Mineralogical and chemical characterisation of coals from Southern Chile

Helle, Sonia; Alfaro, Guillermo; Kelm, Ursula; Tascón, J.M.D.

doi:10.1016/s0166-5162(99)00047-6

Cited by 12 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coals within the forearc basin sedimentary succession exhibit the highest thermal maturity of all Chilean coal (Helle et al, 2000). However, there are only two published coalification values for the whole basin (Comisión-Nacional-de-Energía, 1989) and there were no previous models explaining the anomalously high coalification values in the Arauco basin, prompting this study.…”

Section: (A) Introductionmentioning

confidence: 78%

Thermal basin modelling of the Arauco forearc basin, south central Chile — Heat flow and active margin tectonics

et al. 2010

View full text Add to dashboard Cite

Section: (A) Introductionmentioning

confidence: 78%

Thermal basin modelling of the Arauco forearc basin, south central Chile — Heat flow and active margin tectonics

et al. 2010

View full text Add to dashboard Cite

“…While the coal mining is almost extinguished nowadays, coal reserves in these areas are estimated to last over 100 years. For instance, in Arauco region, there are a series of important deposits of bituminous and sub-bituminous in Eocene strata, with an approximated production of five metric tons per year 1 . Thus, one of our main research programs is taking advantage of this readily accessible carbon-based materials in order to develop products with broad application in industry.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Ability of Activated Carbon Obtained From Sub-Bituminous Coal (Lebu, Chile) to Capture Trimethylamine

Méndez¹,

Núñez²,

Cabrera‐Pardo³

et al. 2019

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The removal of organic contaminants, especially trimethylamine (TMA), have been successfully achieved using carbon activate. In this article, we report the formation of carbon activate (CA-SM) isolated from sub-bituminous coal in small mantles (SM) at the Mine "Mantos Negros" (Lebu, Chile). This coal was subjected to thermal oxidation with CO2 at 950 °C and their TMA adsorption capacity evaluated. SM and CA-SM were physically and chemically characterized showing that the activated carbon increased the surface porosity as well as the Iodine Index from 2.5 mg I2/g to 434 mg I2/g coal. The proximal and elementary analyses of CA-SM showed a significant reduction of sulfur, nitrogen and hydrogen, and increased composition of carbon and oxygen. These results together with FTIR and Boehm titration suggest that the surface composition of the activated carbon is acidic in nature. The adsorption of TMA by CA-SM was evaluated in dissolution at different pH and exposure time conditions. We found that TMA can be fully absorbed (50 ml TMA at 4 mg/L and 0.2000g of CA-SM) under neutral and basic pH after 60 minutes of exposure. The feasibility of producing activated carbon from sub-bituminous coal from Province of Arauco, Chile, is a promising alternative to develop coal-based products displaying adsorbent properties useful to control amine-derived contaminants produced in the fishing industry.

show abstract

“…1) contains a number of bituminous and sub-bituminous coals in Eocene strata. It is estimated that its production represents five million metric tones [3].…”

Section: Introductionmentioning

confidence: 99%

Chemical Characterization of Sub-Bituminous Coal From the Arauco Province - Chile

Méndez

Rivera

Pino

et al. 2016

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The chemical and sorptive characteristics of mineral coals extracted from a mine in Lebu (Biobío Region, Chile) and its derivatives were studied. These derivatives were obtained by applying a thermal treatment in an environment with N 2 and CO 2 at different experimental conditions, in order to increase their specific surface. In addition, coals were characterized by using proximal analysis, elementary analysis and petrographic analysis. In order to know their structure and surface, Boehm titration analysis, FTIR infrared spectroscopy, X-ray diffraction and scanning electron microscopy were performed. The surface of the selected carbons was modified by selectively oxidizing it with (NH 4 ) 2 S 4 O 8 and with H 2 O 2 e impregnating with an iron solution for the study with H 2 O 2 In the oxidation of H 2 O 2 , the work was carried out at different pH. The results show a moderate homogeneity between different types of seams studied, whereas when coals are treated with heat or strong oxidants, increases its surface and can be used with analytical applications (v.g. electroanalytical sensors).

show abstract

Mineralogical and chemical characterisation of coals from Southern Chile

Cited by 12 publications

References 3 publications

Thermal basin modelling of the Arauco forearc basin, south central Chile — Heat flow and active margin tectonics

Thermal basin modelling of the Arauco forearc basin, south central Chile — Heat flow and active margin tectonics

Adsorption Ability of Activated Carbon Obtained From Sub-Bituminous Coal (Lebu, Chile) to Capture Trimethylamine

Chemical Characterization of Sub-Bituminous Coal From the Arauco Province - Chile

Contact Info

Product

Resources

About