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Record W2390521330

Mercury removal by ESP and WFGD in a 300 MW coal-fired power plant

2013· article· en· W2390521330 on OpenAlexaboutno aff
Jiezhong Shen

Bibliographic record

VenueRanliao huaxue xuebao · 2013
Typearticle
Languageen
FieldEnvironmental Science
TopicMercury impact and mitigation studies
Canadian institutionsnot available
Fundersnot available
KeywordsMercury (programming language)ChemistryFlue-gas desulfurizationFly ashElectrostatic precipitatorFlue gasCoalEnvironmental chemistryMERCUREWaste managementAnalytical Chemistry (journal)Organic chemistry
DOInot available

Abstract

fetched live from OpenAlex

The Ontario Hydro Method(OHM) was used to sample and analyze the mercury concentration in flue gas before and after ESP and WFGD in a 300 MW power plant.Mercury content in coal,bottom slag,fly ash of ESP,adsorbent(limestone) and desulfurization product(gypsum) was detected by DMA80.Mercury mass balance was calculated based on the online measurements through the boiler system.Factors affecting the distribution,transformation and removal of mercury in flue gas were discussed.The results show that the gaseous mercury(Hg0 and Hg2+) in flue gas accounts for about 95% of total mercury,while mercury in the bottom ash can be neglected.More than 95% of Hgp and a little gaseous phase mercury(Hg0 and Hg2+)were removed by ESP.The efficiencies to remove total mercury by ESP range from 12.77% to 17.38%.A removal efficiency for Hg2+(g) reaches up to 79.93%~90.53% by WFGD,however,the content of Hg0 after WFGD increases because part of oxidized mercury is reduced to elemental mercury during WFGD.The efficiencies to remove total mercury by WFGD range from 9.68% to 29.36%.ESP and WFGD can remove all of the Hgp and a majority of Hg2+ with a total mercury removal efficiency of 25.38%~38.38%.In general,the demercuration in the conventional devices of ESP and WFGD is not high,which perhaps is owing to the lower concentration of Cl in feed coal.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesInsufficient payload (model declined to judge)
Consensus categoriesInsufficient payload (model declined to judge)
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.317
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0040.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.009
GPT teacher head0.222
Teacher spread0.213 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; both teacher heads agree on what is shown here.

Study designNot applicable
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations5
Published2013
Admission routes1
Has abstractyes

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