Clean fossil fuel heat and power plants - Introduction

In 1992 the United Nations framework convention on climate change was signed. This contributed to increase focus on emissions of the climate gas CO₂. Today 35 % of global CO₂ emissions come from power and heat production [IEA 2005]. To reduce some of the world's emissions, one can capture CO₂ from thermal power generation and deposit it in suitable underground structures.

CO₂ is produced when hydrocarbon containing fuels are combusted. Natural gas, oil and coal are examples of suitable fossil energy sources for power generation. Nebb is working with various concepts of fossil fuel fired heat and power production. Our main focus is the oxyfuel technology with zero emissions of CO₂ and NO_X.

In the oxyfuel process, the first step is to extract oxygen from air. In the second step, natural gas is combusted with pure oxygen in a gas turbine. The oxyfuel combustion product is a mixture of mainly CO₂ and steam. In the third step, the vapour is condensed out and the CO2 can be sent to storage.

In depth knowledge of the power production processes are necessary for designing an optimal cycle for production of heat and electricity with CO₂ capture. Based on our experience, Nebb has developed several unique oxyfuel process solutions.

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