Experimental and Application Research of Novel Polyamine-Based CO2 Absorbents in Gas-Fired Power Plants

doi:10.12096/j.2096-4528.pgt.23157

Abstract

Abstract:

Objectives Currently, chemical absorption CO₂ capture technology used in post-combustion is rarely applied in large-scale decarbonization projects in gas-fired power plants due to its high operational energy consumption and total costs. In order to reduce the energy consumption, particularly the regeneration energy consumption, it is necessary to carry out experimental research to improve the performance of chemical absorbents. Methods Two novel polyamine-based absorbents are developed through composition design, laboratory testing with small-scale experimental setups, and engineering validation. Results Compared to monoethanolamine (MEA), the two polyamine absorbents—19% diethylaminoethanol + 9% piperazine + 2% MEA (DT01-5) and 20% 1,4-butanediamine + 5% methyldie-thanolamine+5% 2-amino-2-methyl-1-propanol (DT02-3)—significantly improve absorption loading, absorption rate, desorption rate, and cyclic capacity. Their physicochemical properties are close to those of the 30% MEA commonly used in industrial plants. Through testing on a 2 m³/h small-scale experimental setup, the energy consumption of the two absorbents is reduced by 15.84% and 9.32%, respectively, compared to that of MEA. The 3 000 m³/h industrial test results show that the regeneration heat consumption of the two absorbents decreases by 32.89% and 39.52%, respectively, compared to MEA, while the capture power consumption decreases by 9.83% and 16.14%, respectively. Additionally, other performance indicators improve to varying degrees, resulting in total operating cost reductions of 25.95% and 34.14%, respectively. Conclusions The two novel polyamine absorbents demonstrate strong potential for commercial applications.

Key words: gas-fired power plants, carbon capture, utilization and storage (CCUS), heat consumption, power consumption, absorbents, polyamines, chemical absorption

CLC Number:

TK 09

Zhongyuan HUANG, Xuliang JIN, Fanqin MENG, Aiming YIN, Li ZHANG, Shaoyun CHEN. Experimental and Application Research of Novel Polyamine-Based CO₂ Absorbents in Gas-Fired Power Plants[J]. Power Generation Technology, 2025, 46(2): 304-313.

Figures/Tables 12

References 35

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成分配比	命名
27% DEEA+1% PZ+2% MEA	DT01-1
25% DEEA+3% PZ+2% MEA	DT01-2
23% DEEA+5% PZ+2% MEA	DT01-3
21% DEEA+7% PZ+2% MEA	DT01-4
19% DEEA+9% PZ+2% MEA	DT01-5
24% BDA+1% MDEA+5% AMP	DT02-1
22% BDA+3% MDEA+5% AMP	DT02-2
20% BDA+5% MDEA+5% AMP	DT02-3
18% BDA+7% MDEA+5% AMP	DT02-4
16% BDA+9% MDEA+5% AMP	DT02-5

成分配比	命名
27% DEEA+1% PZ+2% MEA	DT01-1
25% DEEA+3% PZ+2% MEA	DT01-2
23% DEEA+5% PZ+2% MEA	DT01-3
21% DEEA+7% PZ+2% MEA	DT01-4
19% DEEA+9% PZ+2% MEA	DT01-5
24% BDA+1% MDEA+5% AMP	DT02-1
22% BDA+3% MDEA+5% AMP	DT02-2
20% BDA+5% MDEA+5% AMP	DT02-3
18% BDA+7% MDEA+5% AMP	DT02-4
16% BDA+9% MDEA+5% AMP	DT02-5

参数	DT01-5	DT02-3
烟气流量/(m³/h)	2 500	2 890
洗涤塔入口烟气CO₂体积分数/%	4.42	4.45
洗涤塔入口烟气温度/℃	<110.0	<110.0
洗涤塔入口烟气压力/kPa	3.0~5.0	3.0~5.0
吸收塔入口烟气温度/℃	40±2	40±2
吸收塔出口烟气温度/℃	50±2	50±2
再沸器低压蒸汽流量/(kg/h)	350	362
再沸器低压蒸汽压力/MPa	0.4	0.4
再沸器低压蒸汽温度/℃	150	150
吸收剂质量分数/%	30	30
吸收剂循环流量/(m³/h)	5.0	4.0
再生塔操作压力/kPa	10	10
再生塔底温度/℃	103	104

参数	DT01-5	DT02-3
烟气流量/(m³/h)	2 500	2 890
洗涤塔入口烟气CO₂体积分数/%	4.42	4.45
洗涤塔入口烟气温度/℃	<110.0	<110.0
洗涤塔入口烟气压力/kPa	3.0~5.0	3.0~5.0
吸收塔入口烟气温度/℃	40±2	40±2
吸收塔出口烟气温度/℃	50±2	50±2
再沸器低压蒸汽流量/(kg/h)	350	362
再沸器低压蒸汽压力/MPa	0.4	0.4
再沸器低压蒸汽温度/℃	150	150
吸收剂质量分数/%	30	30
吸收剂循环流量/(m³/h)	5.0	4.0
再生塔操作压力/kPa	10	10
再生塔底温度/℃	103	104

参数	DT01-5	DT02-3	MEA
捕集率/%	91.42	90.60	90.10
捕集量/(kg/h)	185.18	221.10	218.90
蒸汽消耗/[kg/kg CO₂)]	1.78	1.61	2.65
再生热耗/[GJ/(t CO₂)]	3.65	3.29	5.44
电耗/[kW∙h/(t CO₂)]	88.14	81.97	97.75
除盐水耗/[t/(t CO₂)]	0.320	0.334	0.510
吸收剂消耗/[kg/(t CO₂)]	1.21	0.95	1.93
冷却水用量/[t/(t CO₂)]	198	210	247

Experimental and Application Research of Novel Polyamine-Based CO₂ Absorbents in Gas-Fired Power Plants

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References 35

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项目	单位成本	运行成本/元
项目	单位成本	DT01-5	DT02-3	MEA
合计		327.77	291.52	442.65
蒸汽	107.58元/t	191.49	173.20	285.09
电力	0.604元/(kW∙h)	53.24	49.51	59.03
除盐水	23.68元/t	7.58	7.91	12.08
循环冷却水	0.10元/t	19.81	21.01	24.69
吸收剂	DT01-5：4.6万元/t DT02-3：4.2万元/t MEA：3.2万元/t	55.66	39.9	61.76

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