Advances in mesoporous material for adsorption and photoconversion of CO2 in environmental pollution: Clean environment and clean energy

The world today is witnessing a new technological revolution, particularly in the area of new materials. Different types of materials often have different characteristics and uses. Mesoporous materials have a large specific surface area, easily modifiable inner and outer surfaces, tunable pore size and pore channels, and good biocompatibility and thermodynamic stability, thus emerging as a new candidate material in the chemical research community. The presence of mesopores facilitates the rapid diffusion of macromolecules, reduces resistance to mass transfer, and provides different properties depending on the pore size, making mesoporous materials a potential candidate for a wide range of applications. This paper reviews the recent methods used to synthesize mesoporous materials, including hydrothermal synthesis, microwave synthesis, the sol−gel method, the phase conversion method, and the templating method. The soft templating method is introduced in detail, including bulk self-assembly, solvent evaporation-induced self-assembly, solution-based nanoprecipitation, interfacial self-assembly in a solution, and emulsion template self-assembly. The current status of the processes related to mesoporous materials in the fields of biomedicine, environmental and energy, electrochemical energy storage, and gas separation is elaborated. Finally, the technical issues and future directions in the synthesis and application of mesoporous materials are briefly discussed.

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Section: Synthesis Methods For Mesoporous Materialsmentioning

confidence: 99%

Section: Synthesis Methods For Mesoporous Materialsmentioning

confidence: 99%

Synthesis and Application of Mesoporous Materials: Process Status, Technical Problems, and Development Prospects: A Mini-Review

Liu

Wang

et al. 2023

Energy Fuels

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“…SEM images in general indicate granular surfaces with different pore sizes due to the liberation of volatile organic compounds [15], The pore structure is one of the factors that determines the performance and quality of the adsorbent [21] and this in turn depends on the raw material used, since the chemical composition varies according to the precursor, where the precursors rich in carbon are of main interest for the synthesis of high-yield adsorbents [22][23][24].…”

Section: ) Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Preliminary Studies of Arsenic Adsorption Using Activated Carbons Synthetized from Kagneckia Lanceolata and Passiflora Ligularis

2024

IJESD

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Arsenic is a chemical element that is found in freshwater in volcanic areas or because of activities like mining. It is a toxic element that can cause diseases like cancer, if taken in high amounts. The South of Peru is a volcanic region with intensive mining activity, and several governmental studies have reported arsenic in various rivers that supply water for the local population. Conventional arsenic removal techniques, such as reverse osmosis, can be very costly, making it necessary to study new, efficient and low-cost arsenic removal methods. The present study seeks to analyze the efficiency of activated carbons synthesized from Passiflora Ligularis (PL) shells and from a plant native to the Peruvian Andes, Kageneckia lanceolata (KL), at removing As from water by adsorption. The iodine number of these carbons were 964.39 and 962.13 mg/g, respectively. Images taken using scanning electron microscopy (SEM) corroborate how porous these new adsorbents are. In addition, it appears the adsorption equilibrium best fits the Langmuir model, with an adsorption capacity (Q max) of 5.07 mg/g for Passiflora ligularis (PL) and 4.51 mg/g for Kageneckia lanceolata (KL). The results show these new eco-friendly and low-cost adsorbents have great potential as As removing agents, and their performance can be improved with a treatment to give them As adsorption specificity.

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“…Absorption, adsorption and photoconversion of CO 2 (Fadillah & Saleh, 2022;Saleh, 2022aSaleh, , 2022b, membrane, chemical looping, and geothermal and biochemical technologies are currently one of the most effective techniques for reducing CO 2 emissions. Different approaches available for carbon dioxide capture include post-combustion, precombustion and oxy-fuel approaches (D'Alessandro et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…It was reported that for conventional absorbents like MEA to absorb CO 2 from flue gas in power plants would increase the cost of investment by 60% for lower net energy output of the plant and capital investment cost where the reduction of cost with promising solvent combinations like CESAR-1 was not considerable as well (Manzolini et al, 2015). Any modification in the efficiency of any step of the method will reduce the estimated costs where different technologies have been studied for CO2 capture (Fadillah & Saleh, 2022;Saleh, 2022aSaleh, , 2022b.…”

Section: Introductionmentioning

confidence: 99%

Optimization of carbon dioxide absorption in a continuous bubble column reactor using response surface methodology

Derakhshandeh

Ün

2023

Environmental Quality Mgmt

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Carbon dioxide absorption using amine based solvents is a well‐known approach for carbon dioxide removal. Especially with the increasing concerns about greenhouse gas emissions, there is a need for an optimization approach capable of multifactor calibration and prediction of interactions. Since conventional methods based on empirical relations are not efficiently applicable, this study investigates use of Response Surface Methodology as a strong optimization tool. A bubble column reactor was used and the effect of solvent concentration (10.0, 20.0 and 30.0 vol%), flow rate (4.0, 5.0 and 6.0 L min−1), diffuser pore size (0.5, 1.0 and 1.5 mm) and temperature (20.0, 25.0 and 30.0°C) on the absorption capacity and also overall mass transfer coefficient was evaluated. The optimization results for maintaining maximum capacity and overall mass transfer coefficient revealed that different optimization targets led to different tuned operational factors. Overall mass transfer coefficient decreased to 34.7 min−1 when the maximum capacity was the desired target. High reaction rate along with the highest absorption capacity was set as desirable two factor target in this application. As a result, a third scenario was designed to maximize both mass transfer coefficient and absorption capacity simultaneously. The optimized condition was achieved when a gas flow rate of 5.9 L min−1, MEA solution of 29.6 vol%, diffuser pore size of 0.5 mm and temperature of 20.6°C was adjusted. At this condition, mass transfer coefficient reached a maximum of 38.4 min−1, with a forecasted achievable absorption capacity of 120.5 g CO2 per kg MEA.

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Advances in mesoporous material for adsorption and photoconversion of CO2 in environmental pollution: Clean environment and clean energy

Cited by 12 publications

References 74 publications

Synthesis and Application of Mesoporous Materials: Process Status, Technical Problems, and Development Prospects: A Mini-Review

Synthesis and Application of Mesoporous Materials: Process Status, Technical Problems, and Development Prospects: A Mini-Review

Preliminary Studies of Arsenic Adsorption Using Activated Carbons Synthetized from Kagneckia Lanceolata and Passiflora Ligularis

Optimization of carbon dioxide absorption in a continuous bubble column reactor using response surface methodology

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