turbine inlet temperatures are required for high-efficiency gas turbine cycles. Oxygen-fired gas turbines are not a mature technology, and development is required to obtain an oxyfuel process with high thermal efficiency. Such turbine development will naturally be a task for turbine suppliers. Therefore Nebb is in close contact with turbine suppliers who develop oxyfuel turbine solutions. An oxyfuel gas turbine development program is a necessary and essential initiative to obtain mature highly efficient oxyfuel technology.
Another essential element in an oxyfuel power cycle is the combustion process. It is crucial to achieve an efficient combustion process close to stoichiometric (ideal) combustion to achieve high efficiency in the overall cycle and to minimize the level of impurities in the gas. Nebb has close contact with Clean Energy Systems (CES) in California, developer of the most advanced and efficient oxyfuel combustion chambers in the world.
Nebb has developed an oxyfuel power process that demonstrates an optimal separation of CO2 and H2O.
A number of industrial sites have a significant demand for pure steam for their various production processes.
The ZENG project was a concept definition study and economic analysis of a nominal 70 MWe Zero Emission Oxyfuel Demonstration Power Plant. The project, situated in Risavika, Stavanger (Norway), displayed close to 100% CO2 capture and no NOx emissions.
The largest sources of CO2 emissions are carbon-containing fuel-fired power production and the transport sector.
Coal is a dominant carbon-containing fuel source for power production in most parts of the world. It is thus also responsible for most of the CO2 emissions from power production. Nebb has developed a process for oxyfuel power production based on solid fuels. The fuels may be, for example, coal or biomass.
Post-combustion carbon capture by, for example, amine absorption, is a technology fit for both power plants and industrial CO2 emissions, including new builds and retrofits.