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XRD study of coal microstructure evolution during air oxidation
(Asoc Quimicos, 2012-04)
Se ha estudiado la oxidación del carbón en aire a 270°C en tres carbones bituminosos durante 2-6 días. La microestructura de las muestras oxidadas se estudió mediante XRD y la evolución de la porosidad por adsorción de CO2 ...
Occupational airborne contamination in south Brazil: 1. Oxidative stress detected in the blood of coal miners
(SPRINGER, 2009)
Reactive oxygen species and nitrogen species have been implicated in the pathogenesis of coal dust-induced toxicity. The present study investigated several oxidative stress biomarkers (Contents of lipoperoxidation = TBARS, ...
Utilização do coque verde de petróleo da Petrobras em substituição parcial ao carvão mineral das misturas injetadas em altos fornos
(2010-04-01)
The Petrobras produced green petroleum coke (GPC) is a carbon rich fuel, virtually ash-free, with low sulfur content, and is a fuel suitable to replace metallurgical coke in blast furnaces. The GPC was tested in a pulverized ...
A comparative process study of chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU) for solid fuels
(Elsevier Sci LtdOxfordInglaterra, 2014)
Desarrollo de materiales cerámicos refractarios de baja densidad a partir de agentes ligantes nanoestructurados y carbónDevelopment of low density refractory materials from nanostructured binder and coal
(Sociedad Española de Cerámica y Vidrio, 2017-12)
En este trabajo se estudia el desarrollo de materiales cerámicos refractarios de baja densidad utilizando un agente ligante que genere, luego de calcinados, nanoestructuras cerámicas. Además, se adicionaron al sistema ...
Combustion of coal, bagasse and blends thereof Part I: Emissions from batch combustion of fixed beds of fuels
(ELSEVIER SCI LTDOXFORD, 2012)
Batch combustion of fixed beds of coal, bagasse and blends thereof took place in a pre-heated two-stage electric laboratory furnace, under high-heating rates. The average input fuel/air equivalence ratios were similar for ...
Exposure to contaminants from coal-tired thermoelectric plants and children’s health: What is the international and national evidence? Exposición a contaminantes provenientes de termoeléctricas a carbón y salud infantil: ¿Cuál es la evidencia internaciona
(Sociedad Chilena de Pediatria, 2019)
Coal-fired power plants (CFPP) represent a health risk to the exposed communities. A review of national and international scientific literature was made focused on the health effects on children and exposure to air emissions ...
Structural and spectroscopic analysis of gamma-Al2O3 to alpha-Al2O3-CoAl2O4 phase transition
(Elsevier B.V., 2006-05-10)
Co-doped alumina powders were synthesized by means of the polymeric precursor method to obtain ceramic pigments. The effect of different contents of Co2+ on phase transition gamma to alpha-Al2O3 and appearing of CoAl2O4 ...
Geospatial analysis of residential proximity to open-pit coal mining areas in relation to micronuclei frequency, particulate matter concentration, and elemental enrichment factors
(Elsevier B.V., 2018-09-01)
During coal surface mining, several activities such as drilling, blasting, loading, and transport produce large quantities of particulate matter (PM) that is directly emitted into the atmosphere. Occupational exposure to ...
Modificación de ambientes lóticos para la extracción de carbón a cielo abierto: Efectos sobre la biota y recomendaciones
(2018-01-01)
Open coal mining will cause a series of modifications to different lotic environments in Colombia. In this paper we analyzed the case of an open pit coal mine located in the Department of La Guajira, Colombia, focusing on ...