CO2 capture by amine-enriched fly ash carbon sorbents

Gray, McMahan L.; Soong, Yee; Champagne, Kenneth J; Baltrus, John P.; Stevens, Robert W.; Toochinda, Pisanu; Chuang, Steven S. C.

doi:10.1016/s1383-5866(03)00113-8

Cited by 209 publications

(127 citation statements)

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“…mesopores) decreased about 9 % than the original carbon and accompanied with a large increase in the micropore volume. Urea treatment carbon, a number of complex reactions taking place between the carbon and the urea involves a number of complex reactions under heat treatment [19,21].The textural changes depend among other factors on the oxidizing agent or post treatment used. It was reported that the liquid phase oxidation does not notably change the texture of the activated carbon [3,11,22].…”

Section: Textural Propertiesmentioning

confidence: 99%

Removal of Cationic Neutral Red Dye from Aqueous Solutions using Natural and Modified Rice Straw

et al. 2017

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MODIFIED colloidal carbons were prepared by reacting colloidal carbon obtained from rice straw with thermal oxidation, nitric acid and urea treatment. The textural and chemistry characteristics of the surface of non-modified and modified carbons were obtained from nitrogen adsorption at -196 o C, elemental analysis and fourier transform infrared (FTIR) techniques. The uptake of cationic neutral red (NR) dye from aqueous solutions by these carbons was determined by kinetic and equilibrium experiments. The surface area and the total pore volume decreased, whereas the pore radius increased after the treatment with nitric acid.The surface pH of un-modified carbon was basic while those of modified carbons were acidic.Urea treated carbons with the lowest acidic character and high nitrogen content presented the lowest NR dye uptake capacity. The maximum removal of NR dye was obtained at a pH of 4.The amount of adsorption by the investigated carbons was found to depend on the amount of surface acidity. The adsorption results were analyzed considering Langmuir, Freundlich and Dubinin-Radushkevich(D-R) models. The adsorption of NR dye onto the assessed adsorbents is of the physical sorption type following pseudo -first -order kinetic.Nitric acid modification brought about a significant rise in NR dye adsorption which was ascribed to the formation of oxygen containing acidic groups on the surface of adsorbent.The equilibrium adsorption data of NR dye were well fitted with Langmuir and D-R models.

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Section: Textural Propertiesmentioning

confidence: 99%

Removal of Cationic Neutral Red Dye from Aqueous Solutions using Natural and Modified Rice Straw

et al. 2017

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“…The nitrogen-enriched activated carbon, denoted as CPHCL, was prepared in a way similar way to that as previously reported (Gray et al, 2004), mixing 10 g of activated carbon with 500mL of 10 -1 M 3-chloropropylamine hydrochloride solution. The mixture was kept under constant stirring, at ambient temperature for 5 hours.…”

Section: Selection and Preparation Of Adsorbentsmentioning

confidence: 99%

“…It has been suggested that primary amine can react with the activated carbon surface, forming surface complexes with the presence of NH 2 surface groups (Gray et al, 2004). Bands were presence at 3365 and 1607 cm -1 , ascribed to asymmetric stretching (NH 2 ) and NH 2 deformation, respectively, and at 3303 cm -1 .…”

Section: Commercialmentioning

confidence: 99%

Separation of Carbon Dioxide from Flue Gas Using Adsorption on Porous Solids

Dantas¹,

Rodrigues²,

Moreira³

2012

Greenhouse Gases - Capturing, Utilization and Reduction

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“…The basic surface of carbon materials ensures a good adsorption for CO 2 since CO 2 is a weak Lewis acid (electron acceptor) that can interact with electron donors, such as nitrogen surface groups. Recently, basic nitrogen groups have been incorporated onto AC frameworks for enhancing CO 2 adsorption (Gray et al, 2004;Plaza et al, 2009;Plaza et al, 2011). Nitrogen-containing functionalities can be introduced in the carbon matrix via a reaction with nitrogen-containing reagents (i.e., NH 3 , urea, and amines) or the preparation of a carbon from a nitrogen-containing precursor (i.e., carbazole, melamine, acridine) (Stoeckli et al, 1996;Lopez et al, 2000;Carrott et al, 2001;Plaza et al, 2011;Plaza et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Nitrogen-Doped Activated Carbon for Carbon Dioxide Adsorption

Chen

Peng

Lin

et al. 2014

Aerosol Air Qual. Res.

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Nitrogen-doped activated carbons with high surface areas obtained from resorcinol and formaldehyde resins were evaluated as CO 2 adsorbents in a simulated flue gas stream under anhydrous and humid conditions. These carbons were prepared using two approaches, namely ammonia treatment without nitric acid pre-oxidation and amination after preoxidation. The pre-oxidation of activated carbons considerably enhanced the nitrogen incorporation during the amination process. The amination temperature affects the content and type of nitrogen incorporated onto the carbon surface, as determined by X-ray photoelectron spectroscopy, which enhances the specific adsorbent-adsorbate interaction for CO 2 in humid conditions. The presence of H 2 O in the feed gas significantly decreased CO 2 adsorption for a very low nitrogen content of virgin activated carbon. A sample prepared via the amination of pre-oxidized carbon at 700°C (NORF700) exhibited excellent tolerance to moisture and the highest CO 2 capacity of 2.10 mmol/g in a 7% CO 2 /83% N 2 /10% H 2 O wet stream at 50°C and 130 kPa. The high performance of NORF700 was ascribed to its high surface area, adequate micropore volume, and high amounts of pyrindinic-like and pyrrole-like nitrogen species. The results indicate that nitric acid preoxidation followed by ammonia treatment at 700°C is an appropriate process for preparing adsorbents for CO 2 separation in post-combustion applications.

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CO2 capture by amine-enriched fly ash carbon sorbents

Cited by 209 publications

References 1 publication

Removal of Cationic Neutral Red Dye from Aqueous Solutions using Natural and Modified Rice Straw

Removal of Cationic Neutral Red Dye from Aqueous Solutions using Natural and Modified Rice Straw

Separation of Carbon Dioxide from Flue Gas Using Adsorption on Porous Solids

Facile Preparation of Nitrogen-Doped Activated Carbon for Carbon Dioxide Adsorption

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