A comparative experimental study on characteristics of ultra-low NOx emission and fly ash between Fugu bituminous and its semi-coke with post-combustion

A computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established. The chemical percolation devolatilization (CPD) model, instead of an empirical method, has been adapted to predict the nitrogen release during the devolatilization. The current CFD model has been validated by comparing the simulated results with the experimental data obtained from the boiler for case study. The validated CFD model is then applied to study the effects of ratio of over fire air (OFA) on the combustion and nitrogen oxides (NOx) emission characteristics. It is found that, with increasing the ratio of OFA, the carbon content in fly ash increases linearly, and the NOx emission reduces largely. The OFA ratio of 30% is optimal for both high burnout of pulverized coal and low NOx emission. The present study provides helpful information for understanding and optimizing the combustion of the studied boiler

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Molecular dynamics and experimental study on the adhesion mechanism of polyvinyl alcohol (PVA) fiber in alkali-activated slag/fly ash

Cement and Concrete Research ◽

10.1016/j.cemconres.2021.106452 ◽

2021 ◽

Vol 145 ◽

pp. 106452

Author(s):

Shizhe Zhang ◽

Eduardo Duque-Redondo ◽

Albina Kostiuchenko ◽

Jorge S. Dolado ◽

Guang Ye

Keyword(s):

Molecular Dynamics ◽

Experimental Study ◽

Fly Ash ◽

Polyvinyl Alcohol ◽

Adhesion Mechanism ◽

Alkali Activated Slag ◽

Activated Slag ◽

Pva Fiber ◽

Alkali Activated

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Experimental study on cyclic loading characteristics of fly ash as partial replacement of cement in beam-column joint

Case Studies in Construction Materials ◽

10.1016/j.cscm.2020.e00362 ◽

2020 ◽

Vol 13 ◽

pp. e00362

Author(s):

Sayan Kumar Shaw ◽

Arjun Sil

Keyword(s):

Experimental Study ◽

Fly Ash ◽

Cyclic Loading ◽

Partial Replacement ◽

Column Joint

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Experimental Study on Mechanical Property of Concrete Based on Seawater and Sea Sand

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.641-642.574 ◽

2013 ◽

Vol 641-642 ◽

pp. 574-577 ◽

Cited By ~ 1

Author(s):

Ying Tao Li ◽

Ling Zhou ◽

Mao Jiang ◽

Yu Zhang ◽

Jun Shao

Keyword(s):

Mechanical Property ◽

Experimental Study ◽

Fly Ash ◽

Raw Materials ◽

Growth Trend ◽

Sea Sand ◽

Significant Strength ◽

Dry Conditions ◽

Early Strength ◽

Better Than

In this paper, the mechanical property experiments of concrete based on the seawater and sea sand have been carried in different raw materials preparation and different conservation environments. The results show that the early strength and late strength of concrete based on seawater and sea sand are better than concrete based on freshwater and sand. There is no significant strength decreased for concrete based on seawater and sea sand under accelerated alternating wet and dry conditions. For concrete based on seawater and sea sand mixed with admixture, the downward trend of late strength is significantly delayed, the late strength of concrete based on the seawater and sea sand mixed with slag gets the most obvious growth trend, while the late strength of seawater and sea sand concrete mixed with fly ash gets the largest increment.

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