Characterization of biochars produced from pyrolysis of pelletized agricultural residues

Anaerobic co-digestion technology is increasingly used to simultaneously treat solid and liquid organic waste to balance nutrient content, to reduce the negative effects of toxic compounds in the process, and to increase biogas yield. The aim of this study was to analyze the economic performance of co-digestion plants fed with agro-industrial wastes as a function of installed power, with a method of discounted cash flow. The study focused on Italian framework conditions concerning payment for electricity produced by anaerobic digestion (AD) plants as well as the production costs. The economic analysis was carried out using three different plant sizes: 100 kW, 500 kW, and 1000 kW, which are representative of biogas plants in Italy. The study showed that the improvement of the break-point is closely linked to the increase in corresponding plant size. Given the assumptions of the simulation, the payback for the 100 kW plant was nine years for both the all-inclusive tariff and the basic feed-in tariff (BFT). Regarding the 500 kW and 1000 kW plants, the payback periods were five and four years, respectively.

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“…The sale price of electricity in the free market for 2017 was considered equal to €39.38/MWh [25][26][27][28].…”

Section: Resultsmentioning

confidence: 99%

“…Anaerobic co-digestion technology is increasingly used to simultaneously treat solid and liquid organic waste with the aims of balancing the nutrient content, to reduce the negative effects of toxic compounds on the process, and to increase the biogas yield and CO 2 capture like those of others biofuels [5,7,9,12,16,17,28].…”

Section: Discussionmentioning

confidence: 99%

An Economical Evaluation of Anaerobic Digestion Plants Fed with Organic Agro-Industrial Waste

et al. 2017

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“…Thermal conversion of biomass through pyrolysis allows production of materials that can be used for a wide range of applications that provide solutions to the most pressing environmental problems [1][2][3][4][5][6][7][8][9]. However, the properties of biochars will determine the type of application and the efficiency of the processes involved.…”

Section: Introductionmentioning

confidence: 99%

Effects of pyrolysis parameters on the yield and properties of biochar from pelletized sunflower husk

et al. 2018

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Abstract. Pyrolysis of biomass residues from agriculture and food processing industry allows production of biochars with diverse physical and chemical properties for a wide range of applications in agriculture and environmental protection. Biochars produced from pelletized sunflower husks through slow pyrolysis in the range of temperatures (480-580°C) showed total carbon of 70.53%-81.96%, total nitrogen of 1.2%, alkaline pH (9.37-10.32), low surface area (0.93-2.91 m 2 g -1 ) and porosity of 13.23-15.43%. Higher pyrolysis temperatures resulted in lower biochar yields. With the increase in temperature the content of organic matter, nitrogen, Ca and Mg decreased whereas the increase in temperature resulted in higher contents of total carbon and phosphorus. Produced biochars showed potential for agricultural applications.

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“…Gases were mainly composed by carbon dioxide (between 60.0 and 72.5 wt%), hydrogen (between 8.3 and 24.4 wt%) and hydrocarbons (between 11.1 and 16.1 wt%, methane being the most important hydrocarbon in all the cases). Observed carbon dioxide and hydrogen yields were higher than those obtained with other biomasses [63][64][65]. The yield of hydrogen in the case of A. donax pyrolysis was much higher while that of carbon dioxide resulted lower than in the other cases.…”

Section: Characterization Of Gas and Solid Productsmentioning

confidence: 59%

Pyrolytic conversion of perennial grasses and woody shrubs to energy and chemicals

et al. 2019

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Spartina argentinensis, Panicum prionitis, and Arundo donax are perennial grasses and Geoffroea decorticans is a shrub, all of which grow under adverse conditions in the Litoral region in Argentina. The pyrolytic conversion of these biomasses was studied at 550 °C in a fixed bed reactor during 30 min under N 2 flow with a 20 °C min −1 heating ramp starting at room temperature. The main products were liquid, two phases (aqueous and oil) being observed with the aqueous phases being the most important in all the cases (yields from 29.2 to 45.7 wt%). The highest yield for an oil phase (18 wt%) was observed with the shrub and the yield of gases and chars were similar in all the cases. By means of sequential vacuum distillation I was possible to selectively separate water, methanol and acetic acid which were present in the aqueous phases, thus increasing the concentration of high value compounds such as ketones, phenols and furans in the residual fraction. The concentration of phenolic compounds in the residual fraction was 60% higher than the initial one in the aqueous phase. The oil phase mainly contained phenols, ketones and acids with high molecular weight. According to these results, these biomasses can be considered as a source of energy, fuels or chemicals, and it is possible to propose a methodology to upgrade the aqueous fractions in pyrolysis liquids.

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Characterization of biochars produced from pyrolysis of pelletized agricultural residues

Cited by 121 publications

References 25 publications

An Economical Evaluation of Anaerobic Digestion Plants Fed with Organic Agro-Industrial Waste

An Economical Evaluation of Anaerobic Digestion Plants Fed with Organic Agro-Industrial Waste

Effects of pyrolysis parameters on the yield and properties of biochar from pelletized sunflower husk

Pyrolytic conversion of perennial grasses and woody shrubs to energy and chemicals

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