O-containing hyper-cross-linked polymers and porous carbons for CO 2 capture

Liu, Mingqiang; Shao, Lishu; Huang, Jianhan; Liu, You-Nian

doi:10.1016/j.micromeso.2017.12.036

Cited by 55 publications

(31 citation statements)

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“…It has been reported that V micro is an important factor that determines CO 2 uptake; especially, the micropores with 2–3 times the pore size of the diameter of CO 2 molecules (0.33 nm) would maximally enhance the adsorption potential. 34 , 47 , 54 , 60 Then, V micro ( d < 1.0 nm) was linearly fitted with the CO 2 uptake, and the correlation coefficient ( R 2 ) was 0.8352 (at 273 K and 1 bar), 0.7239 (at 273 K and 0.15 bar), and 0.7580 (at 298 K and 1 bar), implying that V micro ( d < 1.0 nm) had an evident positive effect on CO 2 uptake, and the results were also in accordance with some previous reports. 47 , 54 , 60 Meanwhile, the importance of the ultramicropores with d < 0.7 nm has been pointed out in some recent references.…”

Section: Resultsmentioning

confidence: 99%

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Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO₂ Capture

et al. 2020

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Biomass-derived porous carbons are one kind of sustainable, extensive, and flexible carbon material for CO 2 capture. Here, we prepared several microporous carbons from poplar wood by three preparation routes. Especially, the residues of the poplar wood after the bioethanol process were explored as precursors to prepare activated carbon by KOH and ZnCl 2 activation. By the adjustment of the preparation routes and the optimization of the activation conditions, these porous carbons exhibited diversified morphology (sponge, nanosheets, and honeycomb structure), tunable porosity (specific surface areas: 511–2153 m 2 /g), and narrow micropore distribution (0.55–1.2 nm). These carbons had a high CO 2 uptake of up to 217 mg/g at 273 K and 1 bar, which was comparable with those of many N-doped porous carbons, and possessed moderate isosteric heat of CO 2 adsorption (21.1–43.2 kJ/mol), good cyclic ability, and high CO 2 /N 2 selectivity (Henry’s law: 44.0). The results indicated that CO 2 uptake of these carbons was mainly decided by their micropore volume ( d < 1.0 nm) at 273 K and 1 bar. This work provides an important reference for preparing promising CO 2 adsorbents with tunable structures from similar biomass resources.

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Section: Resultsmentioning

confidence: 99%

“…The results suggested that the O doping may not be effective enough at improving CO 2 capture under the dominant effect of microporosity, and previous references also showed similar results. 52 , 54 …”

Section: Resultsmentioning

confidence: 99%

Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO₂ Capture

et al. 2020

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“…HCLPs 9–12 possess smaller SSAs than other HCLPs, indicating the HCLPs synthesized from 1‐methylnaphthalene have larger SSAs than those from naphth‐1‐ol ( Table 2 ). The polymers synthesized using naphth‐2‐ol and DMM via external cross‐linker knitting method (ECL KM) have also large SSAs up to 355 m 2 g −1 , indicating that SSAs are affected by the position of OH group on naphthalene ring.…”

Section: Resultsmentioning

confidence: 99%

Investigation on Naphthalene and Its Derivatives‐Based Microporous Organic Hyper‐Cross‐Linked Polymers via Different Methodologies

Teng

Wei

Yang

et al. 2020

Macro Chemistry & Physics

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A series of cost‐effective hyper‐cross‐linked polymers (HCLPs) are synthesized from naphthalene via the external cross‐linker (ECL) knitting method, the solvent knitting method, and the Scholl coupling reaction, respectively. According to multiple characterizations, the resulting polymers are thermally stable and fluorescent with large specific surface areas (SSAs) and narrow pore distributions. In particular the HCLP synthesized using dimethoxymethane as the ECL exhibits SSAs up to 2870 m2 g−1 and shows a great potential in gas adsorption applications. Naphthol and 1‐methylnaphthalene are used as monomers to synthesize HCLPs by the above three methods to investigate whether introducing functional groups to naphthalene would improve properties of the resulting polymers. Moreover, HCLPs feature high SSAs, outstanding thermal and fluorescent performances, and facile synthesis, making them promising candidates for industrial applications.

