TEA为主体混合胺法脱碳胺液的筛选及配比优化研究

发布时间：2018-05-16 20:01

本文选题：天然气脱碳 + TEA　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：随着天然气需求量的不断增长,天然气净化技术的开发和研究越发重要。天然气脱碳是预处理工艺的关键环节,目前胺法脱碳技术在天然气脱碳领域得到了广泛应用,其中混合胺法因吸收能力强、反应速度快、适用范围广、再生能耗低、气体损失小、净化程度高、溶液腐蚀小等优点而被广泛关注。而吸收剂本身的性能直接影响天然气的净化效果,胺液吸收剂种类繁多且各有特点,因此筛选出一种高效节能且深度脱碳的胺液配方十分重要。目前国内外普遍采用以MDEA(甲基二乙醇胺)为主体的复配胺液为吸收剂,为适应寻找经济、高效的新型吸收剂的需求,本文选取同为叔胺的TEA(三乙醇胺)为主体进行混合胺液的优选研究。本论文首先针对TEA单一胺液展开小型试验研究,通过吸收和解吸试验的结果分析TEA的吸收和解吸性能,并确定了配方优选试验的操作参数;在单一胺液的研究基础上,对TEA为主体的混合胺液展开配方优选研究,分别在TEA主体胺液中添加A、B、C、D、E五种添加剂,考察不同添加剂对混合胺液吸收解吸性能的影响,筛选出A、C及E为较优的添加剂;然后分别研究了三种不同浓度配比的TEA+A、TEA+C以及TEA+E混合胺液的吸收与解吸性能,筛选确定最优的混合胺液配比分别为2mol/LTEA+1mol/LA、2mol/LTEA+1mol/LC、2.4mol/LTEA+0.6mol/LC和2mol/LTEA+1mol/LE;针对四种较优的混合胺液,在循环条件下展开吸收和解吸试验,综合对比评价每种胺液的吸收、解吸及循环性能,筛选出最优的混合胺液配方为2mol/LTEA+1mol/LA;最后利用中试装置和HYSYS软件对最优配方进行试验和模拟的双重验证,验证结果表明,最优配方脱碳效果良好,满足实际天然工业中的净化要求。
[Abstract]:With the increasing demand for natural gas, the development and research of natural gas purification technology is becoming more and more important. The decarbonization of natural gas is the key link of the pretreatment process. At present, the amine-decarburization technology has been widely used in the field of natural gas decarbonization, among which the mixed amine method has strong absorption capacity, fast reaction speed, wide application range and low regeneration energy consumption. The advantages of small gas loss, high degree of purification and small corrosion of solution have attracted wide attention. The performance of absorbent has a direct impact on the purification effect of natural gas. There are many kinds of amine-liquid absorbent and each has its own characteristics. Therefore, it is very important to select a formula of amine-liquid with high efficiency and energy saving and deep decarbonization. At present, MDEA (methyl diethanolamine) is widely used as absorbent in order to meet the demand of economic and efficient new absorbent. In this paper, tea (triethanolamine), which is the same as tertiary amine, is selected as the main body to study the optimization of mixed amine solution. In this paper, a small scale experimental study was carried out on the TEA single amine solution. The absorption and desorption properties of TEA were analyzed by the results of the absorption and desorption tests, and the operating parameters of the formula optimal selection test were determined, on the basis of the study of the single amine solution, the absorption and desorption properties of TEA were analyzed. The formulation of the mixed amine solution with TEA as the main body was studied. Five kinds of additives were added to the main amine solution of TEA. The effects of different additives on the absorption and desorption of the mixed amine solution were investigated, and the better additives were screened out. Then, the absorption and desorption properties of three different concentrations of TEA tea C and TEA E mixed amines were studied, and the optimum mixture ratio was determined to be 2mol/LTEA 1 mol / L L 伪 2 mol / L T EA 2. 4 mol / L LTEA 0.6mol/LC and 2mol/LTEA 1 mol / L LE. for four kinds of mixed amines, The absorption and desorption tests were carried out under cyclic conditions, and the absorption, desorption and cycling properties of each amine solution were compared and evaluated. The optimal mixture of amines was selected as 2mol/LTEA 1mol / L a. Finally, the optimal formula was tested and simulated by pilot plant and HYSYS software. The results showed that the decarbonization effect of the optimal formulation was good. To meet the purification requirements in the actual natural industry.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE644

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