臺灣博碩士論文加值系統

以醇胺(alkanolamine)水溶液作為吸收劑,將酸性氣體如二氧化碳與硫化
氫做有效的處理,是最常用的氣體處理程序。一般使用的一級醇胺 MEA(
Monoethanolamine)對於二氧化碳吸收速率雖高，但有低吸收負載及高反
應熱等缺點；近年來發展的一級具立體障礙醇胺AMP(2-amino-2-met
hyl-1-propanol)有高吸收負載及良好的汽提特性，因此藉適當比例混合
此兩種醇胺，期望能結合兩者醇胺優點,彌補兩者醇胺的缺點,找出一種符
合經濟效益及減少環境污染的新吸收劑配方。氣液平衡數據為設計吸收設
備之重要依據。本研究目的即針對CO2/ H2S/MEA/AMP/H2O 系統，測量氣
液平衡的溶解度數據。本研究測量： (一).單一氣體硫化氫和二氧化碳
在 MEA/AMP 混合醇胺水溶液中的溶解度，所探討的組成：30 wt% MEA
，24 wt% MEA + 6 wt% AMP，18 wt% MEA + 12 wt% AMP，12 wt% MEA +
18 wt% AMP，6 wt% MEA + 24 wt% AMP，30 wt% AMP;溫度
為40,60,80.100℃;硫化氫分壓:0.5-200kPa;二氧化碳分壓:0.5-200kPa
。 (二):混合氣體硫化氫和二氧化碳在 3M MEA + 2M AMP,2M MEA + 3M
AMP 混合醇胺水溶液中,溫度為 40,80℃的溶解度,總酸性氣體分壓在200
kPa以下。並利用 Kent and Eisenberg的修正方法來建立熱力學模式,以
CO2/H2S/MEA/AMP/H2O 系統之氣液平衡實驗數據迴歸其中的參數,來描述
研究成果,結果可做為內差及外差的工具。

The solubilities of the mixtures of CO2 and H2S in aqueous MEA
(monoethanolamine) / AMP (2-amino-2-methyl-1-propanol)
solutions have been measured. The systems studied are CO2/MEA/
AMP/H2O,H2S/MEA/AMP/H2O,and CO2/H2S/MEA/AMP/H2O. For CO2/MEA/
AMP/H2O and H2S/MEA/AMP/H2O solutions,six blended amines solut
ions(a total of 30 wt%) were selected for measurements for tem
peratures 40 to 100 C. For CO2/H2S/MEA/AMP/H2O systems, the va
por-liquid equilibrium studied are 3M MEA + 2M AMP and 2M MEA
+3 M AMP at temperatures 40 and 80 C and for the partial press
ures of the acid gases (CO2 or H2S) ranging from 1.0 to 160 kP
a. THe obtained vapor-liquid equilibrium data have been correl
ated based on the method of Kent and Eisenberg. The binary par
ameters in the model were determined by fitting to the equilib
rium solubility data.Satisfactory results were obtainded for
calculation of the solubility of CO2 and H2S in MEA + AMP aque
ous solutions for the systems tested. The use of blended amine
s in gas-treating process has been shown to be attractive and
with great potenial.The results of this study can be used as an
important vapor-liquid equilibrium data base for design of the
gas treating process units using MEA / AMP as absorption fluids.
Also,the data can also be used to develop thermodynami ces
model involving the solubilities of CO2 and H2S in MEA + AMP
+water systems.