Author
Roberto García
Other affiliations: University of Oviedo
Bio: Roberto García is an academic researcher from Spanish National Research Council. The author has contributed to research in topics: Carbonization & Coal. The author has an hindex of 25, co-authored 78 publications receiving 2036 citations. Previous affiliations of Roberto García include University of Oviedo.
Topics: Carbonization, Coal, Coal tar, Biomass, Pyrolysis
Papers published on a yearly basis
Papers
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TL;DR: To optimize the combustion process in adequate reactors, a comprehensive study of the characterization of biomass fuel properties is needed, which includes proximate analysis, ultimate analysis, and calorimetry, focusing on biomass fuels obtained in Spain.
359 citations
TL;DR: This work proposes a 25 min-last thermogravimetric method as a tool to determine biomass sample's proximate analysis data just by direct measure of weight changes on each sample's TG chart, which is faster and easier to develop technique.
220 citations
TL;DR: A two-stage reaction model is proposed and it has been found that Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose model-free methods are not suitable to determine the kinetic parameters of biomass combustion since the assumptions of these two methods were not accomplished in the full range of the combustion process.
106 citations
TL;DR: In this article, the authors used a mixture of single, well-defined model compounds for coal pyrolysis and showed that the resulting mixture contained the macroscopic features of high volatile coal (proximate and ultimate analyses).
105 citations
TL;DR: No relevant differences in the burnout value were detected between the coal and coal/torrefied biomass blends due to the high reactivity of the coal.
96 citations
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TL;DR: Nitrogen-doped carbon nanofiber webs (CNFWs) with high surface areas are successfully prepared by carbonization-activation of polypyrrole nan ofiber webs with KOH, which exhibit a superhigh reversible capacity and porous nanostructure.
Abstract: Nitrogen-doped carbon nanofiber webs (CNFWs) with high surface areas are successfully prepared by carbonization-activation of polypyrrole nanofiber webs with KOH. The as-obtained CNFWs exhibit a superhigh reversible capacity of 943 mAh g(-1) at a current density of 2 A g(-1) even after 600 cycles, which is ascribed to the novel porous nanostructure and high-level nitrogen doping.
1,516 citations
TL;DR: In this paper, a state-of-the-art update on the most recent developments concerning the advanced heteroatom doping of carbon that goes beyond nitrogen is given, with respect to their boron-, sulphur-and phosphorus-doping.
Abstract: Heteroatom doped carbon materials represent one of the most prominent families of materials that are used in energy related applications, such as fuel cells, batteries, hydrogen storage or supercapacitors. While doping carbons with nitrogen atoms has experienced great progress throughout the past decades and yielded promising material concepts, also other doping candidates have gained the researchers' interest in the last few years. Boron is already relatively widely studied, and as its electronic situation is contrary to the one of nitrogen, codoping carbons with both heteroatoms can probably create synergistic effects. Sulphur and phosphorus have just recently entered the world of carbon synthesis, but already the first studies published prove their potential, especially as electrocatalysts in the cathodic compartment of fuel cells. Due to their size and their electronegativity being lower than those of carbon, structural distortions and changes of the charge densities are induced in the carbon materials. This article is to give a state of the art update on the most recent developments concerning the advanced heteroatom doping of carbon that goes beyond nitrogen. Doped carbon materials and their applications in energy devices are discussed with respect to their boron-, sulphur- and phosphorus-doping.
1,490 citations
TL;DR: An extended overview of the advantages and disadvantages of biomass composition and properties for biofuel application was conducted based on reference peer-reviewed data plus own investigations as mentioned in this paper, which showed that the major environmental, economic and social benefits appeared to compensate the technological and other barriers caused by the unfavourable composition of biomass.
462 citations
TL;DR: In this paper, a comprehensive review of physicochemical properties of lignocellulosic biomass, including particle size, grindability, density, flowability, moisture sorption, thermal properties, proximate analysis properties, elemental composition, energy content and chemical composition, is presented.
Abstract: Lignocellulosic biomass is the most abundant and renewable material in the world for the production of biofuels. Using lignocellulosic biomass derived biofuels could reduce reliance on fossil fuels and contribute to climate change mitigation. A profound understanding of the physicochemical properties of lignocellulosic biomass and the analytical characterization methods for those properties is essential for the design and operation of associated biomass conversion processing facilities. The present article aims to present a comprehensive review of physicochemical properties of lignocellulosic biomass, including particle size, grindability, density, flowability, moisture sorption, thermal properties, proximate analysis properties, elemental composition, energy content and chemical composition. The corresponding characterization techniques for these properties and their recent development are also presented. This review is intended to provide the readers systematic knowledge in the physicochemical properties of lignocellulosic biomass and characterization techniques for the conversion of biomass and the application of biofuels.
398 citations
TL;DR: An extended overview of phase-mineral transformations of organic and inorganic matter that occur during biomass combustion was conducted in this article, where it was demonstrated that the phase composition of BA is polycomponent, heterogeneous and variable and includes: (1) mostly inorganic material (IM) composed of non-crystalline (amorphous) and crystalline to semiscale constituents; (2) subordinately organic matter (OM) consisting of char and organic minerals; and (3) some fluid matter associated with both IM and OM.
358 citations