Co-combustion performance and kinetic study of solid digestate with gasification biochar

Barbanera, Marco; Cotana, Franco; Matteo, Umberto Di

doi:10.1016/j.renene.2018.01.076

Cited by 75 publications

(17 citation statements)

References 43 publications

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“…Owing to properties that make it a clean and renewable fuel, it is feasible to explore efficient methods, such as densification, to upgrade straw char into high value-added bioenergy (Hu et al, 2015). The widespread use of straw char requires the development of adequate utilization strategies to achieve economic and environmental sustainability of bioenergy chains (Barbanera et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the performance of honeycomb briquettes produced from semi-coke and corn stover char: Co-combustion, emission characteristics, and a value-chain model for rural China

Cong

Zhao

Mašek

et al. 2020

Journal of Cleaner Production

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A honeycomb briquette made from semi-coke and corn stover char was developed as a possible heating fuel in rural China. In this study, the cocombustion characteristics of semi-coke and corn stover char combined in different proportions were tested and analyzed. It was determined that adding 20 % corn stover char (BS28) effectively improved the combustion performance of semi-coke, and this proportion was regarded as the ideal mixing ratio. Thus, the integrated combustion characteristics of the blend improved to 15.0810 -12 K -3 •min -2 compared to 5.4410 -12 K -3 •min -2 for semi-coke alone. The emission test results revealed that SO2 and PM2.5 emissions decreased with corn stover char addition; however, NOX emissions increased and the combustion efficiency decreased slightly with corn stover char addition. The SO2 concentrations resulting from the combustion of BriqCK, Briq28, and Briq46 (honeycomb briquettes with ratios of char to semi-coke of 0:10, 2:8, and 4:6, respectively) under different experimental conditions were 24.9-26.3, 9.5-16.7, and 5.2-15.4 mg/Nm 3 , respectively, and the NOX concentrations were 63. 1-149.7, 54.3-175.4, and 57.7-168.4 mg/Nm 3 , respectively. A value-chain model for the new heating fuel was developed and possible benefits were analyzed. If either the new investment cost or raw material input costs ($25 USD/t of straw char) were subsidized by national public finance, then the project would be profitable and run sustainably.This study provided an important technical basis for the development and application of new heating fuels in China.

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Section: Introductionmentioning

confidence: 99%

Evaluating the performance of honeycomb briquettes produced from semi-coke and corn stover char: Co-combustion, emission characteristics, and a value-chain model for rural China

Cong

Zhao

Mašek

et al. 2020

Journal of Cleaner Production

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“…For this reason, the ash content can only be compared approximately. For example, in Barbanera and Cotana [27], the ash content in the dry matter of the digestate was 12.38%, whereas in the sample digestate we analyzed, 11.31% ash was found. Similar values were found in safflower seed (3.0%) [28], sunflower peel (2.7%) [29], and wheat straw (6.72%) [30].…”

Section: Resultsmentioning

confidence: 72%

Characteristic Properties of Alternative Biomass Fuels

et al. 2020

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Biomass is one of the most promising renewable energy sources because it enables energy accumulation and controlled production. With this, however, the demand for biofuels grows and thus there is an effort to expand their portfolio. Nevertheless, to use a broader range of biofuels, it is necessary to know their fuel properties, such as coarse and elemental analysis, or lower heating value. This paper presents the results of testing the fuel properties of several new, potentially usable biofuels, such as quinoa, camelina, crambe, and safflower, which are compared with some traditional biofuels (wood, straw, sorrel, hay). Moreover, the results of the determination of water content, ash, and volatile combustible content of these fuels are included, along with the results of the elemental analysis and the determination of higher and lower heating values. Based on these properties, it is possible to implement designs of combustion plants of different outputs for these fuels.

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“…The TG and DTG profiles for feedstocks and their hydrochars are displayed in Figure . As seen from Figure a, the initial mass loss of SS occurs from 50 to 150 °C (stage A) and is mainly caused by the release of moisture . Without considering the stage of dehydration (stage A), SS experienced two major mass loss processes (stages B and C).…”

Section: Results and Discussionmentioning

confidence: 99%

Synergistic Characteristics and Capabilities of Co-hydrothermal Carbonization of Sewage Sludge/Lignite Mixtures

Song

Zhan²,

Zhuang

et al. 2019

Energy Fuels

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Co-hydrothermal carbonization (co-HTC) has been reported as a potential technology for enhancing fuel qualities and subsequent combustion behaviors of high-moisture raw biowastes or coals. For the purpose of real energy utilization, two low-fuel-quality materials, sewage sludge (SS, a biowaste) and lignite (LC, a coal), were employed to explore the characteristics and capabilities of target hydrochars produced from co-HTC of their mixture (1:1 mass ratio) in a temperature range from 120 to 300 °C. The results demonstrated that the hydrochars exhibited excellent synergistic characteristics, such as more fixed carbon, less volatile matter, an enhanced higher heating value, and an improved coalification degree (lower O/C and H/C ratios), which was probably explained by the involved dehydration, decarboxylation, and aromatization reactions enhanced by the mutual interactions between SS and LC during the co-HTC process. Furthermore, the combustion of hydrochars was observed to have maximal synergistic capabilities at approximately 240 °C, with a corresponding deviation value of −21.96% and a comprehensive combustion index of 10.28 × 10–8 min–2 °C–3. These findings, which are related to the synergistic effects of the co-HTC technique, could indicate a feasible approach for the effective energy utilization of low-fuel-quality raw biowastes or coals.

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Co-combustion performance and kinetic study of solid digestate with gasification biochar

Cited by 75 publications

References 43 publications

Evaluating the performance of honeycomb briquettes produced from semi-coke and corn stover char: Co-combustion, emission characteristics, and a value-chain model for rural China

Evaluating the performance of honeycomb briquettes produced from semi-coke and corn stover char: Co-combustion, emission characteristics, and a value-chain model for rural China

Characteristic Properties of Alternative Biomass Fuels

Synergistic Characteristics and Capabilities of Co-hydrothermal Carbonization of Sewage Sludge/Lignite Mixtures

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