Carbon Dioxide Adsorption Using High Surface Area Activated Carbons from Local Coals Modified by KOH, NaOH and ZnCl2 Agents

Toprak, Atakan; Kopaç, Türkan

doi:10.1515/ijcre-2016-0042

Cited by 36 publications

(22 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NCC expose more internal structure, the specific surface areas of the material are increased, the oxygen-containing functional groups on the surface are reduced, and the hydrophobicity are increased, so the adsorption capacity of NCC is improved than RCC. The results of this study are similar with the study of Toprak [22].…”

Section: Specific Surface Areasupporting

confidence: 91%

Effect of surface modification on quinoline adsorption onto coking coal

Xu¹,

Wang²,

Qin³

et al. 2019

Desalination and Water Treatment

View full text Add to dashboard Cite

The adsorption of quinoline from simulated wastewater by raw coking coal (RCC), HCl modified coking coal (HCC) and NaOH modified coking coal (NCC) are investigated. Effects of initial concentration, adsorbent dosage, adsorption time and temperature for quinoline adsorption on coking coal are studied in batch experiments. The adsorption efficiency for quinoline increase with increasing of adsorbent dosage and adsorption time, the optimum adsorbent dosage is 50 g•L-1 , the adsorption time for quinoline adsorption on RCC, HCC and NCC is 120 mins. Kinetic experiments show that the equilibrium time for quinoline adsorption on raw and modified coking coal is 120 mins, and follow quasi-second order kinetic equation well. The adsorption isotherm data fit Freundlich models, and the adsorption capacity of quinoline on the three adsorbents increase with increasing of temperature from 288 to 313 K. HCC and NCC have a higher adsorption capacity of quinoline than RCC, because modification treatment can improve the specific surface area of RCC. Thermodynamic parameters, the Gibbs free energy change (ΔG°), Enthalpy change (ΔH°) and Entropy change (ΔS°) are calculated and the results show that the adsorption of quinoline on three adsorbents is spontaneous and endothermic. The results illustrate that modified coking coal have high potential as low-cost adsorbent for quinoline removal.

show abstract

Section: Specific Surface Areasupporting

confidence: 91%

Effect of surface modification on quinoline adsorption onto coking coal

Xu¹,

Wang²,

Qin³

et al. 2019

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…The volume of micropores in the range of 0.33–0.82 nm of bamboo-derived ACs was the main factor responsible for the CO 2 adsorption at 273 K and 1 bar, while neither the surface area nor the total pore volume were significant factors 13 . In contrast, both the surface area and micropore volume played a crucial role on the CO 2 uptake by coconut shell-derived ACs 17 , local coal-derived AC activated by KOH 18 and corncob-derived AC activated by KOH 19 . A high CO 2 uptake of Mesua ferrea seed cake-derived AC was obtained when the AC had a high micropore quantity and surface functionality 20 .…”

Section: Introductionmentioning

confidence: 97%

Valorization of spent disposable wooden chopstick as the CO2 adsorbent for a CO2/H2 mixed gas purification

Koo‐Amornpattana

Jonglertjunya

Phadungbut

et al. 2022

Sci Rep

View full text Add to dashboard Cite

A series of activated carbons (ACs) derived from spent disposable wooden chopsticks was prepared via steam activation and used to separate carbon dioxide (CO2) from a CO2/hydrogen (H2) mixed gas at atmospheric pressure. A factorial design was employed to investigate the effects of the activation temperature and time as well as their interactions on the production yield of ACs and their CO2 adsorption capacity. The activation temperature exhibited a much higher impact on both the production yield and the CO2 adsorption capacity of ACs than the activation time. The interaction of both parameters did not significantly affect the yield of ACs, but did affect the CO2 adsorption capacity. The optimal preparation condition provided ACs with a desirable yield of around 23.18% and a CO2 adsorption capacity of 85.19 mg/g at 25 °C and 1 atm and consumed the total energy of 225.28 MJ/kg AC or 116.4 MJ/g-mol CO2. A H2 purity of greater than 96.8 mol% was achieved from a mixed gas with low CO2 concentration (< 20 mol%) during the first 3 min of adsorption and likewise around 90 mol% from a mixed gas with a high CO2 concentration (> 30 mol%) during the first 2 min. The CO2 adsorption on the as-prepared ACs proceeded dominantly via multilayer physical adsorption and was affected by both the surface area and micropore volume of the ACs. The adsorption capacity was diminished by around 18% after six adsorption/desorption cycles. The regeneration of the as-prepared chopstick-derived ACs can be easily performed via heating at a low temperature and ambient pressure, suggesting their potential application in the temperature swing adsorption process.

show abstract

“…A reasonable CO 2 loading of 1.3 mmol/g was determined for the produced porous fibre [ 18 ]. The production of activated carbon by treating coal with KOH was carried out by chemical activation and an increased CO 2 loading of 9.09 mmol/g was achieved [ 19 ]. The CO 2 activated porous carbon has been synthesized from biomass-based on olive residues [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

CO2 Capture by Low-Cost Date Pits-Based Activated Carbon and Silica Gel

2021

View full text Add to dashboard Cite

The rising levels of CO2 in the atmosphere are causing escalating average global temperatures. The capture of CO2 by adsorption has been carried out using silica gel type III and prepared activated carbon. The date pits-based activated carbon was synthesized using a tubular furnace by physical activation. The temperature of the sample was increased at 10 °C/min and the biomass was carbonized under N2 flow maintained continuously for 2 h at 600 °C. The activation was performed with the CO2 flow maintained constantly for 2 h at 600 °C. The temperature, feed flow and adsorbate volume were the parameters considered for CO2 adsorption. The success of CO2 capture was analyzed by CO2 uptake, efficiency based on column capacity, utilization factors and the mass transfer zone. The massively steep profiles of the breakthrough response of the AC demonstrate the satisfactory exploitation of CO2 uptake under the conditions of the breakthrough. The SG contributed to a maximal CO2 uptake of 8.61 mg/g at 298 K and Co = 5% with F = 5 lpm. The enhanced CO2 uptake of 73.1 mg/g was achieved with a column efficiency of 0.94 for the activated carbon produced from date pits at 298 K. The AC demonstrated an improved performance with a decreased mass transfer zone of 1.20 cm with an enhanced utilization factor f = 0.97 at 298 K. This finding suggests that a date pits-based activated carbon is suitable for CO2 separation by adsorption from the feed mixture.

show abstract

Carbon Dioxide Adsorption Using High Surface Area Activated Carbons from Local Coals Modified by KOH, NaOH and ZnCl2 Agents

Cited by 36 publications

References 42 publications

Effect of surface modification on quinoline adsorption onto coking coal

Effect of surface modification on quinoline adsorption onto coking coal

Valorization of spent disposable wooden chopstick as the CO2 adsorbent for a CO2/H2 mixed gas purification

CO2 Capture by Low-Cost Date Pits-Based Activated Carbon and Silica Gel

Contact Info

Product

Resources

About