通过工业上可行的活化工艺，使用从棉秆作物残渣中制备的多孔碳来中试规模捕获烟道气中的二氧化碳,Industrial & Engineering Chemistry Research

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通过工业上可行的活化工艺，使用从棉秆作物残渣中制备的多孔碳来中试规模捕获烟道气中的二氧化碳
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-02-29 , DOI: 10.1021/acs.iecr.3c04117
Vineet Kumar ₁ , Mayur Bhalani ₁ , Jigar Andharia ₁ , Partha Pratim Mondal ₁ , Pratyush Maiti ₁ , Subhadip Neogi ₁ , Subarna Maiti ₁

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为了从烟气中捕获CO _{2 ，通过热化学方法从丰富的非饲料作物残渣——棉秆中提取多孔碳。}该前体采用化学计量比例的化学活化剂（NaOH 和 K ₂ SO ₄）的新组合进行处理，并通过一步活化转化为多孔碳。由于制造成本大幅下降，在多孔碳生产中使用这种组合代替传统的 KOH 活化提供了一个有吸引力的工业机会。对衍生碳进行了广泛的表征，包括 XRD、XPS、拉曼光谱、SEM 和 TEM。77 K 下的氮吸附-解吸等温线分析显示，BET 比表面积为 1797 m ² /g，CO ₂吸收能力在 273 K、298 和 313 K 下分别为 4.77、2.49 和 1.71 mmol/g。_{此外，利用烟气（11±0.2%CO 2}和89±0.2%N ₂ ）研究了固定床柱在不同流量和温度下CO ₂吸附的穿透曲线，分析了固定床柱的平衡CO ₂容量。动态条件下的多孔吸附剂。作为这一概念的证明，将多孔碳填充在柱筒中，并研究了中试规模柴油锅炉排出的烟气中CO _{2的吸附。}这表明碳滤筒可以有效且实用地去除烟气中的CO _{2 ，特别是在小规模工业应用中。}

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CO2 Capture from Flue Gas on a Pilot Scale Using Porous Carbon Prepared from Cotton Stalk Crop Residues through an Industrially Viable Activation Process

With the aim to capture CO₂ from flue gas, porous carbon was derived from abundantly available, nonfodder crop residue─cotton stalk via thermochemical methodology. The precursor was treated with a new combination of chemical activating agents (NaOH and K₂SO₄) in stoichiometric proportions and converted to porous carbon via a single-step activation. The transition to using this combination in place of the conventional KOH activation in the production of porous carbon offers an attractive industrial opportunity, due to the substantial drop in the cost of manufacturing. Extensive characterizations were performed on the derived carbon, which included XRD, XPS, Raman spectra, SEM, and TEM. Nitrogen adsorption–desorption isotherm analysis at 77 K revealed BET-specific surface areas of 1797 m²/g, along with CO₂ uptake capacities of 4.77, 2.49, and 1.71 mmol/g at 273, 298, and 313 K, respectively. Furthermore, the breakthrough curve of CO₂ adsorption in a fixed-bed column was studied at different flow rates and temperatures using the flue gas (11 ± 0.2% CO₂ and 89 ± 0.2% N₂) to analyze the equilibrium CO₂ capacity of the porous adsorbent in dynamic conditions. As proof of the concept, the porous carbon was packed in a column cartridge and the adsorption of CO₂ from flue gas emanating from a pilot-scale diesel-fired boiler was studied. This demonstrated that carbon cartridges can efficiently and practically remove CO₂ from flue gas, especially in small-scale industrial applications.

更新日期：2024-02-29

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