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“…And CO 2 uptake on hyperporous carbon sharply linearly increased at 273 and 298 K, the adsorption capacities reached to 22.51 wt% (273 K/1.0 bar) and 11.93 wt% (298 K/1.0 bar), respectively, which is attributed to abundant micropores in hyperporous carbon networks. Although the adsorption capacity of 22.51 wt% (273 K/1.0 bar) was not the highest one on porous carbons derived from hypercrosslinked polymers, the uptake value is higher than these of porous carbons derived based hypercrosslinked polymers, such as NPC‐800‐KOH(15.8 wt%) 19a. To comprehend the adsorption properties of porous carbon for carbon dioxide well, the isosteric enthalpies ( Q st ) of porous carbon was then calculated from the adsorption isotherm at 273 and 298 K by Clausius–Clapeyron equation as shown in Figure S3 in the Supporting Information, this value was displayed as 22.66 KJ mol −1 .…”

Section: Resultsmentioning

confidence: 99%

Hyperporous Carbon from Triptycene‐Based Hypercrosslinked Polymer for Iodine Capture

Zhang

Zhai

Zhen

et al. 2019

Adv Materials Inter

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for removing iodine because of their porous structure, such as metal-organic frameworks (MOFs) [4] and porous organic polymers (POPs). [5] Although most of these organic or metallic hybrid materials have good chemical and thermal stability, they will inevitably be partially oxidized or carbonized under long-term high-temperature and oxidizing atmosphere in the process of iodine vapor capture. Comparatively speaking, hyperporous carbons by high-temperature pyrolysis are noted for their high surface areas, large pore volumes, and good chemical and thermal stability, and they may be promising adsorbents for iodine capture. [6] Hyperporous carbons can be prepared from various precursors including porous materials including MOFs and POPs and show good performance in the fields of gas storage, catalysts, and energy storage. [7][8][9] While, many of the porous precursors involved costly starting materials or expensive catalysts or rigorous reaction conditions for their preparation, which limit their large-scale applications. [10][11][12] Among POPs, hypercrosslinked polymers (HCPs) have obvious advantages of low cost and easy scalization. [13] However, such hyperporous carbons with high surface area and excellent chemical and thermal stability from HCPs precursors have not been reported in the field of iodine capture until now. Recently, we synthesized triptycene-based hypercrosslinked porous poly mer sponge (THPS) with superior adsorption capacities for organic solvents and dyes. [14] Herein, we further used THPS as precursor to prepared hyperporous carbon for iodine capture. Interestingly, the obtained hyperporous carbon (THPS-C) processes high surface area and large pore volume, and displays excellent adsorption ability for iodine vapor. Results and DiscussionThe hyperporous carbon THPS-C was prepared by treating THPS (Scheme 1) at 800 °C for 2 h under argon atmosphere using KOH as chemical activating agent in a mass ratio of 1:4 according to literature methods. [6a,8c] Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and highresolution transmission electron microscopy (HR-TEM) were utilized to confirm the structure and morphology of THPS-C. As shown in Figure 1a,b, THPS-C was composed of substantial irregular sphere particles. HR-TEM image revealed abundant micropores in THPS-C networks (Figure S1, Supporting Considering the nuclear fuel reprocessing conditions at 75 °C and the oxidizability of iodine, thermal and chemical stabilities are especially important for porous materials to enrich iodine. However, most organic or metal coordinated porous materials hardly meet this long-term demand. Here, highly porous carbon is prepared from pyrolysis at high temperature using triptycene-based hypercrosslinked polymer as precursor, and possesses high Brunauer-Emmett-Teller (BET) surface area of 3125 m 2 g −1 and pore volume of 1.60 cm 3 g −1 , and exhibits excellent iodine uptake ability of 340 wt% at 75 °C. Moreover, the obtained hyperporous carbon also displays remarkable capture efficiency of...

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O-containing hyper-cross-linked polymers and porous carbons for CO 2 capture

Cited by 55 publications

References 55 publications

Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO₂ Capture

Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO₂ Capture

Investigation on Naphthalene and Its Derivatives‐Based Microporous Organic Hyper‐Cross‐Linked Polymers via Different Methodologies

Hyperporous Carbon from Triptycene‐Based Hypercrosslinked Polymer for Iodine Capture

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O-containing hyper-cross-linked polymers and porous carbons for CO 2 capture

Cited by 55 publications

References 55 publications

Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO2 Capture

Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO2 Capture

Investigation on Naphthalene and Its Derivatives‐Based Microporous Organic Hyper‐Cross‐Linked Polymers via Different Methodologies

Hyperporous Carbon from Triptycene‐Based Hypercrosslinked Polymer for Iodine Capture

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Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO₂ Capture

Selectable Microporous Carbons Derived from Poplar Wood by Three Preparation Routes for CO₂ Capture