Dataset Information

NO _X and SO _X Flue Gas Treatment System Based on Sulfur-Enriched Organic Oil in Water Emulsion.

ABSTRACT: Nitrogen (NO _X ) and sulfur (SO _X ) oxides, the major gaseous pollutants emitted from fossil fuel combustion, have significant health and environmental concerns. Environmental regulations limit these pollutant emissions to tolerable levels. Currently, these pollutants are treated by flue gas desulfurization (SO _X removal) and selective catalytic reduction (NO _X removal) processes. However, these technologies require large footprints, use expensive catalysts, and operate under high working temperatures. A new catalyst is reported herein, based on sulfur-enriched oil emulsified with water, where the active catalytic species are sulfur-based oxides. The catalyst has been developed using O₂ as the oxidation reagent in a low-temperature wet scrubber rather than H₂O₂ or O₃ that are presently used. The catalytically oxidized pollutants are converted to produce ammonium fertilizers by NH₄OH addition. As a result of treatment with this novel catalyst, we observed reductions in emissions of SO _X and NO _X of >85% and 23%, respectively. The catalyst production and the wet scrubbing process are discussed in detail.

SUBMITTER: Khabra A

PROVIDER: S-EPMC7859937 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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NO X and SO X Flue Gas Treatment System Based on Sulfur-Enriched Organic Oil in Water Emulsion.

Khabra Alon A Pinhasi Gad A GA Zidki Tomer T

ACS omega 20210121 4

Nitrogen (NO X ) and sulfur (SO X ) oxides, the major gaseous pollutants emitted from fossil fuel combustion, have significant health and environmental concerns. Environmental regulations limit these pollutant emissions to tolerable levels. Currently, these pollutants are treated by flue gas desulfurization (SO X removal) and selective catalytic reduction (NO X removal) processes. However, these technologies require large fo ...[more]

PMID: 33553875

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Project description:Supported by increasingly available reserves, natural gas is achieving greater adoption as a cleaner-burning alternative to coal in the power sector. As a result, carbon capture and sequestration from natural gas-fired power plants is an attractive strategy to mitigate global anthropogenic CO2 emissions. However, the separation of CO2 from other components in the flue streams of gas-fired power plants is particularly challenging due to the low CO2 partial pressure (∼40 mbar), which necessitates that candidate separation materials bind CO2 strongly at low partial pressures (≤4 mbar) to capture ≥90% of the emitted CO2. High partial pressures of O2 (120 mbar) and water (80 mbar) in these flue streams have also presented significant barriers to the deployment of new technologies for CO2 capture from gas-fired power plants. Here, we demonstrate that functionalization of the metal-organic framework Mg2(dobpdc) (dobpdc4- = 4,4'-dioxidobiphenyl-3,3'-dicarboxylate) with the cyclic diamine 2-(aminomethyl)piperidine (2-ampd) produces an adsorbent that is capable of ≥90% CO2 capture from a humid natural gas flue emission stream, as confirmed by breakthrough measurements. This material captures CO2 by a cooperative mechanism that enables access to a large CO2 cycling capacity with a small temperature swing (2.4 mmol CO2/g with ΔT = 100 °C). Significantly, multicomponent adsorption experiments, infrared spectroscopy, magic angle spinning solid-state NMR spectroscopy, and van der Waals-corrected density functional theory studies suggest that water enhances CO2 capture in 2-ampd-Mg2(dobpdc) through hydrogen-bonding interactions with the carbamate groups of the ammonium carbamate chains formed upon CO2 adsorption, thereby increasing the thermodynamic driving force for CO2 binding. In light of the exceptional thermal and oxidative stability of 2-ampd-Mg2(dobpdc), its high CO2 adsorption capacity, and its high CO2 capture rate from a simulated natural gas flue emission stream, this material is one of the most promising adsorbents to date for this important separation.

Dataset Information

NO _X and SO _X Flue Gas Treatment System Based on Sulfur-Enriched Organic Oil in Water Emulsion.

Publications

NO <i><sub>X</sub></i> and SO <i><sub>X</sub></i> Flue Gas Treatment System Based on Sulfur-Enriched Organic Oil in Water Emulsion.

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