A review on mercury in coal combustion process: Content and occurrence forms in coal, transformation, sampling methods, emission and control technologies

Impact of ultra-low emission technology retrofit on the mercury emissions and cross-media transfer in coal-fired power plants.

Fabrication of BiOI/MoS2 heterojunction photocatalyst with different treatment methods for enhancing photocatalytic performance under visible-light

Magnetically recyclable Fe3O4 doped flower-like MoS2: Efficient removal of elemental mercury

The transformation of the power generation industry from coal-based to more sustainable energy sources is an irreversible trend. In China, the coal-fired power plant, as the main electric power supply facility at present, needs to know its own sustainability level to face the future competition. A hybrid multi-criteria decision making (MCDM) model is proposed in this paper to assess the sustainability levels of the existing Chinese coal-fired power units. The areal grey relational analysis (AGRA) method is involved in the hybrid model, and a combined weighting method is used to determine the priorities of the criteria. The combining weight fuses the fuzzy rough set (FRS) and entropy objective weighting method together with the analytic hierarchy process (AHP) subjective weighting method by game theory. Moreover, an AHP weighting uncertainty analysis using Monte Carlo (MC) simulation is introduced to measure the uncertainty of the results, and a 95 percent confidence interval (CI) is defined as the uncertainty measurement of the alternatives. A case study about eight coal-fired power units is carried out with a criteria system, which contains five aspects in an operational perspective, such as the flexibility, economic, environmental, reliability and technical criterion. The sustainability assessment is performed at the unit level, and the results give a priority rank of the eight alternatives; additionally, the uncertainty analysis supplies the extra information from a statistical perspective. This work expands a novel hybrid MCDM method to the sustainability assessment of the power generation systems, and it may be a benefit to the energy enterprises in assessing the sustainability at the unit level and enhance its ability in future sustainable development.

An Integrated Multi-Criteria Decision Making Model and AHP Weighting Uncertainty Analysis for Sustainability Assessment of Coal-Fired Power Units

Study on the Hg emission and migration characteristics in coal-fired power plant of China with an ammonia desulfurization process

Mercury emissions monitoring in a coal-fired power plant by using the EPA method 30B based on a calcium-based sorbent trap

Synthetic calcium-based adsorbents for gaseous mercury(II) adsorption from flue gas and study on their mercury adsorption mechanism

Experimental research on selective adsorption of gaseous mercury (II) over SiO2, TiO2 and γ-Al2O3

The invention discloses a high-temperature pyrolyzing type gaseous mercury form conversion device and a method. The device adopts a high temperature cracking furnace for heating the incoming flue gas on the basis of the high-temperature pyrolyzing characteristic of mercury under oxidation state, the in-furnace pipeline adopts the spiral arrangement for increasing the staying time of the flue gas in the cracking furnace and the heat exchange area of the gas flow in the pipe is expanded; and meanwhile, a granular inertial ceramic heat storage material is filled in a central area of a spiral pipe, the heat flux in the core area is increased, the heating uniformity of the gas flow in the pipe is promoted and the cracking time of the mercury under oxidation state is shortened; and an acidic gas absorbent is filled in a straight pipe on an outlet section of the cracking furnace, so that the secondary oxidation of the mercury under element state is eliminated and the measuring deviation of the mercury concentration is avoided. The device disclosed by the invention can completely realize the conversion of the mercury under oxidation state to the mercury under element state in the gas phase and can realize the real-time efficient conversion and online accurate measurement for the mercury form concentration in the gas phase under a practical flue gas condition.

High-temperature pyrolyzing type gaseous mercury form conversion device and method

Yiwu Zheng

Papers

Study on the Hg emission and migration characteristics in coal-fired power plant of China with an ammonia desulfurization process

Mercury emissions monitoring in a coal-fired power plant by using the EPA method 30B based on a calcium-based sorbent trap

Synthetic calcium-based adsorbents for gaseous mercury(II) adsorption from flue gas and study on their mercury adsorption mechanism

Experimental research on selective adsorption of gaseous mercury (II) over SiO2, TiO2 and γ-Al2O3

High-temperature pyrolyzing type gaseous mercury form conversion device and method