富含CO_2天然气偏差因子计算模型及影响因素研究

运用常规状态方程、理论图版、经验公式计算富含CO2天然气的偏差因子会产生较大偏差。以实验数据为基础,采用常用的气体偏差因子计算模型及校正方法计算不同CO2含量的气体偏差因子,并与实验值进行对比,从而评价出富含CO2天然气偏差因子计算模型的适应性。结果表明:校正模型的计算精度普遍高于未校正模型;GXQ校正法的计算误差普遍小于WA和CKB校正法;最为准确的是结合了GXQ校正的DAK模型,其平均相对误差仅为1.93%。另外,基于DAK模型和GXQ校正法的计算结果,分析了富含CO2天然气偏差因子随温度、压力及CO2含量的变化规律。

Study on CO_2 Emission Reduction from Chinese Coal-Fired Power Plants Between 1993 and 2010

Based on the Chinese thermal coal and power generation data,such as ultimate analysis,proximate analysis,low heat value(LHV)on as received basis,power generation volume,thermal coal consumption volume and net coal consumption rate,several mathematical models for calculating CO 2 reduction by Chinese coal-fired power plants are established.Calculations of the CO 2 emission factor(CEF),the CO 2 emission volume and reduction volume are made according to these models.The calculation results reveal that between 1993 and 2010,the CO 2 emission volume reached 31.069 Gt,reduced by 0.439 Gt,averaging 28.83 Mt each year.

长流程钢铁企业的碳代谢模型与碳排放分析

钢铁生产作为高CO2排放产业,其碳减排对我国实现节能减排目标至关重要。文章综合了不同国家和组织提出的钢铁企业CO2计算方法,提出了针对中国长流程钢铁企业的CO2计算模型,结合各工序的特点,将CO2排放分为两部分:燃烧排放与工艺排放,并定义了系统边界与排放因子。在此基础上,对比分析了两家案例钢铁企业,CO2排放强度分别为1362. 95 kg/t和1525. 97 kg/t,结合碳物质流分析(C-SFA)绘制了碳代谢图,准确找出碳减排的薄弱环节,为后续制定减排措施提供参考。