Activated carbon surface modification by catalytic chemical vapor deposition of natural gas for enhancing adsorption of greenhouse gases

Rezvani, Hadi; Fatemi, Shohreh; Tamnanloo, Javad

doi:10.1016/j.jece.2019.103085

Cited by 15 publications

(3 citation statements)

References 28 publications

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“…Adsorption of gases using activated carbon materials was carried out extensively and the focus now shis also to zeolites. [126][127][128][129] Releasing carbon dioxide into the environment by electricity generation, industrial operations, and transportation leads to the cause of climate change. Hence, it should have captured before releasing it into the environment.…”

Section: Adsorptionmentioning

confidence: 99%

Recent advances in the synthesis and applications of mordenite zeolite – review

et al. 2021

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Section: Adsorptionmentioning

confidence: 99%

Recent advances in the synthesis and applications of mordenite zeolite – review

et al. 2021

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“…The excessive emissions of greenhouse gases into atmosphere after industrial revolution are considered as one of the main causes for global warming and other environmental effects. − Although the emission of fluorinated gases only accounts for ∼3% of the global emission of greenhouse gases, the global warming potential (GWP) values of such gases were typically 1000 times higher than CO 2 over the 100-year time horizon. − The global application of fluorinated gases of hydrochlorofluorocarbons (HCFCs) and chlorofluorocarbons (CFCs) as alternative refrigerants was regulated under Montreal Protocol as they can cause serious environmental problems such as ozone layer depletion and global warming. − The transformation of hydrochlorofluorocarbon (HCFCs) into more environmentally friendly hydrofluoroolefins (HFOs) is a sustainable way to produce value-added chemicals with low global warming potential (GWP), short lifetime, and zero ozone depletion potential. − For instance, vinylidene fluoride (VDF), an HFO product from the dehydrochlorination of HCFC-142b, has a GWP value of only 0.9 over the 100-year time horizon . VDF is a very useful monomer among many HFOs since it serves as the essential building block for the production of poly(vinylidene fluoride) (PVDF) .…”

Section: Introductionmentioning

confidence: 99%

One-Pot Cascade Catalysis of Dehydrochlorination of Greenhouse Gas HCFC-142b and Hydrochlorination of Acetylene for the Spontaneous Production of VDF and VCM

Wei

Zhou

et al. 2021

ACS EST Eng.

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Hydrochlorofluorocarbon (HCFC) has been widely applied as the third-generation refrigerant globally, however, the global warming potential of such gases is often 100 and 1000 times higher than that of CO 2 . Dehydrochlorination reaction offers an encouraging strategy to transform the high-global-warming-potential gases of hydrochlorofluorocarbons (HCFCs) to low-global-warming-potential gases of hydrofluoroolefins (HFOs). However, the handling of a large amount of byproduct HCl remains one of the major challenges blocking the industrialization of dehydrochlorination of HCFC-142a for the production of vinylidene fluoride (VDF). A one-pot cascade reaction combining dehydrochlorination of HCFC-142b and hydrochlorination of acetylene was first proposed to spontaneously produce valuable monomers of VDF and vinyl chloride monomer (VCM) while eliminating the tedious HCl treatment step. Both thermodynamic calculations and experimental results validate the feasibility of the cascade reaction. Five different heterogeneous catalysts were screened for the proposed cascade reaction, including monocomponent catalyst BaF 2 , NAC, bifunctional BaF 2 /NAC catalyst, and bicomponent BaF 2 -NAC-S and BaF 2 -NAC-M catalysts. Among them, the mixed BaF 2 -NAC-M catalyst demonstrated the best catalytic performance, with BaF 2 mainly acting as the dehydrochlorination site and NAC mainly acting as the hydrochlorination site. The corresponding reaction mechanism was also proposed.

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“…To reduce the greenhouse gases emissions into the atmosphere, several techniques have been reported e.g. thermal oxidation, membrane separation, biofiltration, absorption, and adsorption [3][4][5][6]. It is well-known that adsorption is considered to be the most useful technique, especially for low concentration gas pollution.…”

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confidence: 99%

PAN-based activated carbon nanofiber/metal oxide composites for CO2 and CH4 adsorption: influence of metal oxide

2021

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In the present study, we successfully prepared two different electrospun polyacrylonitrile (PAN) based-activated carbon nanofiber (ACNF) composites by incorporation of well-distributed Fe 2 O 3 and Co 3 O 4 nanoparticles (NPs). The influence of metal oxide on the structural, morphological, and textural properties of final composites was thoroughly investigated. The results showed that the morphological and textural properties could be easily tuned by changing the metal oxide NPs. Even though, the ACNF composites were not chemically activated by any activation agent, they presented relatively high surface areas (S BET ) calculated by Brunauer–Emmett–Teller (BET) equation as 212.21 and 185.12 m 2 /g for ACNF/Fe 2 O 3 and ACNF/Co 3 O 4 composites, respectively. Furthermore, the ACNF composites were utilized as candidate adsorbents for CO 2 and CH 4 adsorption. The ACNF/Fe 2 O 3 and ACNF/Co 3 O 4 composites resulted the highest CO 2 adsorption capacities of 1.502 and 2.166 mmol/g at 0 °C, respectively, whereas the highest CH 4 adsorption capacities were obtained to be 0.516 and 0.661 mmol/g at 0 °C by ACNF/Fe 2 O 3 and ACNF/Co 3 O 4 composites, respectively. The isosteric heats calculated lower than 80 kJ/mol showed that the adsorption processes of CO 2 and CH 4 were mainly dominated by physical adsorption for both ACNF composites. Our findings indicated that ACNF-metal oxide composites are useful materials for designing of CO 2 and CH 4 adsorption systems.

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Activated carbon surface modification by catalytic chemical vapor deposition of natural gas for enhancing adsorption of greenhouse gases

Cited by 15 publications

References 28 publications

Recent advances in the synthesis and applications of mordenite zeolite – review

Recent advances in the synthesis and applications of mordenite zeolite – review

One-Pot Cascade Catalysis of Dehydrochlorination of Greenhouse Gas HCFC-142b and Hydrochlorination of Acetylene for the Spontaneous Production of VDF and VCM

PAN-based activated carbon nanofiber/metal oxide composites for CO2 and CH4 adsorption: influence of metal oxide

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