Simultaneous capture of NH3 and H2S using TiO2 and ZnO nanoparticles - laboratory evaluation and application in a livestock facility

Labrada, Guadalupe Montserrat Valdes; Kumar, Suraj; Azar, Ruth; Predicala, Bernardo; Nemati, Mehdi

doi:10.1016/j.jece.2019.103615

Cited by 10 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Adsorbents are essential elements of PPE to capture NH 3 . However, general-purpose adsorbents such as activated carbon, zeolites, and metal oxide blends face challenges of insufficient adsorption capacities and low affinities. − Therefore, new absorbents with high NH 3 capture ability, especially at low pressure, are desired.…”

Section: Introductionmentioning

confidence: 99%

Benign Integration of a Zn-Azolate Metal–Organic Framework onto Textile Fiber for Ammonia Capture

Cao

Chen

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Ammonia (NH3) exposure has a serious impact on human health because of its toxic and corrosive nature. Therefore, efficient personal protective equipment (PPE) such as masks is necessary to eliminate and mitigate NH3 exposure risks. Because economically and environmentally viable conditions are of interest for large-scale manufacture of PPE, we herein report a benign procedure to synthesize a Zn-azolate metal–organic framework (MOF), MFU-4, for NH3 capture. The surface area and morphology of MFU-4 obtained in alcohol solvents at room temperature is consistent with that of traditionally synthesized MFU-4 in N,N-dimethylformamide at 140 °C. In addition to its large NH3 uptake capacity at 1 bar (17.7 mmol/g), MFU-4 shows outstanding performance in capturing NH3 at low concentration (10.8 mmol/g at 0.05 bar). Furthermore, the mild synthetic conditions implemented make it facile to immobilize MFU-4 onto cotton textile fiber. Enhanced NH3 capture ability of the MFU-4/fiber composite was also attributed to the well-exposed MOF particles. The benign synthetic MFU-4 procedure, high NH3 uptake, and easy integration onto fiber pave the way toward implementation of similar materials in PPE.

show abstract

Section: Introductionmentioning

confidence: 99%

Benign Integration of a Zn-Azolate Metal–Organic Framework onto Textile Fiber for Ammonia Capture

Cao

Chen

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Chemical adsorption has been widely studied due to its advantages of having a large adsorption capacity. At present, the research and development of ammonia adsorbents has been extensive, such as activated carbon, 23−26 alumina or alumina composites, 27−29 zeolites, 30−34 porous organic polymers, 35 graphite oxide, 36 molecular sieves, 37 metal oxide nanoparticles, 38 and metal− organic frameworks. 39−42 Alkaline earth metal chlorides (AEMH) are considered one of the most promising NH 3 adsorbents due to their low adsorption temperature and high NH 3 adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

NH₃ Adsorption Performance of Silicon-Supported Metal Chlorides

Cheng

Wang

Shen

et al. 2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Alkaline earth metal chlorides (AEMH) are considered to be the key to effectively solving the problem of NH 3 storage due to their ability to react with NH 3 to form stable ammonia complexes. This study attempted to investigate the NH 3 adsorption performance of four metal chlorides (CuCl 2 , MnCl 2 , MgCl 2 , and CaCl 2 ) and silicon-supported composite adsorbents with a fixed bed. The adsorbents were characterized by X-ray diffraction, Brunauer−Emmett−Teller, and scanning electron microscopy to analyze the NH 3 adsorption behavior. The experiment found that the NH 3 adsorption capacity of four metal chlorides is in order: CuCl 2 > MnCl 2 > MgCl 2 > CaCl 2 , and the adsorption capacity of metal chlorides decreased with the increase in temperature. In addition, the composite adsorbents of silicon-supported metal chlorides were synthesized by the wet impregnation method. Ammonia adsorption experiments showed that silicon can significantly improve the NH 3 adsorption capacity of metal chlorides, and the NH 3 adsorption capacity of MnCl 2 /silicon was 127.5% higher than that of MnCl 2 . Silicon played the role of the skeleton support in the metal chloride particles, hindering the agglomeration between particles and increasing the number of pores on the surface of the particles, which was conducive to the diffusion of NH 3 through the pores into the particles for adsorption.

