Carbon dioxide capture in biochar produced from pine sawdust and paper mill sludge: Effect of porous structure and surface chemistry

Igalavithana, Avanthi Deshani; Choi, Seung Wan; Shang, Jin; Hanif, Aamir; Dissanayake, Pavani Dulanja; Tsang, Daniel C.W.; Kwon, Jung Hwan; Lee, Ki Bong; Ok, Yong Sik

doi:10.1016/j.scitotenv.2020.139845

Cited by 103 publications

(48 citation statements)

References 60 publications

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“…The deconvoluted C1s and O1s spectra of the respective precursors and the SCG-and CH-derived biochars at 300 °C for 1 h are shown in Figure 5a,b, and the variation in content obtained from the survey scan is presented in Tables S1 and S2. Azargohar et al 30 suggested that the C1s spectra contain the following functional groups in the carbon matrix: peak (I) for aromatic/aliphatic sp 2 carbon (C−C/CC/C−CH x ) observed at BE = 284.1−284.7 eV, peak (II) for sp 3 The trend of increasing −C−C/CC/C−H x confirmed the increment in aromatic content and disintegration of aliphatic groups. On the contrary, the hydroxyl, carbonyl, and ester functional groups reduced with torrefaction harshness.…”

Section: Resultsmentioning

confidence: 96%

“…The post-combustion CO 2 capture units are considered as one of the feasible solutions to reduce CO 2 emissions. , The post-combustion method involves capturing CO 2 from the mixed flue gas stream after the complete combustion. Compared to other existing CO 2 capture technologies (pre-combustion or oxy-fuel combustion), post-combustion capture can be retrofitted to the existing industries without significant modifications. , In addition, the post-combustion method is easy to set up and is also a cost-effective CO 2 capture technology.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Modeling Studies of Torrefaction of Spent Coffee Grounds and Coffee Husk: Effects on Surface Chemistry and Carbon Dioxide Capture Performance

et al. 2021

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Torrefaction of biomass is a promising thermochemical pretreatment technique used to upgrade the properties of biomass to produce solid fuel with improved fuel properties. A comparative study of the effects of torrefaction temperatures (200, 250, and 300 °C) and residence times (0.5 and 1 h) on the quality of torrefied biomass samples derived from spent coffee grounds (SCG) and coffee husk (CH) were conducted. An increase in torrefaction temperature (200–300 °C) and residence time (0.5–1 h) for CH led to an improvement in the fixed carbon content (17.9–31.8 wt %), calorific value (18.3–25 MJ/kg), and carbon content (48.5–61.2 wt %). Similarly, the fixed carbon content, calorific value, and carbon content of SCG rose by 14.6–29 wt %, 22.3–30.3 MJ/kg, and 50–69.5 wt %, respectively, with increasing temperature and residence time. Moreover, torrefaction led to an improvement in the hydrophobicity and specific surface area of CH and SCG. The H/C and O/C atomic ratios for both CH- and SCG-derived torrefied biomass samples were in the range of 0.93–1.0 and 0.19–0.20, respectively. Moreover, a significant increase in volatile compound yield was observed at temperatures between 250 and 300 °C. Maximum volatile compound yields of 11.9 and 6.2 wt % were obtained for CH and SCG, respectively. A comprehensive torrefaction model for CH and SCG developed in Aspen Plus provided information on the mass and energy flows and the overall process energy efficiency. Based on the modeling results, it was observed that with increasing torrefaction temperature to 300 °C, the mass and energy yield values of the torrefied biomass samples declined remarkably (97.3% at 250 °C to 67.5% at 300 °C for CH and 96.7% at 250 °C to 75.1% at 300 °C for SCG). The SCG-derived torrefied biomass tested for CO 2 adsorption at 25 °C had a comparatively higher adsorption capacity of 0.38 mmol/g owing to its better textural characteristics. SCG would need further thermal treatment or functionalization to tailor the surface properties to attract more CO 2 molecules under a typical post-combustion scenario.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Experimental and Modeling Studies of Torrefaction of Spent Coffee Grounds and Coffee Husk: Effects on Surface Chemistry and Carbon Dioxide Capture Performance

et al. 2021

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“…In CCS systems, the operation of CO 2 capture is still the most expensive process, accounting for over 50% of the total CCS cost . Precombustion, postcombustion, and oxy-fuel combustion are the three main approaches for capturing CO 2 from industrial emission point sources, with postcombustion capture being the most cost-effective method. , However, owing to the low CO 2 concentration in postcombustion flue gases (typically <15%), the main challenge of this process is the development of a cost-effective CO 2 capture method. Well-established absorption processes, such as the regenerative amine solution process, for postcombustion CO 2 capture are expensive and have problems of significant corrosion, solvent loss due to degradation, and environmental toxicity .…”

Section: Introductionmentioning

confidence: 99%

Applied Machine Learning for Prediction of CO₂ Adsorption on Biomass Waste-Derived Porous Carbons

Yuan

Suvarna

Low

et al. 2021

Environ. Sci. Technol.

