scholarly journals Oxygen and nitrogen enriched pectin-derived micro-meso porous carbon for CO2 uptake

RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 546-560
Author(s):  
Milad Vafaeinia ◽  
Mobin Safarzadeh Khosrowshahi ◽  
Hossein Mashhadimoslem ◽  
Hosein Banna Motejadded Emrooz ◽  
Ahad Ghaemi
Keyword(s):  
Porous Carbon ◽  
Co2 Uptake ◽  
Organic Precursors

Oxygen and nitrogen enriched micro–meso porous carbon powders have been prepared from pectin and melamine as oxygen and nitrogen containing organic precursors, respectively.

scholarly journals Meso/Microporous Carbons from Conjugated Hyper-Crosslinked Polymers Based on Tetraphenylethene for High-Performance CO2 Capture and Supercapacitor

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 738
Author(s):  
Mohamed Gamal Mohamed ◽  
Mahmoud M. M. Ahmed ◽  
Wei-Ting Du ◽  
Shiao-Wei Kuo
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Total Pore Volume ◽  
Specific Area ◽  
High Specific Capacitance ◽  
Koh Activation ◽  
Co2 Uptake ◽  
Crosslinked Polymers ◽  
Good Thermal Stability ◽  
Porous Carbon Materials

In this study, we successfully synthesized two types of meso/microporous carbon materials through the carbonization and potassium hydroxide (KOH) activation for two different kinds of hyper-crosslinked polymers of TPE-CPOP1 and TPE-CPOP2, which were synthesized by using Friedel–Crafts reaction of tetraphenylethene (TPE) monomer with or without cyanuric chloride in the presence of AlCl3 as a catalyst. The resultant porous carbon materials exhibited the high specific area (up to 1100 m2 g−1), total pore volume, good thermal stability, and amorphous character based on thermogravimetric (TGA), N2 adsoprtion/desorption, and powder X-ray diffraction (PXRD) analyses. The as-prepared TPE-CPOP1 after thermal treatment at 800 °C (TPE-CPOP1-800) displayed excellent CO2 uptake performance (1.74 mmol g−1 at 298 K and 3.19 mmol g−1 at 273 K). Furthermore, this material possesses a high specific capacitance of 453 F g−1 at 5 mV s−1 comparable to others porous carbon materials with excellent columbic efficiencies for 10,000 cycle at 20 A g−1.

MICROWAVE ASSISTED K2CO3 PALM SHELL ACTIVATED CARBON AS SORBENT FOR CO2 ADSORPTION APPLICATION

2016 ◽  
Vol 78 (8-3) ◽  
Author(s):  
Usman Dadum Hamza ◽  
Noor Shawal Nasri ◽  
Nor Aishah Saidina Amin ◽  
Jibril Mohammed ◽  
Husna Mohd Zain
Keyword(s):  
Activated Carbon ◽  
Porous Carbon ◽  
Co2 Adsorption ◽  
Co2 Uptake ◽  
Adsorption Method ◽  
Equilibrium Data ◽  
Different Temperatures ◽  
Co2 Adsorption Capacity ◽  
Adsorption Equilibrium Data ◽  
Best Fit

Carbon dioxide is believed to be a major greenhouse gas (GHG) that contributes to global warming. In this study, palm shells were used as a precursor to prepare CO2 activated carbon sorbents via carbonization, chemical impregnation with K2CO3 and microwave activation.  Adsorption equilibrium data for CO2 adsorption on the porous carbon were obtained at different temperatures using static volumetric adsorption method. Langmuir, Freundlich, Sips and Toths models were used to correlate the experimental data. The CO2 adsorption capacity at 303.15, 343.15, 378.15 443.15 K and 1 bar on the sorbent was 2.71, 1.5, 0.77, 0.69 mmol/g respectively. Sips isotherm was found to have the best fit. The results indicated that the porous carbon sorbent prepared by carbonization and microwave K2CO3 assisted activation have good CO2 uptake. The porous carbons produced are therefore good candidates for CO2 adsorption applications

scholarly journals MWCNT Decorated Rich N-Doped Porous Carbon with Tunable Porosity for CO2 Capture

