Nitrogen-rich hyper-crosslinked polymers for low-pressure CO2 capture
Nitrogen-rich hyper-crosslinked polymers for low-pressure CO2 capture
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DOI：
10.1016/j.cej.2017.11.106
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发表时间：
2018-02-15
影响因子：
15.1
通讯作者：
Manovic, Vasilije
中科院分区：
文献类型：
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作者：
Fayemiwo, Kehinde A.;Vladisavljevic, Goran T.;Manovic, Vasilije
合成了一系列具有高亲CO2性的聚[甲基丙烯酰胺-co-（乙二醇二甲基丙烯酸酯）]（聚（MAAM-co-EGDMA））多孔聚合物颗粒，称为HCP-MAAM，用于CO2捕集。具有从0.3至0.9的MAAM-至-EGDMA摩尔比的聚合物固有地富含氮，并且在低压下对选择性CO2捕获表现出高亲和力。一个技术经济模型的基础上，580 MWel超临界燃煤电厂的情况下，开发的合成吸附剂的性能进行评估。使用傅里叶变换红外（FTIR）光谱和X-射线光电子能谱（XPS）测定聚合物网络内的NH 2部分的存在和密度。热重分析（TGA）结果表明，聚合物在515-532 K范围内具有良好的热稳定性.在273 K时，最大CO2吸附量为1.56 mmol/g，吸附热为28-35 kJ/mol。在聚合物网络内的酰胺基团的密度的增加导致在低压下对CO2的更高的亲和力。在CO2：N2-比为15：85时，273 K下1 bar时的CO2/N2-选择性为52，超低CO2分压时达到104。技术经济分析表明，改造的HCP-MAAM为基础的CO2捕获系统，导致净能源罚款7.7-8.0%（HHV）点，这是明显低于MEA或冷冻氨洗涤捕获系统的报告。比热要求上级于大多数常规溶剂如MDEA-PZ和K2 CO 3。重要的是，发现HCP-MAAM改造方案的经济性能与化学溶剂洗涤方案具有竞争力。
A series of poly[methacrylamide-co-(ethylene glycol dimethacrylate)] (poly(MAAM-co-EGDMA)) porous polymeric particles with high CO2-philicity, referred to as HCP-MAAMs, were synthesised for CO2 capture. The polymers with a MAAM-to-EGDMA molar ratio from 0.3 to 0.9 were inherently nitrogen-enriched and exhibited a high affinity towards selective CO2 capture at low pressures. A techno-economic model based on a 580 MWel supercritical coal-fired power plant scenario was developed to evaluate the performance of the synthesised adsorbents. The presence and density of NH2 moieties within the polymer network were determined using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The thermogravimetric analysis (TGA) showed that the polymers were thermally stable up to 515-532 K. The maximum CO2 adsorption capacity at 273 K was 1.56 mmol/g and the isosteric heat of adsorption was 28-35 kJ/mol. An increase in the density of amide groups within the polymer network resulted in a higher affinity towards CO2 at low pressure. At a CO2:N-2 ratio of 15:85, CO2/N-2 selectivity at 273 K was 52 at 1 bar and reached 104 at ultra-low CO2 partial pressure. The techno-economic analysis revealed that retrofitting a HCP-MAAM-based CO2 capture system led to a net energy penalty of 7.7-8.0%(HHV) points, which was noticeably lower than that reported for MEA or chilled ammonia scrubbing capture systems. The specific heat requirement was superior to the majority of conventional solvents such as MDEA-PZ and K2CO3. Importantly, the economic performance of the HCP-MAAM retrofit scenario was found to be competitive to chemical solvent scrubbing scenarios.