Magnetic pyrrhotite, derived from the thermal treatment of natural pyrite, was developed as a recyclable sorbent to recover elemental mercury (Hg) from the flue gas as a cobenefit of wet electrostatic precipitators (WESP). The performance of naturally derived pyrrhotite for Hg capture from the flue gas was much better than those of other reported magnetic sorbents, for example Mn-Fe spinel and Mn-Fe-Ti spinel. The rate of pyrrhotite for gaseous Hg capture at 60 °C was 0.28 μg g min and its capacity was 0.22 mg g with the breakthrough threshold of 4%. After the magnetic separation from the mixture collected by the WESP, the spent pyrrhotite can be thermally regenerated for recycle. The experiment of 5 cycles of Hg capture and regeneration demonstrated that both the adsorption efficiency and the magnetization were not notably degraded. Meanwhile, the ultralow concentration of gaseous Hg in the flue gas was concentrated to high concentrations of gaseous Hg and Hg during the regeneration process, which facilitated the centralized control of mercury pollution. Therefore, the control of Hg emission from coal-fired plants by the recyclable pyrrhotite was cost-effective and did not have secondary pollution.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.est.6b03288 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Electrochemical approaches for CO point source, direct air, and seawater capture: identifying opportunities and synergies.
Environ Sci Pollut Res Int
January 2025
Institute for Integrated Energy Systems at University of Victoria (IESVic), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada.
The world is increasingly facing the direct effects of climate change triggering warnings of a crisis for the healthy existence of humankind. The dominant driver of the climate emergency is the historical and continued accumulation of atmospheric CO altering net radiative forcing on the planet. To address this global issue, understanding the core chemistry of CO manipulation in the atmosphere and proximally in the oceans is crucial, to offer a direct partial solution for emissions handling through negative emissions technologies.
View Article and Find Full Text PDFGasification-MILD combustion technology with ash-sludge recirculation for reducing multi-phase net dioxin discharges from a waste incineration.
Waste Manag
January 2025
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081 China.
This study addresses the challenge of reducing "net" toxic pollutant discharge, specifically dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), while minimizing the energy consumption and costs associated with detoxification. Our research focuses on reintroducing fly ash and scrubber sludge (ASR) into a hazardous waste thermal treatment system equipped with gasification-intense low oxygen dilution (GASMILD) and an advanced air pollution control system (APCS). This approach yielded a remarkable PCDD/F removal efficiency exceeding 99.
View Article and Find Full Text PDFAuthor Correction: Design of retrofit flue gas (CO) scrubber for dependable clean energy at the Duvha Coal Power Plant.
Sci Rep
January 2025
Department of Chemical Engineering, University of Pretoria, Cnr Lynnwood Road and Roper Street, Hatfield, Pretoria, 0028, South Africa.
Integrated system for electrolyte recovery, product separation, and CO capture in CO reduction.
Nat Commun
January 2025
School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou, 510006, China.
Challenges in CO capture, CO crossover, product separation, and electrolyte recovery hinder electrocatalytic CO reduction (COR). Here, we present an integrated electrochemical recovery and separation system (ERSS) with an ion separation module (ISM) between the anode and cathode of a water electrolysis system. During ERSS operation, protons from the anolyte flow through the anodic cation exchange membrane (CEM) into the ISM, acidifying the COR effluent electrolyte.
View Article and Find Full Text PDFTransforming sludge into energy: impact of blend percentage on energy recovery potential and environmental benefits of co-combustion of wastewater sludge and coal in Brazil.
Waste Manag
January 2025
Energy and Sustainability Department (EES), Federal University of Santa Catarina (UFSC), 88905-120, Araranguá, SC, Brazil. Electronic address:
Proper waste management and sustainable energy production are crucial for human development. For this purpose, this study evaluates the impact of blending percentage on energy recovery potential and environmental benefits of co-combustion of wastewater sludge and Brazilian low-rank coal. The sludge and coal were characterised in terms of their potential as fuel and co-combustion tests were carried out in a pilot-scale bubbling fluidised bed focused on the influence of the percentage of sludge mixture on the behaviour of co-combustion with coal in terms of flue gas composition and fluidised bed temperature stability.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!