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181

108

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Biomass waste-derived porous carbons (BWDPCs) are a class of complex materials that are widely used in sustainable waste management and carbon capture. However, their diverse textural properties, the presence of various functional groups, and the varied temperatures and pressures to which they are subjected during CO 2 adsorption make it challenging to understand the underlying mechanism of CO 2 adsorption. Here, we compiled a data set including 527 data points collected from peer-reviewed publications and applied machine learning to systematically map CO 2 adsorption as a function of the textural and compositional properties of BWDPCs and adsorption parameters. Various tree-based models were devised, where the gradient boosting decision trees (GBDTs) had the best predictive performance with R 2 of 0.98 and 0.84 on the training and test data, respectively. Further, the BWDPCs in the compiled data set were classified into regular porous carbons (RPCs) and heteroatom-doped porous carbons (HDPCs), where again the GBDT model had R 2 of 0.99 and 0.98 on the training and 0.86 and 0.79 on the test data for the RPCs and HDPCs, respectively. Feature importance revealed the significance of adsorption parameters, textural properties, and compositional properties in the order of precedence for BWDPC-based CO 2 adsorption, effectively guiding the synthesis of porous carbons for CO 2 adsorption applications.

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“…Finally, it was concluded that rice husk and sugarcane bagasse biochar can be reused in concrete without adverse environmental effects. In addition, studies have shown that using biochar to replace cement can reduce greenhouse gas emissions in the construction industry [4,6,12,13].…”

Section: Introductionmentioning

confidence: 99%

An Insight into the Effect of Rice Straw Biochar on Compressive Strength and Thermal Conductivity of Cement

Zhang

Han

Wang

et al. 2022

J. Phys.: Conf. Ser.

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It is well known that is very important to improve the quality of cement material concerning its compressive strength and thermal conductivity, which may reduce its quantity of usage and improve the heat maintenance of a structure compared with the traditional cement. In order to improve the properties of cement and other building materials, the test pieces were prepared by incorporating rice straw biochar with different pyrolysis temperatures into cement paste, and the compressive strength and thermal conductivity were tested after curing under both wet and dry conditions. The results showed that with the increase of biochar incorporation, the strength and thermal conductivity of the test blocks were decreased, but the thermal insulation performance of them was increased, and the quality and density of the test block were reduced. Under the condition of wet curing, the strength of the test pieces enhanced greatly with the dosage of 1% and 5%. When the dosage was 1%, the strength of the wet curing test block was the highest, which was increased by 51.06% compared with the blank control. The block strength increased by 14.98%; the thermal conductivity of the test piece incorporating biochar was reduced, and the test piece with 10% of the dry curing showed better thermal insulation performance, and the thermal conductivity was reduced by 39.21%. It can be seen that the addition of biochar improves the strength of the test block and optimizes the thermal insulation performance of the cement.

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Carbon dioxide capture in biochar produced from pine sawdust and paper mill sludge: Effect of porous structure and surface chemistry

Cited by 103 publications

References 60 publications

Experimental and Modeling Studies of Torrefaction of Spent Coffee Grounds and Coffee Husk: Effects on Surface Chemistry and Carbon Dioxide Capture Performance

Experimental and Modeling Studies of Torrefaction of Spent Coffee Grounds and Coffee Husk: Effects on Surface Chemistry and Carbon Dioxide Capture Performance

Applied Machine Learning for Prediction of CO₂ Adsorption on Biomass Waste-Derived Porous Carbons

An Insight into the Effect of Rice Straw Biochar on Compressive Strength and Thermal Conductivity of Cement

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Carbon dioxide capture in biochar produced from pine sawdust and paper mill sludge: Effect of porous structure and surface chemistry

Cited by 103 publications

References 60 publications

Experimental and Modeling Studies of Torrefaction of Spent Coffee Grounds and Coffee Husk: Effects on Surface Chemistry and Carbon Dioxide Capture Performance

Experimental and Modeling Studies of Torrefaction of Spent Coffee Grounds and Coffee Husk: Effects on Surface Chemistry and Carbon Dioxide Capture Performance

Applied Machine Learning for Prediction of CO2 Adsorption on Biomass Waste-Derived Porous Carbons

An Insight into the Effect of Rice Straw Biochar on Compressive Strength and Thermal Conductivity of Cement

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Product

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About

Applied Machine Learning for Prediction of CO₂ Adsorption on Biomass Waste-Derived Porous Carbons