High CO2 adsorption by amino-modified bio-spherical cellulose nanofibres aerogels

Liu, Shuang; Zhang, Yang; Hua, Jiang; Wang, Xiaoyu; Zhang, Tianmeng; Yao, Yuan

doi:10.1007/s10311-017-0701-8

Cited by 60 publications

(19 citation statements)

References 53 publications

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“…Furthermore, the sorbents are then regenerated by applying heat or water to release the CO 2 for storage or utilization. There are mainly two processes by which sorbents work: first through absorption, where the CO 2 dissolves in the sorbent material, typically using liquid sorbents such as potassium hydroxide or sodium hydroxide; second through adsorption, whereby the CO 2 adheres to the sorbent, typically using solid materials such as amines (Pires 2019;GNASL 2018;Gambhir and Tavoni 2019;Liu et al 2018). Both processes require thermal energy to regenerate the sorbent and release the CO 2 ; however, it is important to note that less energy is required under the adsorption route (Gambhir and Tavoni 2019).…”

Section: Direct Air Carbon Capture and Storagementioning

confidence: 99%

Strategies for mitigation of climate change: a review

et al. 2020

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Climate change is defined as the shift in climate patterns mainly caused by greenhouse gas emissions from natural systems and human activities. So far, anthropogenic activities have caused about 1.0 °C of global warming above the pre-industrial level and this is likely to reach 1.5 °C between 2030 and 2052 if the current emission rates persist. In 2018, the world encountered 315 cases of natural disasters which are mainly related to the climate. Approximately 68.5 million people were affected, and economic losses amounted to $131.7 billion, of which storms, floods, wildfires and droughts accounted for approximately 93%. Economic losses attributed to wildfires in 2018 alone are almost equal to the collective losses from wildfires incurred over the past decade, which is quite alarming. Furthermore, food, water, health, ecosystem, human habitat and infrastructure have been identified as the most vulnerable sectors under climate attack. In 2015, the Paris agreement was introduced with the main objective of limiting global temperature increase to 2 °C by 2100 and pursuing efforts to limit the increase to 1.5 °C. This article reviews the main strategies for climate change abatement, namely conventional mitigation, negative emissions and radiative forcing geoengineering. Conventional mitigation technologies focus on reducing fossil-based CO2 emissions. Negative emissions technologies are aiming to capture and sequester atmospheric carbon to reduce carbon dioxide levels. Finally, geoengineering techniques of radiative forcing alter the earth’s radiative energy budget to stabilize or reduce global temperatures. It is evident that conventional mitigation efforts alone are not sufficient to meet the targets stipulated by the Paris agreement; therefore, the utilization of alternative routes appears inevitable. While various technologies presented may still be at an early stage of development, biogenic-based sequestration techniques are to a certain extent mature and can be deployed immediately.

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Section: Direct Air Carbon Capture and Storagementioning

confidence: 99%

Strategies for mitigation of climate change: a review

et al. 2020

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“…As the time increased, more dye was removed by the Industrial celluloseg-poly(vinyl acetate). As the colour of the graft copolymer changed to green with dye removal, a chemical modification must have taken place leading to colour change in the dye [2,12,14]. This is collaborated by the fact that the graft copolymer got more closely packed molecules indicating that the dye had some chemical effect on the graft copolymer.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Vinyl Acetate Grafted onto Industrial Cellulose

Ekwunife¹,

Ajiwe²,

Odidika³

et al. 2020

SJC

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This study was aimed at investigating the synthesis and characterization of vinyl acetate grafted on Industrial Cellulose. Vinyl acetate monomer was grafted onto Industrial cellulose using benzoyl peroxide as initiator at varied temperatures. The Industrial cellulose-g-poly(vinyl acetate) was orange in colour. The effect of initiator concentration, monomer concentration and temperature on percentage grafting and grafting efficiency of the product was determined. Both percentage grafting and grafting efficiency increased with initiator concentration and monomer concentration for the industrial cellulose-g-poly(vinyl acetate). The percentage grafting and grafting efficiency increased with temperature from 60°C-70°C then decreased after 70°C for the sample. The graft copolymer was analyzed and characterized using various tests, which included Fourier transformed infrared spectrophotometer, physico-mechanical tests which were, hardness test with durometer shore hardness tester, density with Monsanto Densitron 2000, softening point tester with HDT/Vicat Test Station. Moreover, adsorption studies of bromothymol blue onto the sample was done with Ultraviolet-visible spectrophotometer. The results of the FTIR confirmed the presence of O-H of alcohol (3404 cm-1), C=O of esters (1645 cm-1), N-H of protein (2272 cm-1), C-H of methyl and methylene (2933 cm-1), and CO of esters (1122 cm-1) in the Industrial cellulose-g-poly(vinyl acetate). The result of the hardness showed that the Industrial cellulose-g-poly(vinyl acetate) was 87D, the density was 0.95mg/m 3 , and the softening point was 115°C-135°C. The percentage of bromothymol blue removed from aqueous solution was 72.4% for industrial cellulose-g-poly(vinyl acetate). The rate constants for the Industrial graft copolymer was determined using pseudo first order kinetics and it gave 3.59 x 10-2 min-1. The research showed that Industrial cellulose-g-poly(Vinyl acetate) could be used in the adsorption of bromothymol blue (dye) in aqueous solution.

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“…Phalimide modified CNF were studied with different loading of amino groups resulting in adsorption values of 5.20 mmol/g [204]. CNF were aminated achieving a high CO2 adsorption capacity of 1.78 mmol/g as well as good regeneration reported above 10 cycles [205]. The amine loading of 9.02 mmol/g resulted in the CO2 uptake of 1.02 and 0.35 mmol/g at 25 °C and 15 kPa by chemical and physical interactions, respectively [206].…”

Section: Functionalization As a Tool To Enhance The Properties Of Ligmentioning

confidence: 99%

Biorefinery Approach for Aerogels

et al. 2020

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According to the International Energy Agency, biorefinery is “the sustainable processing of biomass into a spectrum of marketable bio-based products (chemicals, materials) and bioenergy (fuels, power, heat)”. In this review, we survey how the biorefinery approach can be applied to highly porous and nanostructured materials, namely aerogels. Historically, aerogels were first developed using inorganic matter. Subsequently, synthetic polymers were also employed. At the beginning of the 21st century, new aerogels were created based on biomass. Which sources of biomass can be used to make aerogels and how? This review answers these questions, paying special attention to bio-aerogels’ environmental and biomedical applications. The article is a result of fruitful exchanges in the frame of the European project COST Action “CA 18125 AERoGELS: Advanced Engineering and Research of aeroGels for Environment and Life Sciences”.

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High CO2 adsorption by amino-modified bio-spherical cellulose nanofibres aerogels

Cited by 60 publications

References 53 publications

Strategies for mitigation of climate change: a review

Strategies for mitigation of climate change: a review

Synthesis and Characterization of Vinyl Acetate Grafted onto Industrial Cellulose

Biorefinery Approach for Aerogels

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