Self-Activating Approach for Synthesis of 2,6-Naphthalene Disulfonate Acid Disodium Salt-Derived Porous Carbon and CO₂ Capture Performance

Abstract

Porous carbon is considered an effective adsorbent for CO2 uptake thanks to its high textural feature, tunable surface decoration, and stable chemical/physical characteristics. Herein, a one-pot self-activating synthesis approach has been introduced to fabricate disodium 2,6-naphthalene disulfonate (NDS)-derived self-S-doped porous carbon. With this method, there is no external chemical activating agents for the activation process, and the self-activating process occurs by releasing CO, H2O, and CO2 gases during pyrolysis treatment. It was found that activating temperatures can carefully control the porous textural and elemental compositions of the as-prepared carbons. Upon the activating process, the optimal S-doped porous carbon was prepared at 700 °C, providing CO2 uptake capacities of 2.36 and 3.56 mmol/g at 25 and 0 °C and 1 bar, respectively. An in-depth investigation indicates that the joint effect of narrow microporosity and S content determines the CO2 uptake for this series of carbons. In addition, these NDS-derived self-S-doped porous carbons exhibit moderate CO2 heats of adsorption, fast adsorption kinetics, reasonable CO2/N2 selectivities, good dynamic CO2 capture capacities, and stable recyclabilities. The presented synthesis method is promising for fabricating facile carbon-based adsorbents from various organic precursors.

Cycling of potassium–carbonate co-substituted hydroxyapatite compositions for improved carbon dioxide capture at 500 °C

“…14,15,41 Disruption caused by the coronavirus pandemic meant that it was not possible to determine the textural characteristics of the apatite material over these cycles, a key limitation of this study as a sorbents viability for carbon capture is often very dependent on these features. 42–44…”

“…14,15,41 Disruption caused by the coronavirus pandemic meant that it was not possible to determine the textural characteristics of the apatite material over these cycles, a key limitation of this study as a sorbents viability for carbon capture is often very dependent on these features. [42][43][44] The carbonate content of the material as-prepared and at each interval over the 15 cycles is shown in Fig. 4 alongside the calculated CO 2 carrying capacity.…”

Processing Plastic Wastes into Value-Added Carbon Adsorbents by Sulfur-Based Solvothermal Synthesis

“…The dynamic adsorption data provided clear evidence that plastic-based carbon had quite high adsorption selectivity for CO 2 among carbon materials. Regeneration stability is very important for practical applications, − C@PPS and C@PPO showed good CO 2 adsorption cycle stability, and the adsorption capacity remained basically unchanged after six continuous adsorption–desorption cycles (Figure e,f).…”

Sulfur-Enriched Nanoporous Carbon: A Novel Approach to CO2 Adsorption

“…The enhanced porosity characteristic of SDC materials, frequently engendered via pyrolytic procedures, engenders supplementary location for the physisorption of CO 2 molecules, therein contributing substantively to an overarching amplification in the CO 2 uptake capacity. Mastery of the intricate nexus between sulfur doping, morphological porosity, and surface reactivity is of cardinal import, given its propensity to mold SDC materials in a manner that optimizes the efficiency of CO 2 capture . For this reason, the inquiry into the attributes of SDC materials emerges as a vanguard avenue within the ambit of CO 2 capture methodologies, bearing relevance in the amelioration of contemporary ecological exigencies.…”

“…Mastery of the intricate nexus between sulfur doping, morphological porosity, and surface reactivity is of cardinal import, given its propensity to mold SDC materials in a manner that optimizes the efficiency of CO 2 capture. 46 For this reason, the inquiry into the attributes of SDC materials emerges as a vanguard avenue within the ambit of CO 2 capture methodologies, bearing relevance in the amelioration of contemporary ecological exigencies. SDCs have been prepared by hightemperature pyrolysis using various sulfur-containing polymers as raw materials such as poly(styrene-divinylbenzene), 47 dipotassium anthraquinone-1,8 disulfonate, 48 poly(sodium 4styrenesulfonate), 49 thienyl-based polymer, 35 and poly(ether ketone).…”