Coal Desulfurization in Oxidative Acid Media Using Hydrogen Peroxide and Ozone: A Kinetic and Statistical Approach

Pedroza, Francisco Raúl Carrillo; Sánchez, Araceli; Aguilar, María de Jesús Soria; Trevino, E.T. Pecina

doi:10.1021/ef900253g

Cited by 19 publications

(15 citation statements)

References 21 publications

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“…Oxidation with different oxidants, such as NaOCl, H 2 O 2 , and HNO 3 , has been extensively used for coal desulfurization (Li & Cho, 2005;Carrillo-Pedroza et al, 2009;Fallavena et al, 2012;Shen et al, 2012). Therefore, there should be SCCs present in the products from mild oxidation of coals.…”

Section: Sulfur-containing Chemicalsmentioning

confidence: 99%

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

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Coal-derived liquids (CDLs) are primarily generated from pyrolysis, carbonization, gasification, direct liquefaction, low-temperature extraction, thermal dissolution, and mild oxidation. CDLs are important feedstocks for producing value-added chemicals and clean liquid fuels as well as high performance carbon materials. Accordingly, the compositional characterization of chemicals in CDLs at the molecular level with advanced analytical techniques is significant for the efficient utilization of CDLs. Although reviews on advancements have been rarely reported, great progress has been achieved in this area by using gas chromatography/mass spectrometry (GC/MS), two-dimensional GC-time of flight mass spectrometry (GC × GC-TOFMS), and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). This review focuses on characterizing hydrocarbon, oxygen-containing, nitrogen-containing, sulfur-containing, and halogen-containing chemicals in various CDLs with these three mass spectrometry techniques. Small molecular (< 500 u), volatile and semi-volatile, and less polar chemicals in CDLs have been identified with GC/MS and GC × GC-TOFMS. By equipped with two-dimensional GC, GC × GC-TOFMS can achieve a clearly chromatographic separation of complex chemicals in CDLs without prior fractionation, and thus can overcome the disadvantages of co-elution and serious peak overlap in GC/MS analysis, providing much more compositional information. With ultrahigh resolving power and mass accuracy, FT-ICR MS reveals a huge number of compositionally distinct compounds assigned to various chemical classes in CDLs. It shows excellent performance in resolving and characterizing higher-molecular, less volatile, and polar chemicals that cannot be detected by GC/MS and GC × GC-TOFMS. The application of GC × GC-TOFMS and FT-ICR MS to chemical characterization of CDLs is not as prevalent as that of petroleum and largely remains to be developed in many respects. © 2016 Wiley Periodicals, Inc. Mass Spec Rev 36:543-579, 2017.

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Section: Sulfur-containing Chemicalsmentioning

confidence: 99%

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

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“…Central composite design is a standard design of experiments on RSM that examine a polynomial relationship between the independent variables and the dependent variables, yielding information on the interaction between dependent and independent variables (Carrillo-Pedroza et al 2009;Montgomery 2005). The relationships between two processes, ash and pyritic sulfur removal, and three controllable conditions, particle size, agitation speed, and initial pH, were examined according to FCCCD.…”

Section: Statistical Approach For Optimization Of the Bioleaching Promentioning

confidence: 99%

“…For interpretation of the interaction of operational variables, the use of three-dimensional plots of the regression model has been highly recommended (Carrillo-Pedroza et al 2009;Montgomery 2005). Figure 6 shows the 3D surface plots for the ash removal efficiency.…”

Section: Statistical Approach For Optimization Of the Bioleaching Promentioning

confidence: 99%

Optimization of Lithotrophic Activities of Acidithiobacillus ferrooxidans toward Significant Reduction of Sulfur and Ash from Low Rank Bitumen

Kourdestani

Habibi

Ahmadi

2016

Geomicrobiology Journal

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In the present study, the potential application of Acidithiobacillus ferrooxidans for elimination of ash and sulfur from bitumen was investigated in batch experiments. A comparison between the bioleaching and abiotic treatments indicated that A. ferrooxidans cells enhanced ash and pyritic sulfur removal by 20 and 59%, respectively. The X-ray diffraction profiles of the samples indicated the precipitation of some mineral elements inside of bitumen decreased the bioleaching performance after 9 days from beginning of the experiments. The effects of bitumen particle size (X 1 ), agitation speed (X 2 ) and initial pH (X 3 ) as interfacial factors each at three levels on the ash removal (Y 1 ) and pyritic sulfur removal (Y 2 ) were investigated by response surface methodology (RSM) as a statistical design of the experiment. On the basis of quadratic models applied to the performance of the bioleaching process, 66.42% of the pyritic sulfur and 50.88% of the ash could be removed after 9 days under optimal conditions, namely a bitumen particle size of 100 µm, an agitation speed of 80 rpm, and in initial pH of 2.

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“…There is growing concern regarding the oxidation of sulfide minerals (mainly pyrite, the most abundant sulfide on the planet) in sulfide-rich coal, resulting from exposure to oxygen and water or bacteria ( Thiobacilus ferroxidans , Gallionella ferruginea ). This oxidation promotes acidification of the environment and consequently the dissolution of metals in abandoned or operational mines, leading to acid mine drainage (AMD). , This prompts the mobilization of iron ions and sulfate to the medium in a wide pH range. − In the absence of alkaline materials, acid production reactions can continue indefinitely…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Zeolite/Backfill Blend for Acid Mine Drainage Remediation in Coal Mine

et al. 2018

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Brazilian coal exhibits high ash and sulfur content, making it more susceptible to acid mine drainage (AMD). Furthermore, combustion of this coal generates a significant amount of ash containing amorphous silicon and aluminum oxides, allowing alkaline hydrothermal processing of this waste via zeolites. These versatile compounds have been suggested as an alternative material for AMD remediation. This study aims to evaluate the use of zeolite Na–P1 in backfill blends for application in coal mines. Laboratory scale leaching experiments were performed, and several techniques (major and trace elements, pH, and conductivity) were monitored over time, in order to assess AMD remediation and the mobilization of ions in leachates using different zeolite/tailing blends. The results indicate that the addition of zeolites, obtained from coal ash, promotes the remediation of metal content in water generated by AMD and is therefore a more beneficial process in the removal of metal ions. With regard to the 50:50 backfill/zeolite blend, reductions of 100, 98, 39, 55, 94, and 41% were observed in aluminum, iron, calcium, magnesium, zinc, and manganese content, respectively, after 7 days of leaching. The increase in pH caused by zeolite addition promoted the precipitation of both metal ions and sulfate ions. The addition of 50% or 25% of zeolite in the backfill sample increased pH from 2.36 to 8.38 or 4.66, respectively, over a leaching period of 7 days.

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Coal Desulfurization in Oxidative Acid Media Using Hydrogen Peroxide and Ozone: A Kinetic and Statistical Approach

Cited by 19 publications

References 21 publications

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Optimization of Lithotrophic Activities of Acidithiobacillus ferrooxidans toward Significant Reduction of Sulfur and Ash from Low Rank Bitumen

Evaluation of Zeolite/Backfill Blend for Acid Mine Drainage Remediation in Coal Mine

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