Nebb Oxyfuel Solutions

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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 times-to-market. Finding these solutions requires close contact with potential equipment suppliers. Our process solutions include:

To achieve high efficiency in the oxyfuel power processes, it is essential to use the condensing energy of the steam in the exhaust gas, which consists mainly of CO2 and H2O. This means that it is a mixture of condensing and non-condensing elements. In a conventional condenser, the non-condensing part of the gas will accumulate near the heat transfer surfaces and significantly reduce the efficiency of the condensation/heat transfer process. To avoid extremly large equipment sizes, new principles of equipment design will need to be developed. This is within Nebb's focus area; progress so far includes the development of design principles for a high-efficiency condenser.

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 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 Cycle

Nebb has developed an oxyfuel power process which demonstrates an optimal separation of CO2 and H2O.

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Industrial Heat and Power

A number of industrial sites have a sigificant demand for pure steam for their various production processes.

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ZENG

The ZENG project was a concept definition study and economic analysis of a nominal 70 MWe Zero Emis

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Combined Hydrogen and Power Production

The largest sources of CO2 emissions are carbon-containing fuel fired power production and the transport sector.

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Oxyfuel Coal

Coal is a dominant carbon-containing fuel source for power production in most parts of the world.

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Concept Study: the Cesam Process

Concept study with funding from

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Nebb CESAM

Post combustion carbon capture by, for example, amine absorption, is a technology fit for both power plants and industrial CO2

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