炼化企业碳流动与隐含碳排放分析

Analysis on carbon flow and hidden carbon emissions in refining companies

炼化企业是传统的能源和排放密集型行业,其低碳化发展对我国节能减排具有重要的意义。以物质流分析方法为基础,建立了企业内部碳流动分析模型。以国内某1 000万t/a大型炼化企业为例,分析了该企业2015年碳流动规律并计算了隐含碳排放量,预测了3种情景下该企业2016—2035年间的CO2减排趋势。结果表明,每加工1 t原油会产生82 kg的隐含碳排放;二次加工是隐含碳排放量最大的环节,约占总量的75.1%,其中,延迟焦化装置是隐含碳排放的主要工序,约占总量的42.8%;到2035年,3种情景下相对2015年可分别减少隐含碳排放11.7%、14.9%和19.6%。

The refining industry is a traditional energy and emissions intensive industry.The low-carbon development of refining industry is of great significance for energy-saving and emission reduction in China. An intra-enterprise carbon flow analysis model is established based on material flow analysis（MFA） method. Taking a 10 million t/a refinery in China as an example,the carbon flow rule and the hidden carbon emissions for the refinery in 2015 are analyzed and calculated respectively.Furthermore,the trends of CO2 emissions reduction in this refinery during the period of 2016—2035 are predicted under three scenarios.It is found that 82 kg of hidden carbon emissions will be generated when one ton of crude oil is processed.Secondary processing section is the largest part of the hidden carbon emissions,accounting for about 75. 1% of the total emissions. Among them,the delayed coking unit is the main process for implying carbon emissions,accounting for about 42. 8% of the total hidden carbon emissions. Compared with levels in 2015,the hidden carbon emissions by 2035 can be reduces by 11. 7%,14. 9% and 19. 6%,respectively under these three scenarios.