Critical evaluation of the oxygen-enhanced combustion in gas burners for industrial applications and heating systems

Abstract

O conceito de eficiência energética em equipamentos está cada vez mais em pauta com os desdobramentos do aquecimento global e, dentre os equipamentos industriais, os queimadores possuem um dos maiores impactos nesta discussão por se tratar de um equipamento de combustão industrial. A procura por queimadores mais eficientes energeticamente é imprescindível para o adequado uso de combustíveis fósseis durante a fase de transição entre esta fonte de energia para as energias alternativas, a qual pode durar mais de cinquenta anos. O presente trabalho traz uma avaliação do uso da técnica de combustão enriquecida com oxigenio (OEC), identificando importantes pontos, especialmente na transferência de calor e na emissão de poluentes, para a aplicação desta técnica na indústria de petróleo e sua cadeia, na qual a utilização da OEC é raramente usada. Não foi identificada na literatura uma revisão crítica do uso da OEC e as implicações do seu uso na indústria de petróleo e gás.The concept of energetic efficiency in equipments is highlighted nowadays, due to its implication with the global warming issues. Amongst industrial equipments, burners have one of the greatest impacts on this discussion, since they are large scale combustion devices. The search for more efficient burners is of paramount importance, toward a more adequate use of the fossil fuels, during the transition phase between this energy source and new alternatives, which may last more than fifty years. The present work brings an evaluation of the Oxygen Enhanced Combustion technique (OEC), identifying important issues, especially those related with the heat transfer and emission of pollutants, and discussing its application in the oil industry and its supply chain, where the OEC is barely used. As far as the authors could search in the literature, there are no published critical reviews regarding the use of OEC and its implications in the oil and gas industry.

Enriched Oxygen for Crude Oil Preheating in Petroleum Refining

“…At the region of 20 to 40 mol% oxygen, the fuel-saving function is almost linear and the saving is noticeable. This zone is also favorable for the refinery as no major process modification will be required for the integration of enriched oxygen stream [22]. Above 40 mol% of oxygen, the effect of enriched oxygen becomes less effective on fuel saving.…”

Thermodynamic assessment of CO2 to carbon nanofiber transformation for carbon sequestration in a combined cycle gas or a coal power plant

“…The configuration of a CNF CC power plant can utilize the pure oxygen produced by the electrolysis, the anodic product of the carbon dioxide splitting, to improve the efficiency of the combustion include happen for a variety of reasons, ranging from a decrease in partial combustion as more oxidant is present, the reduction of NO x present as less nitrogen is available, and the higher temperatures reached which allow for improved thermodynamic efficiency [35][36][37][38][39][40]. This transition to an oxy-fuel combustion process reduces the impurities in the exhaust gas, which will prevent side reaction from occurring in the electrolysis chamber.…”