Plastic/rubber waste-templated carbide slag pellets for regenerable CO2 capture at elevated temperature

Sun, Jian; Sun, Yu; Yang, Yuandong; Tong, Xianliang; Liu, Wenqiang

doi:10.1016/j.apenergy.2019.03.165

Cited by 121 publications

(33 citation statements)

References 48 publications

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“…In addition, the Z i of Ac‐CaO was always higher than that of CaO during the process, which demonstrates the positive effect of acetic acid modification on CaO for CO 2 capture in the coupled system. The CO 2 capture capacities of the CaO‐based materials exhibited apparent decay with the number of carbonation/calcination cycles owing to sintering 36 . During the coupled CO 2 capture and CaO/Ca(OH) 2 tests, the Ac‐CaO and CaO with low CO 2 capture activity were reactivated by the cyclic THS cycles.…”

Section: Resultsmentioning

confidence: 99%

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Sun

Yan

et al. 2020

Greenhouse Gases

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CaO/Ca(OH) 2 thermochemical heat storage (THS) technology is considered to be one of the most promising technologies for large-scale solar energy storage. However, the THS performance of raw CaO-based materials decreases during multiple cycles. In this work, CaO derived from calcium acetate (Ac-CaO) is prepared and applied to a coupled system that achieved simultaneous CaO/Ca(OH) 2 THS and CO 2 capture. The CO 2 capture and THS performances of Ac-CaO are always higher than those of calcined limestone owing to the preferable pore structure, whereas Ac-CaO exhibits decreasing CO 2 capture and THS performance resulting from sintering and the formation of CaCO 3 from CaO or Ca(OH) 2 with ambient CO 2 during air cooling, respectively. In the coupled CaO/Ca(OH) 2 THS and CO 2 capture system, Ac-CaO is subjected to 10 CO 2 capture cycles, 30 THS cycles, 1 CO 2 capture cycle, 10 THS cycles, 1 CO 2 capture cycle, and 10 THS cycles sequentially. The hydration and dehydration conversions of Ac-CaO in the 31st THS cycle reach 91.7 and 93.6%, respectively, which are 1.6 and 1.6 times higher than those recorded prior to the 11th CO 2 capture cycle owing to the decomposition of CaCO 3 during calcination. The carbonation conversion of Ac-CaO achieves 89.9% in the 11th CO 2 capture cycle, which is 22.3% higher than that recorded prior to the 10 THS cycles owing to reactivation from the hydration process during THS. The CO 2 capture and CaO/Ca(OH) 2 THS processes are enhanced in the coupled system using Ac-CaO; therefore, the coupled system appears promising for CaO/Ca(OH) 2 THS and CO 2 capture.

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Section: Resultsmentioning

confidence: 99%

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Sun

Yan

et al. 2020

Greenhouse Gases

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“…If limestone and calcium‐based waste could be combined as a CO 2 adsorbent, it not only could realize the resource‐based utilization of calcium‐based waste and reduce environmental pollution caused by accumulation and land waste but reduce the cost of CO 2 capture, forming a new process route combining CO 2 capture and recycling of calcium‐based waste. It is necessary for these CaO‐based materials to be pelletized from view of industrial application, and some scholars had investigated the pelletization of adsorbents 36–38 . However, it is feasible to comprehensively explore the influence mechanism of the molding aids such as binders and peptizers on the adsorption performance and the fluidized attrition characteristics of the pellets.…”

Section: Introductionmentioning

confidence: 99%

Pelletization and attrition of CaO‐based adsorbent for CO₂ capture

Zhang

Jiang

Yaseen

et al. 2021

Asia-Pacific J Chem Eng

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CaO‐based adsorbent pellets from limestone and carbide slag powder were prepared by an extrusion–spheronization method. Three types of binder and peptizer materials were introduced to improve the adsorption performance and mechanical properties of adsorbent pellets. Weibull statistics was employed to analyze the compressive stress of adsorbent pellets. The results revealed that pseudo‐boehmite and nitric acid were the favorable choice of binder and peptizer for preparing CaO‐based adsorbent pellets with enhanced chemical and mechanical properties. The addition of pseudo‐boehmite (PB) improved the pore distribution characteristics by increasing the pores within 10–100 nm, and the addition of nitric acid brought favorable mechanical reliability by providing a large amount of H+, thereby interacting with multiple PB particles to form a network structure. It was shown that when 3 wt.% pseudo‐boehmite and 15 wt.% nitric acid were used, the favorable performance of the molding pellets could be obtained (carbonation conversion: 36%, compressive stress: 25.3 MPa; attrition rate: 0.46 wt.%/hr), which had promising prospects for practical CO2 removal.

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“…Plastic-based composites have also been investigated as a way to reduce plastic usage and introduce new functions [ 21 , 22 ]. For example, wood–plastic composites [ 23 ] possess the durability of plastic and the biomass performance of wood; plastic–rubber composites [ 24 ] improve the rigidity of plastic; plastic–carbon fiber composites [ 25 ] modify the brittleness of plastic. Bamboo charcoal (BC) is a pyrolysis of solids from bamboo or bamboo residues with a highly porous structure that is suited for a wide variety of applications, including water purification, architectural decoration, daily chemicals, and the food industry [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Adsorptive Properties of Foamed EVA-Modified Polypropylene/Bamboo Charcoal Composites

Zhang

Huang

et al. 2021

Materials

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Due to its excellent adsorption and humidity control function, bamboo charcoal (BC) has often been mixed with polypropylene (PP) to produce PP/BC composites for interior paneling applications. However, due to the poor foaming quality of PP, PP/BC composites suffer as a result of their high density, which limits their scope of use. Here, to improve its foaming quality, PP was modified with ethylene vinyl acetate (EVA), and then the EVA-modified PP (E-PP) was mixed with different contents of BC (0 wt.%–50 wt.%), as well as foaming agent (Azodicarbonamide, AC) and its auxiliaries (ZnO, Znst), in a twin-screw extruder, followed by hot-pressing at high temperature to obtain foamed E-PP/BC composites. The resulting composites showed good porosity and pore distribution with an increase of BC content by up to 20%. Further increase in the BC content seemed to cause the foaming performance to decrease significantly. The product density and adsorption rate increased, while the mechanical strength decreased with increasing BC content. At a BC content of 40 wt.%, the foamed E-PP/BC composite showed the best combined performance, with a density of 0.90 g/cm3, 24-h formaldehyde adsorption rate of 0.48, and bending strength of 11.59 MPa.

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Plastic/rubber waste-templated carbide slag pellets for regenerable CO2 capture at elevated temperature

Cited by 121 publications

References 48 publications

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Pelletization and attrition of CaO‐based adsorbent for CO₂ capture

Mechanical and Adsorptive Properties of Foamed EVA-Modified Polypropylene/Bamboo Charcoal Composites

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Plastic/rubber waste-templated carbide slag pellets for regenerable CO2 capture at elevated temperature

Cited by 121 publications

References 48 publications

Coupled CO2 capture and thermochemical heat storage of CaO derived from calcium acetate

Coupled CO2 capture and thermochemical heat storage of CaO derived from calcium acetate

Pelletization and attrition of CaO‐based adsorbent for CO2 capture

Mechanical and Adsorptive Properties of Foamed EVA-Modified Polypropylene/Bamboo Charcoal Composites

Contact Info

Product

Resources

About

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Pelletization and attrition of CaO‐based adsorbent for CO₂ capture