Pre‐Carbonization: An Efficient Route to Improve the Textural and Gas Sorption Properties of Nitrogen‐Enriched Nanoporous Polytriazine,ChemNanoMat

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Pre‐Carbonization: An Efficient Route to Improve the Textural and Gas Sorption Properties of Nitrogen‐Enriched Nanoporous Polytriazine
ChemNanoMat ( IF 2.6 ) Pub Date : 2019-11-26 , DOI: 10.1002/cnma.201900582
Monika Chaudhary ₁ , Paritosh Mohanty ₁

Affiliation

An unprecedented approach to improve the CO₂ capture capacity by heating nitrogen enriched nanoporous polytriazine (NENP‐1) below the carbonization (pre‐carbonization) temperature has been invented. The NENP‐1 heated at 350 °C for 2 h (assigned as NENP‐1‐350) in argon atmosphere has improved specific surface area (SA_BET) marginally from 840 (NENP‐1) to 880 m² g⁻¹ (NENP‐1‐350). However, there was a substantial increase in the CO₂ capture capacity from 22.9 (NENP‐1) to 33.8 wt% (NENP‐1‐350) measured at 0 °C and 1 bar. Although, both the specimens have comparable SA_BET, the NENP‐1‐350 has larger pore volume of 1.10 cm³ g⁻¹ (as compared to 0.71 cm³ g⁻¹ in NENP‐1) and larger pore size distribution (PSD) along with the higher isosteric heat of adsorption that contributed for such a high CO₂ capture capacity. Unlike the CO₂ capture capacity in the NENP‐1‐350, there was only marginal increase in the hydrogen storage capacity from 2.30 to 2.47 wt% and methane sorption capacity from 1.8 to 1.9 wt% measured at −196 and 0 °C, respectively, as compared to the NENP‐1.

中文翻译：

预碳化：提高富氮纳米多孔聚三嗪的质构和气体吸附性能的有效途径

发明了一种前所未有的方法，可以通过在碳化（预碳化）温度以下加热富含氮的纳米多孔聚三嗪（NENP-1）来提高CO _2的捕集能力。在氩气气氛中在350°C下加热2小时的NENP-1（指定为NENP-1-350）的比表面积（SA _BET）从840（NENP-1）略微提高到880 m ² g ^-1（NENP -1-350）。但是，在0°C和1 bar下测得的CO ₂捕集能力从22.9（NENP-1）大幅增加到33.8 wt％（NENP-1-350）。尽管两个样品的SA _BET值均相当，但NENP-1-350的孔体积更大，为1.10 cm ³ g ^-1（与NENP-1中的0.71 cm ³ g ^-1相比）和较大的孔径分布（PSD），以及更高的等规吸附热，可实现如此高的CO ₂捕集能力。与NENP-1-350中的CO ₂捕集能力不同，分别在-196和0°C下测得的储氢量从2.30 wt％略微增加到2.47 wt％，甲烷吸附量从1.8 wt％增加到1.9 wt％。，与NENP-1相比。

更新日期：2019-11-26

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