活化MDEA与混合胺适应性研究

Study on the adaptability of activated MDEA and mixed amines

关键词:  活化MDEA  混合胺  串级吸收  天然气  脱硫  脱碳  适应性

Key words:  activated MDEA  mixed amines  cascade absorption  natural gas  desulfurization  decarbonization  adaptability

摘要:

拟采用活化MDEA与混合胺两种溶剂处理天然气中的酸性组分H₂S和CO₂,基于活化剂PZ和DEA与CO₂反应的机理不同,针对高含碳不含硫和高含碳高含硫两种气质进行了研究。通过ASPEN HYSYS 9.0模拟软件,以典型活化MDEA(PZ+MDEA)与混合胺(DEA+MDEA)作为吸收剂,研究两者的脱硫脱碳效果。结果 表明:针对高含碳不含硫天然气,在达到相同的脱碳效果和相同的酸气负荷前提下,采用活化MDEA作为吸收剂体现出明显节能优势；针对高含碳高含硫天然气,在达到相同的脱碳效果和酸气负荷的前提下,采用混合胺作为吸收剂更节能。

Abstract:

In this paper, two kinds of solvents, activated MDEA and mixed amine were used to treat the acidic components H₂S and CO₂ in natural gas. Based on the different reaction mechanism of PZ and DEA with CO₂, two kinds of gas composition of high CO₂ content without H₂S and high CO₂ and H₂S content were studied. Through ASPEN HYSYS 9.0 simulation software, typical activated MDEA (PZ+MDEA) and mixed amine (DEA+MDEA) were used as absorbent to study the deacidification effect of both. The results showed that for the natural gas of high CO₂ content and non-H₂S, the activated MDEA as absorbent showed obvious energy saving advantages under the same decarburization effect and acid gas load. According to the natural gas of high CO₂ and H₂S content, using mixed amine as absorber could save more energy by the premise of achieving same decarburization effect and same acid gas load.