The development of adsorption-based technologies for CO₂ capture in the postcombustion processes requires finding materials with high capacity of adsorption and low cost of preparation. In this study, the modification of a commercial activated carbon (Norit ROX 0.8), considered as a solid adsorbent for CO₂ capture, and the effects of different methods of activations, chemically (hydrogen peroxide, sulfuric acid, nitric acid, and urea) and thermally (at 800 °C) on adsorption performance, have been investigated. Then, CO₂ adsorption capacity was studied at different temperatures and pressures to evaluate the effects of various agents on sample performance. The textural properties of the samples were determined using adsorption–desorption isotherms of nitrogen at −196 °C. Finally, the obtained data were modeled by Response Surface Methodology (RSM) and Langmuir isotherm. The results showed that the prepared sample by successive treatments with nitric acid, urea, and thermal calcination has a higher uptake capacity than other modified samples.

中文翻译：

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使用突破性测量方法，在化学和热改性活性炭中捕获CO ₂：实验和模型研究

后燃烧过程中基于吸附的CO ₂捕集技术的发展要求寻找具有高吸附能力和低制备成本的材料。在这项研究中，对商业活性炭（Norit ROX 0.8）进行了改性，该活性炭被认为是用于捕获CO ₂的固体吸附剂，并且对不同活化方法的化学作用（过氧化氢，硫酸，硝酸和尿素）产生了影响。并研究了热（在800°C下）对吸附性能的影响。然后，CO ₂在不同温度和压力下研究了吸附能力，以评估各种试剂对样品性能的影响。样品的织构性质是通过在-196°C下氮气的吸附-解吸等温线确定的。最后，通过响应面方法（RSM）和Langmuir等温线对获得的数据进行建模。结果表明，通过硝酸，尿素和热煅烧的连续处理所制备的样品具有比其他改性样品更高的吸收能力。