show abstract

“…Among the materials investigated as sorbents for ammonia are high-area carbon, porous organic polymers, zeolites, metal oxide nanoparticles, and metal–organic frameworks (MOFs). − Capture of ammonia at ppm level concentrations relies on strong interactions between the sorbent and the gas, as demonstrated in zeolites and metal–organic frameworks offering open Lewis acidic metal sites. − Available Brønsted acidic sites from hydroxos on the nodes can also offer sites for adsorption. , Chemical separation can be facilitated either by differences in sorbate/sorbent van der Waals interactions for different components of gas mixtures or by reversible chemical reactions between sorbate and sorbent. High capacity, ambient temperature, and modest pressure ammonia vapor storage and release by porous materials tends to rely on optimizing physisorption-relevant interactions. − While high-porosity MOFs have been explored as candidate sorbents for all three applications, our interests here extend only to low-concentration capture and to chemical separation.…”

Section: Introductionmentioning

confidence: 99%

Zirconium Metal–Organic Frameworks Integrating Chloride Ions for Ammonia Capture and/or Chemical Separation

Liu

Chen

Wang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Ammonia capture by porous materials is relevant to protection of humans from chemical threats, while ammonia separation may be relevant to its isolation and use following generation by emerging electrochemical schemes. Our previous work described both reversible and irreversible interactions of ammonia with the metal–organic framework (MOF) material, NU-1000, following thermal treatment at either 120 or 300 °C. In the present work, we have examined NU-1000-Cl, a variant that features a modified node structure–at ambient temperature, Zr6(μ3-O)4(μ3-OH)4(H2O)8 12+ in place of Zr6(μ3-O)4(μ3-OH)4(OH)4(H2O)4 8+. Carboxylate termini from each of eight linkers balance the 8+ charge of the parent node, while four chloride ions, attached only by hydrogen bonding, complete the charge balance for the 12+ version. We find that both reversible and irreversible uptake of ammonia are enhanced for NU-1000-Cl, relative to the chloride-free version. Two irreversible interactions were observed via in situ diffuse-reflectance infrared Fourier-transform spectroscopy: coordination of NH3 at open Zr sites generated during thermal pretreatment and formation of NH4 + by proton transfer from node aqua ligands. The irreversibility of the latter appears to be facilitated by the presence chloride ions, as NH4 + formation occurs reversibly with chloride-free NU-1000. At room temperature, chemically reversible (and irreversible) interactions between ammonia and NU-1000-Cl result in separation of NH3 from N2 when gas mixtures are examined with breakthrough instrumentation, as evinced by a much longer breakthrough time (∼9 min) for NH3.

show abstract

Simultaneous capture of NH3 and H2S using TiO2 and ZnO nanoparticles - laboratory evaluation and application in a livestock facility

Cited by 10 publications

References 35 publications

Benign Integration of a Zn-Azolate Metal–Organic Framework onto Textile Fiber for Ammonia Capture

Benign Integration of a Zn-Azolate Metal–Organic Framework onto Textile Fiber for Ammonia Capture

NH₃ Adsorption Performance of Silicon-Supported Metal Chlorides

Zirconium Metal–Organic Frameworks Integrating Chloride Ions for Ammonia Capture and/or Chemical Separation

Contact Info

Product

Resources

About

Simultaneous capture of NH3 and H2S using TiO2 and ZnO nanoparticles - laboratory evaluation and application in a livestock facility

Cited by 10 publications

References 35 publications

Benign Integration of a Zn-Azolate Metal–Organic Framework onto Textile Fiber for Ammonia Capture

Benign Integration of a Zn-Azolate Metal–Organic Framework onto Textile Fiber for Ammonia Capture

NH3 Adsorption Performance of Silicon-Supported Metal Chlorides

Zirconium Metal–Organic Frameworks Integrating Chloride Ions for Ammonia Capture and/or Chemical Separation

Contact Info

Product

Resources

About

NH₃ Adsorption Performance of Silicon-Supported Metal Chlorides