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3451
Author(s):  
Yuanjie Xiong ◽  
Yuan Wang ◽  
Housheng Jiang ◽  
Shaojun Yuan
Keyword(s):  
Co2 Capture ◽  
Porous Carbon ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Oxidation ◽  
Co2 Uptake ◽  
In Situ Chemical Oxidation ◽  
Pristine Mwcnts ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Designing of porous carbon system for CO2 uptake has attracted a plenty of interest due to the ever-increasing concerns about climate change and global warming. Herein, a novel N rich porous carbon is prepared by in-situ chemical oxidation polyaniline (PANI) on a surface of multi-walled carbon nanotubes (MWCNTs), and then activated with KOH. The porosity of such carbon materials can be tuned by rational introduction of MWCNTs, adjusting the amount of KOH, and controlling the pyrolysis temperature. The obtained M/P-0.1-600-2 adsorbent possesses a high surface area of 1017 m2 g−1 and a high N content of 3.11 at%. Such M/P-0.1-600-2 adsorbent delivers an enhanced CO2 capture capability of 2.63 mmol g−1 at 298.15 K and five bars, which is 14 times higher than that of pristine MWCNTs (0.18 mmol g−1). In addition, such M/P-0.1-600-2 adsorbent performs with a good stability, with almost no decay in a successive five adsorption-desorption cycles.

scholarly journals Green Self-Activating Synthesis System for Porous Carbons; Celery Biomass Wastes as a Typical Case for CO2 Uptake with Kinetic, Equilibrium and Thermodynamic Studies

2022 ◽  
Author(s):  
Mobin Safarzadeh Khowsroshahi ◽  
Hossein Mashhadimoslem ◽  
Hosein Banna Motejadded Emrooz ◽  
Ahad Ghaemi ◽  
Mahsa S Hosseini Naghavi
Keyword(s):  
Porous Carbon ◽  
Typical Case ◽  
Activation Process ◽  
Co2 Uptake ◽  
Order Kinetic ◽  
Porous Carbons ◽  
Synthesis System ◽  
Adsorption Enthalpy ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons

Abstract A green self-activating synthesis system (SASS) has been introduced for porous carbons. In the presented system, there is no external support for the activation process, and the activating agents are the circulating gases released during the pyrolysis treatment. As a typical case, this system was used for the synthesis of hierarchical porous carbons from celery wastes in hydroponic greenhouses. Based on the adsorption-desorption results, the optimal porous carbons were synthesized at 700°C, providing a surface area as high as 1126 m2g−1 and micropore volume of approximately 0.7 cm3g−1. X-ray photoelectron spectroscopy indicated the presence of graphitic nitrogen in the synthesized porous carbon structure. The synthesized porous carbons were applied as an adsorbent for CO2 capture. CO2 adsorption was performed at low and high pressures at various temperatures. Under low pressures (0-1 bar), the synthesized carbons adsorbed 5 mmolg−1 at 0°C and 2.03 mmolg−1 at 25°C. The adsorption capacity of the synthesized carbon at 25°C and a relatively high pressure of 9.5 bar was 9.57 mmolg−1. Based on the thermodynamic and kinetic models, it was clarified that the adsorption process can be regarded as physisorption with an adsorption enthalpy of 23.2 kJ.mol−1. Additionally, the fractional-order kinetic model was found to be the best match in the kinetic curves. The synthesis system described herein represents a promising strategy for producing green porous carbon from various waste organic precursors.

scholarly journals Understanding the self-templating of hierarchically porous carbon electrocatalysts using Group 2 coordination polymers

2020 ◽  
Vol 1 (1) ◽  
pp. 20-33 ◽  
Author(s):  
Eliyahu M. Farber ◽  
Kasinath Ojha ◽  
Tomer Y. Burshtein ◽  
Lihi Hasson ◽  
David Eisenberg
Keyword(s):  
Coordination Polymers ◽  
Porous Carbon ◽  
Carbon Materials ◽  
The Self ◽  
Hierarchically Porous ◽  
Hierarchical Porosity ◽  
Metal Organic ◽  
Organic Precursors ◽  
Group 2

Hierarchical porosity in carbon materials can be realized by self-templating: controlled pyrolysis of well-designed metal–organic precursors.

