Monitoring of CO₂ Absorption Solvent in Natural Gas Process Using Fourier Transform Near-Infrared Spectrometry

Table 1

Amine, CO₂, and water content in the prepared solvent sample.

Sample	Actual composition, wt.%			mol CO2/mol amine
	Amine	CO2	Water
1	57.25	4.65	38.10	0.21
2	55.33	8.17	34.03	0.38
3	54.03	8.92	33.47	0.42
4	50.28	2.58	41.38	0.13
5	49.21	0.69	42.45	0.04
6	48.66	0.69	43.88	0.04
7	47.96	6.42	40.58	0.34
8	47.11	1.55	47.62	0.08
9	46.45	4.73	46.32	0.26
10	45.72	0.97	53.30	0.05
11	40.81	3.80	50.65	0.24
12	40.26	6.96	49.29	0.44
13	40.05	7.13	50.36	0.46
14	35.05	1.07	63.10	0.08
15	34.73	3.26	62.69	0.24
16	33.49	5.10	54.44	0.39
17	32.96	5.81	59.15	0.45
18	32.52	4.99	60.01	0.39
19	31.95	5.69	56.48	0.46
20	31.35	8.49	55.83	0.69
21	30.45	9.36	48.78	0.79
22	29.43	2.90	67.28	0.25
23	27.76	4.59	64.27	0.42
24	27.60	4.45	56.99	0.41
25	26.95	4.65	60.01	0.44
26	23.20	3.50	73.30	0.39
27	21.83	3.183	58.32	0.37
28	21.42	6.15	67.98	0.73
29	20.69	6.72	75.01	0.83
30	20.08	0.64	79.28	0.08