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  • Capture of Other Harmful Gases

    Introduction

    With the rapid development of global society, a large number of fossil fuels are used and human activities are becoming more frequent, which causing serious air pollution. The common air pollutants include nitrogen oxides, sulphur oxides, hydrogen sulphide, volatile organic compounds and others. Serious air pollution poses a great threat to human health and environmental health, according to the World Health Organization (WHO) announced that air pollution caused approximately 4.2 million people premature deaths in 2016 alone. Air pollution is now the one of global problems, it is very important and necessary to find some solutions to it. Thus, different actions have been taken, thereinto, the development of efficient technologies for the capture of toxic gases (e.g. NOx, SO2, H2S) from static and mobile sources is necessary, in order to achieve a cleaner environment.

    Capture of Other Harmful Gases

    Strategy for Harmful Gases Capture

    Generally, the filters made from activated carbon impregnated with copper, silver, zinc, and molybdenum salts are used to capture the harmful gases (NOx, SO2, H2S), however, they are not adequately effective against all potential threats. On the other hand, activated carbons and any needed improvements on its performance are largely limited by lack of control over the metrics and functionality of the pores because of the highly amorphous nature of its carbon network, which seriously prevents the effective capture of harmful gases. Metal-organic frameworks (MOFs) with the unprecedented surface area and the control with which their pore metrics and functionality can be designed provide limitless potential for their structure to be tailored to carry out a specific application, thus MOFs show very promising capabilities for the capture of these harmful gases (NOx, SO2, H2S).

    Capture of Other Harmful Gases

    Capture of Harmful Gases using MOFs

    MOFs materials are widely explored for capture of harmful gases (NOx, SO2, H2S) since their adsorption properties can be tuned as a function of the topology and chemical composition of the pores. In addition, the interactions of such functional groups (coordinatively unsaturated metal sites, m-OH groups, defective sites and halogen groups) of MOFs can worked well with these harmful molecules. Some of typical examples are list in table1[1]. The all below examples show good capture properties for the corresponding harmful gases.

    Table 1. Summary of the adsorption capacity of harmful gases for selected MOFs

    MaterialsBET surface area (m2/g)Harmful gas Adsorption (mmol/g)
    MOF-1774100SO225.7
    MFM-1702408SO217.5
    MIL-101(Cr)-4F(1%)2176SO218.4
    MIL-47(V)930H2S14.6
    MIL-53(Cr)1946H2S12.0
    MIL-53(Al)-TDC1150H2S18.5
    MIL-101(Cr)2916H2S30.1
    UiO-66-NH2 NO220.3
    MFM-300(Al) NO214.1
    HKUST-1 NO3
    CuII-MFU-4l NO1.41

    What Can Alfa Chemistry Do

    Alfa Chemistry devotes oneself to provide valuable information and MOFs materials on the significant progress on the environmental-remediation field, our high-quality MOFs could help you to realize more and novel research on the challenging task of harmful gases capture. We also provide customers with professional MOFs and design and customization services. In addition, Alfa Chemistry is committed to supporting customers a series of solutions in capture of harmful gases by using MOFs. We will serve you with the most abundant experience and the most affordable price. If you have any problems, we will provide technical support for you. If you have special needs, we will develop a unique solution for you. Please don't hesitate to contact us.

    Reference:

    1. Eva M.A.; et al. Capture of toxic gases in MOFs: SO2, H2S, NH3 and NOx[J]. Chemical Science, 2021, 12, 6772-6799.

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