Highly Selective CO2 Uptake in Novel Fishnet-like Polybenzoxazine-Based Porous Carbon

2019 ◽  
Vol 33 (11) ◽  
pp. 11454-11464 ◽  
Author(s):  
Lin Hong ◽  
Shunlong Ju ◽  
Xiaoyun Liu ◽  
Qixin Zhuang ◽  
Guozhu Zhan ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Co2 Uptake

scholarly journals Carbonization and Preparation of Nitrogen-Doped Porous Carbon Materials from Zn-MOF and Its Applications

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 264 ◽  
Author(s):  
Kulandaivel Sivasankar ◽  
Souvik Pal ◽  
Murugan Thiruppathi ◽  
Chia-Her Lin
Keyword(s):  
Detection Limit ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Metal Organic Framework ◽  
Total Pore Volume ◽  
Electrochemical Sensing ◽  
Co2 Uptake ◽  
Nitrogen Doped ◽  
Metal Organic ◽  
Optimized Conditions

Nitrogen-doped porous carbon (NPC) materials were successfully synthesized via a Zn-containing metal-organic framework (Zn-MOF). The resulting NPC materials are characterized using various physicochemical techniques which indicated that the NPC materials obtained at different carbonization temperatures exhibited different properties. Pristine MOF morphology and pore size are retained after carbonization at particular temperatures (600 °C-NPC600 and 800 °C-NPC800). NPC800 material shows an excellent surface area 1192 m2/g, total pore volume 0.92 cm3/g and displays a higher CO2 uptake 4.71 mmol/g at 273 k and 1 bar. Furthermore, NPC600 material displays good electrochemical sensing towards H2O2. Under optimized conditions, our sensor exhibited a wide linearity range between 100 µM and 10 mM with a detection limit of 27.5 µM.

Ultrathin Carbon Nanosheets for Highly-efficient Capacitive K-ion and Zn-ion Storage

2020 ◽  
Author(s):  
Yamin Zhang ◽  
Zhongpu Wang ◽  
Deping Li ◽  
Qing Sun ◽  
Kangrong Lai ◽  
...  
Keyword(s):  
Energy Storage ◽  
Porous Carbon ◽  
Metal Ion ◽  
Rate Capability ◽  
Energy Storage Devices ◽  
Capacity Retention ◽  
Carbon Nanosheets ◽  
Storage Devices ◽  
High Efficient ◽  
Ion Storage

<p></p><p>Porous carbon has attracted extensive attentions as the electrode material for various energy storage devices considering its advantages like high theoretical capacitance/capacity, high conductivity, low cost and earth abundant inherence. However, there still exists some disadvantages limiting its further applications, such as the tedious fabrication process, limited metal-ion transport kinetics and undesired structure deformation at harsh electrochemical conditions. Herein, we report a facile strategy, with calcium gluconate firstly reported as the carbon source, to fabricate ultrathin porous carbon nanosheets. <a>The as-prepared Ca-900 electrode delivers excellent K-ion storage performance including high reversible capacity (430.7 mAh g<sup>-1</sup>), superior rate capability (154.8 mAh g<sup>-1</sup> at an ultrahigh current density of 5.0 A g<sup>-1</sup>) and ultra-stable long-term cycling stability (a high capacity retention ratio of ~81.2% after 4000 cycles at 1.0 A g<sup>-1</sup>). </a>Similarly, when being applied in Zn-ion capacitors, the Ca-900 electrode also exhibits an ultra-stable cycling performance with ~90.9% capacity retention after 4000 cycles at 1.0 A g<sup>-1</sup>, illuminating the applicable potentials. Moreover, the origin of the fast and smooth metal-ion storage is also revealed by carefully designed consecutive CV measurements. Overall, considering the facile preparation strategy, unique structure, application flexibility and in-depth mechanism investigations, this work will deepen the fundamental understandings and boost the commercialization of high-efficient energy storage devices like potassium-ion/sodium-ion batteries, zinc-ion batteries/capacitors and aluminum-ion batteries.</p><br><p></p>

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