Catalytic Control of Typical Particulate Matters and Volatile Organic Compounds Emissions from Simulated Biomass Burning

Abstract

Emissions of particulate matters (PMs) and volatile organic compounds (VOCs) from open burning of biomass often cause severe air pollution; a viable approach is to allow biomass to burn in a furnace to collectively control these emissions, but practical control technologies for this purpose are lacking. Here, we report a hollandite manganese oxide (HMO) catalyst that can efficiently control both typical PMs and VOCs emissions from biomass burning. The results reveal that typical alkali-rich PMs such as KCl particles are disintegrated and the K(+) ions are trapped in the HMO "single-walled" tunnels with a great trapping capacity. The K(+)-trapping HMO increases the electron density of the lattice oxygen and the redox ability, thus promoting the combustion of soot PMs and the oxidation of typical VOCs such as aldehydes and acetylates. This could pave a way to control emissions from biomass burning concomitant with its utilization for energy or heat generation.

Activating Inert Alkali‐Metal Ions by Electron Transfer from Manganese Oxide for Formaldehyde Abatement

“…The single‐atom alkali‐metal catalysts can even exhibit significant catalytic activities below 90 °C, but HMO is almost inactive below 90 °C, which implies that the single alkali‐metal ions anchored on the HMO surfaces serve as catalytically active sites for the low‐temperature oxidation of HCHO. Similar results with alkali metals as catalytic sites were also reported for the oxidation of soot and volatile organic compounds …”

“…Similar resultsw ith alkali metals as catalytic sites were also reported for the oxidation of soot and volatile organic compounds. [35,36] The E a value over K 1 /HMO or Rb 1 /HMO is about 84 kJ mol À1 for HCHO oxidation, which is approximately 5kJmol À1 lower than that of HMO ( Figure 4b). Moreover,i fR b + in the form of RbOH is supported on TiO 2 ,R bOH/TiO 2 is inactive to HCHO oxidation ( Figure S4 in the Supporting Information).…”

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

“…Recently, Chen et al 746 proposed that a hollandite Mn oxide (HMO) catalyst could efficiently control both typical particulate matter (PM) and VOC (EA and ethanol) emissions from biomass combustion. They revealed that typical alkali-rich PMs such as KCl particles were disintegrated and the K + ions were trapped in the HMO "single-walled" tunnels.…”

“…413 It was stated that the larger surface area of MnO x -CeO 2 offset their lower specific activity, allowing VOC deep destruction at lower temperatures than with the single oxides. Recently, Chen et al 746 proposed that a hollandite Mn oxide (HMO) could efficiently control both typical particulate matter (PM) and VOC (EA and ethanol) emissions from biomass combustion. They revealed that typical alkali-rich PMs such as KCl particles were disintegrated and the K + ions were trapped in the HMO "single-walled" tunnels.…”

Mass spectral chemical fingerprints reveal the molecular dependence of exhaust particulate matters on engine speeds

“…Atmospheric particulate matters (PMs), also known as particulate matters or atmospheric aerosol, are considered to be one of the most serious pollutants and cause serious health issues, such as cardiovascular and respiratory diseases and even mortality (Yuan et al, 2012;Chen et al, 2016a;Tao et al, 2014;Nguyen et al, 2015;Li et al, 2016;Qu et al, 2016;Pui et al, 2014;Maria et al, 2002). With the rapidly increasing amount of vehicles in use, automobile exhaust gases are becoming the main sources of PMs in urban areas (Goel and Guttikunda, 2015;Calvo et al, 2013;Karar and Gupta, 2007;Liu et al, 2016a;Kleeman et al, 2000;Police et al, 2016).…”