A high adsorption capacity bamboo biochar for CO2 capture for low temperature heat utilization
A high adsorption capacity bamboo biochar for CO2 capture for low temperature heat utilization
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DOI：
10.1016/j.seppur.2022.121131
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发表时间：
2022-04-25
影响因子：
8.6
通讯作者：
Jiang, L.
中科院分区：
文献类型：
--
作者：
Ji, Y.;Zhang, C.;Jiang, L.
由于二氧化碳（CO2）排放的迅速增长，吸附燃烧后捕集技术获得了发展势头。具有优异性能的高性价比吸附剂越来越受到人们的关注。因此，一种新的KOH活化的生物质衍生的活性炭，即BBC-KOH，开发和研究方面的质地性质，吸附/脱附温度，脱附热和循环稳定性。通过对一个太阳能辅助燃煤发电厂与变温吸附工艺的技术经济评价，评价了其在实际应用中的潜在优势。结果表明，BBC-KOH可以表现出优异的吸附容量（在25 ℃下为1.50 mmol中心点g- 1）和低的解吸温度（在70 ℃下为1.42 mmol中心点g- 1），并且可以在80 ℃下完全解吸，即1.54 mmol中心点g- 1。与使用单乙醇胺和聚乙烯亚胺/二氧化硅的太阳能辅助燃煤电厂系统相比，使用BBC-KOH的系统的碳排放强度、平准化电力成本和CO2去除成本始终表现出最佳性能，分别对应于93.22 g中心点kWh-1、59.19 USD中心点MWh-1和14.12 USD中心点吨CO2 -1。结果表明，BBC-KOH具有投资少、再生温度低、吸附能力强等优点，是一种很有潜力的碳捕集技术。
Due to burgeoning carbon dioxide (CO2) emission, adsorption post-combustion capture technology gathers momentum. Cost-effective adsorbents with prominent performance draw more attention. Thus, a novel KOH activation biomass-derived activated carbon, i.e. BBC-KOH, is developed and investigated in terms of textural properties, adsorption/desorption temperatures, desorption heat and cyclic stability. A techno-economic assessment of a solar-assisted coal-fired power plant integrated with temperature swing adsorption process is conducted to evaluate potential merits in a practical application. Results demonstrate that BBC-KOH could perform an excellent adsorption capacity (1.50 mmol center dot g- 1 at 25 degrees C) with a low desorption temperature (1.42 mmol center dot g- 1 at 70 degrees C) and could be desorbed completely at 80 degrees C, i.e. 1.54 mmol center dot g- 1. Compared with solar-assisted coal-fired power plant systems using monoethanolamine and polyethyleneimine/silica, carbon emission intensity, levelized cost of electricity and cost of CO2 removed of the system using BBC-KOH always show the best performance, corresponding to 93.22 g center dot kWh-1, 59.19 USD center dot MWh-1 and 14.12 USD center dot tonCO2-1 , respectively. It reveals that BBC-KOH may be a potential solution to carbon capture with low capital cost, low regeneration temperature and excellent adsorption capacity.