Preparation of active carbons from a commercial holm-oak charcoal: study of micro- and meso-porosity

Macı́as-Garcı́a, A.; Bernalte‐García, María Josefa; Dı́az-Dı́ez, M.A.; Jiménez, A. Hernández

doi:10.1007/s00226-003-0191-7

Cited by 14 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a consequence, it has been traditionally used for general construction purposes, firewood, and charcoal manufacture. In this connection, the charcoal has been recently used as the raw material for the preparation of activated carbons [1].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Zn(II) in aqueous solution by activated carbons prepared from evergreen oak (Quercus rotundifolia L.)

Gómez-Tamayo

Macı́as-Garcı́a

Díez

et al. 2008

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Adsorption of Zn(II) in aqueous solution by activated carbons prepared from evergreen oak (Quercus rotundifolia L.)

Gómez-Tamayo

Macı́as-Garcı́a

Díez

et al. 2008

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Ash of precursor (%) Product Ash of product (%) A BET (m 2 /g) V (cm 3 /g) V (cm 3 no transformation but behave as centers for nucleation of the silica phase.…”

Section: Precursormentioning

confidence: 99%

“…However, this problem may be solved by applying of comprehensive biomass processing methods not only to generate heat or electricity but also to convert biomass into valuable products, such as synthesis gas, chemicals and valuable activated carbons [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. This approach raises sufficiently the profitability of the renewable energetic.…”

Section: Introductionmentioning

confidence: 99%

Preparation and investigation of nanostructured carbonaceous composites from the high-ash biomass

Yakovlev

Лебедев

Ermakov

et al. 2007

Chemical Engineering Journal

View full text Add to dashboard Cite

“…The general trends reported by Lehman et al [59] as plotted in Figure 9a, show that in thermal pyrolysis conditions, the surface area peaks at around 400 m 2 /g. For gasification studies in Figure 9b [60][61][62], where air was used to provide significant heat to the system, the air significantly reduces the porosity at 700 degrees Celsius to a 100 m 2 /g. Our data point fills the part of the gap where the biochar temperature is 800 degrees and the data at 950 has a higher porosity, as seen in Figure 9b.…”

Section: • Bet Biochar Analysismentioning

confidence: 99%

An Experimental and Theoretical Study of the Gasification of Miscanthus Briquettes in a Double-Stage Downdraft Gasifier: Syngas, Tar, and Biochar Characterization

et al. 2018

View full text Add to dashboard Cite

The goal of this work is to understand the gasification process for Miscanthus briquettes in a double-stage downdraft gasifier, and the impact of different Equivalence Ratios (ER) on syngas, biochar, and tar characteristics. The optimal ER was found to be 0.35, which yielded a syngas maximum heating value of 5.5 MJ/Nm 3 with a syngas composition of 20.29% CO, 18.68% H 2 , and 0.86% CH 4 . To better understand the observed behavior, an equilibrium reaction model was created and validated using the experimental data. The model showed that the heating value decreased with increasing ER, and that hydrogen production peaked at ER = 0.37, while methane (CH 4 ) became negligible above ER = 0.42. Tar and particle content in the gas produced at a certain temperature can now be predicted. To assess the biochar characteristics, surface structure image analysis and a surface area porosity analysis were carried out. Employing images from a scanning electron microscope (SEM), the biochar cell bonds and pore structures were examined and analyzed. By using the Brunauer-Emmett-Teller (BET) analysis of the surface porosity, the surface area to be 186.06 m 2 /g and the micro pore volume was calculated to be 0.07 m 3 /g. The final aspect of the analysis involved an evaluation of tar production. Combining current and prior data showed a logarithmic relationship between the amount of tar produced and the gasifier bed temperature, where the amount of tar produced decreased with increasing bed temperature. This results in very low tar levels, which is one of the known advantages for a double-stage downdraft gasifier over a single-stage system. Energies 2018, 11, 3225 2 of 23where currently only 290 million of 915 million inhabitants have access to electricity [2]. It is clear that different sustainable technologies have to be developed to achieve clean energy production. Biomass gasification is one of the possible routes through which carbon-neutral energy can be produced.Gasification is a process that converts organic carbonaceous materials at high temperatures into a fuel gas containing carbon monoxide (CO), hydrogen (H 2 ), methane (CH 4 ), and carbon dioxide (CO 2 ) [3]. Produced gases, with high concentrations of CO and H 2 from the gasifier, can be fed into internal combustion engines for power production [4,5]. The syngas from the gasifier could be used for different purposes, such as producing chemical products, especially when it contains a high percentage of CO 2 and CH 4 [6]. The calorific value of the gas is dependent on the gasifying agent. The calorific value of the gas using air ranges between 4-7 MJ Nm −3 , while when gasifying with pure oxygen, the heating value of the gas ranges between 12-28 MJ Nm −3 [4]. There are many useful products of biomass gasification, including syngas, heat, power, biofuels, fertilizer, and biochar [4].The application of gasification can be found in several projects around the world, ranging from large industrial-scale projects (energy output in MW) to small-scale projects (in kW). Some examp...

show abstract

Preparation of active carbons from a commercial holm-oak charcoal: study of micro- and meso-porosity

Cited by 14 publications

References 12 publications

Adsorption of Zn(II) in aqueous solution by activated carbons prepared from evergreen oak (Quercus rotundifolia L.)

Adsorption of Zn(II) in aqueous solution by activated carbons prepared from evergreen oak (Quercus rotundifolia L.)

Preparation and investigation of nanostructured carbonaceous composites from the high-ash biomass

An Experimental and Theoretical Study of the Gasification of Miscanthus Briquettes in a Double-Stage Downdraft Gasifier: Syngas, Tar, and Biochar Characterization

Contact Info

Product

Resources

About