Andrés Anca-Couce
Graz University of Technology
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Publication
Featured researches published by Andrés Anca-Couce.
Journal of Agricultural and Food Chemistry | 2014
Alice Budai; Liang Wang; Morten Grønli; Line Tau Strand; Michael Jerry Antal; Samuel Abiven; Alba Dieguez-Alonso; Andrés Anca-Couce; Daniel P. Rasse
Biochar properties vary, and characterization of biochars is necessary for assessing their potential to sequester carbon and improve soil functions. This study aimed at assessing key surface properties of agronomic relevance for products from slow pyrolysis at 250-800 °C, hydrothermal carbonization (HTC), and flash carbonization. The study further aimed at relating surface properties to current characterization indicators. The results suggest that biochar chemical composition can be inferred from volatile matter (VM) and is consistent for corncob and miscanthus feedstocks and for the three tested production methods. High surface area was reached within a narrow temperature range around 600 °C, whereas cation exchange capacity (CEC) peaked at lower temperatures. CEC and pH values of HTC chars differed from those of slow pyrolysis biochars. Neither CEC nor surface area correlated well with VM or atomic ratios. These results suggest that VM and atomic ratios H/C and O/C are good indicators of the degree of carbonization but poor predictors of the agronomic properties of biochar.
Gcb Bioenergy | 2018
Hans-Peter Schmidt; Andrés Anca-Couce; Nikolas Hagemann; Constanze Werner; Dieter Gerten; Wolfgang Lucht; Claudia Kammann
The growth of biomass is considered the most efficient method currently available to extract carbon dioxide from the atmosphere. However, biomass carbon is easily degraded by microorganisms releasing it in the form of greenhouse gases back to the atmosphere. If biomass is pyrolyzed, the organic carbon is converted into solid (biochar), liquid (bio‐oil), and gaseous (permanent pyrogas) carbonaceous products. During the last decade, biochar has been discussed as a promising option to improve soil fertility and sequester carbon, although the carbon efficiency of the thermal conversion of biomass into biochar is in the range of 30%–50% only. So far, the liquid and gaseous pyrolysis products were mainly considered for combustion, though they can equally be processed into recalcitrant forms suitable for carbon sequestration. In this review, we show that pyrolytic carbon capture and storage (PyCCS) can aspire for carbon sequestration efficiencies of >70%, which is shown to be an important threshold to allow PyCCS to become a relevant negative emission technology. Prolonged residence times of pyrogenic carbon can be generated (a) within the terrestrial biosphere including the agricultural use of biochar; (b) within advanced bio‐based materials as long as they are not oxidized (biochar, bio‐oil); and (c) within suitable geological deposits (bio‐oil and CO2 from permanent pyrogas oxidation). While pathway (c) would need major carbon taxes or similar governmental incentives to become a realistic option, pathways (a) and (b) create added economic value and could at least partly be implemented without other financial incentives. Pyrolysis technology is already well established, biochar sequestration and bio‐oil sequestration in soils, respectively biomaterials, do not present ecological hazards, and global scale‐up appears feasible within a time frame of 10–30 years. Thus, PyCCS could evolve into a decisive tool for global carbon governance, serving climate change mitigation and the sustainable development goals simultaneously.
Progress in Energy and Combustion Science | 2016
Andrés Anca-Couce
Combustion and Flame | 2012
Andrés Anca-Couce; Nico Zobel; Anka Berger; Frank Behrendt
Energy Conversion and Management | 2014
Andrés Anca-Couce; Ramin Mehrabian; Robert Scharler; Ingwald Obernberger
Fuel | 2016
Andrés Anca-Couce; Ingwald Obernberger
Fuel | 2013
Andrés Anca-Couce; Nico Zobel; Hugo A. Jakobsen
Fuel | 2012
Andrés Anca-Couce; Nico Zobel
Biomass & Bioenergy | 2017
Pietro Bartocci; Andrés Anca-Couce; K Slopiecka; S Nefkens; Nikola Evic; Stefan Retschitzegger; Marco Barbanera; Cinzia Buratti; Franco Cotana; Gianni Bidini; Francesco Fantozzi
Journal of Analytical and Applied Pyrolysis | 2013
Alba Dieguez-Alonso; Andrés Anca-Couce; Nico Zobel