Effect of Pyrolysis Temperature on Chemical and Surface Properties of Biochar of Rapeseed (<i>Brassica napus</i>L.)

Angın, Dilek; Şensöz, Sevgi

doi:10.1080/15226514.2013.856842

Cited by 104 publications

(42 citation statements)

References 36 publications

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“…The low temperature during the dry season may be associated with the decrease in the biomasses of organisms carrying less terrestrial organic matter to the reservoir and subsequently weakening the organic carbon storage. This viewpoint is supported by previous findings (Smith et al 2013;Angin and Sensoz 2014). As shown in Table 1, the mean grain sizes of sediments were lower during the rainy season (8.9-590.4 μm) than during the dry season (16.4-841.9 μm).…”

Section: Seasonal Variation Of Sediment Organic Carbonsupporting

confidence: 89%

Spatial and seasonal dynamics of organic carbon in physically fractioned sediments associated with dam construction in the middle Lancang-Mekong River

et al. 2015

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Purpose Dam construction alters hydrological conditions, impacting the sedimentary environment in the reservoir and modifying the regional flow of carbon. This study examined the spatial and seasonal dynamics of organic carbon in sizefractioned sediments to identify the role of physical protection (e.g. burial, aggregation) for preserving carbon and the potential impact of a dam on the mineralization of sedimentary organic carbon in the dammed Lancang-Mekong River. Materials and methods Sediment samples were collected from the Manwan Reservoir, China, in the rainy and dry seasons using a gravitational bottom sampler. One sample was collected from the centre of the river and two samples were collected on the river edges, 5 m away from each bank. Sediments were divided into three size classes of waterstable aggregates by wet sieving, including macroaggregates, microaggregates and silts. The total organic carbon (TOC), labile organic carbon (LOC), total nitrogen (TN) and stable carbon isotope (δ 13 C) were measured to analyse the dynamic features of organic carbon in the sediments. Results and discussion The preservation of organic carbon in the sediments collected from the main stream decreased with an increase in distance from the Manwan dam, while it remained consistently high in the tributaries. The majority of the sediments collected during the rainy season preserved more TOC and TN than the samples collected during the dry season. Because of the increase in the proportion of sands in macroaggregates and microaggregates, the TOC contents decreased. In contrast, silts and clays were not affected and performed well in protecting organic carbon. The sediments in the lacustrine area and forepart of the transition area, with lower δ 13 C and higher C/N values, suggested a mixture of aquatic and agro-ecosystem inputs and led to high proportions of LOC in TOC. Conclusions Dam construction reinforced the carbon sink and role of physical protection in the Manwan reservoir by enhancing fine fraction deposition and organic carbon inputs, especially during the rainy season. The sediments dominated by silts and clays absorbed and preserved more organic carbon than the samples dominated by sands. The majority of the organic carbon buried in the lacustrine area, the forepart of the transition area and the tributaries was protected by microaggregates, silts and clays. With the development of fisheries and agriculture, increasing amounts of labile organic carbon buried in sediments may lead to an increase in the potential for carbon mineralization.

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Section: Seasonal Variation Of Sediment Organic Carbonsupporting

confidence: 89%

Spatial and seasonal dynamics of organic carbon in physically fractioned sediments associated with dam construction in the middle Lancang-Mekong River

et al. 2015

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“…O biocarvão é produzido por meio da decomposição térmica de material orgânico sob alimentação limitada de oxigênio e temperaturas relativamente baixas (< 700 °C), assemelhando-se à produção de carvão para energia (Yang et al, 2007;Angin & Sensoz, 2014). Contudo, o biocarvão é direcionado para a aplicação no solo com o intuito de melhorar sua produtividade, além de promover o estoque de carbono.…”

Section: Introductionunclassified

Maximização do teor de carbono fixo em biocarvão aplicado ao sequestro de carbono

Róz

Ricardo

Nakashima

et al. 2015

Rev. bras. eng. agríc. ambient.

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<title>RESUMO</title><p>A emissão de dióxido de carbono é, atualmente, a principal causa do aquecimento global, devido ao efeito estufa. Ao redor do planeta pesquisadores têm-se esforçado na busca de soluções viáveis para o problema; com isto, o biocarvão está entre as mais recentes propostas de mitigação das mudanças climáticas em razão da sua simplicidade e eficiência. Desta forma, este trabalho teve, por objetivo, maximizar o teor de carbono fixo na produção de biocarvão. Para isso, analisaram-se sete tratamentos, temperaturas de pirólise: 200, 250, 300, 350, 400, 450 e 500 °C. A partir do rendimento gravimétrico de produção e do teor de carbono fixo calcularam-se os respectivos fatores de rendimento gravimétrico para cada tratamento, os quais indicam em qual temperatura se tem a maior quantidade de carbono fixo em função do biocarvão produzido. A pirólise com temperatura máxima de 300 °C indicou o maior fator de rendimento gravimétrico, atingindo 0,22672 C/biocarvão.</p>

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“…With the pyrolysis temperature increasing from 250 to 650 °C, the volatile content in the briquette charcoal decreased from 62.80% to 15.92% and the fixed carbon content increased from 33.40% to 75.43%; however, the change was not obvious at temperatures higher than 650 °C. The ash content was the non-volatile substance and non-combustible material in the charcoal (Angın and Şensöz 2014) and its content showed an increasing tendency due to the release of the volatile matters with increase in pyrolysis temperature. The HHVs of the briquette charcoals prepared at different pyrolysis temperatures are also (Amutio et al 2012).…”

Section: Properties Of the Briquette Charcoal Basic Analysis Of The Bmentioning

confidence: 99%

Pyrolysis Process and Characteristics of Products from Sawdust Briquettes

Yang¹,

Huang²,

Liu³

et al. 2016

BioResources

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The pyrolysis of briquettes made from biomass is an available and economic technological route for the production of briquette charcoal, but by-products (tar and gas) cannot be brought into full utilization, leading to the waste of resources and the addition of environmental concerns. Temperature is the most important parameter that affects the distributions and properties of briquette charcoal. This work investigated the three kinds of products of the pyrolysis of sawdust briquette in a fixed bed across a wide temperature range (250 to 950 °C). The purpose of this experiment was to study the pyrolysis process and the properties of the resulting products (briquette charcoal, liquid, and gas) of sawdust briquettes and explore the optimum operating temperature to generate good quality briquette charcoal, liquid, and gaseous products simultaneously. According to the results, the optimum pyrolysis temperature range was 450 to 650 °C, for which the briquette charcoal produced within this range had the highest calorific value (2,9.14 to 30.21 MJ/kg). Meanwhile, the liquid product is considered to be useful for liquid fuels or valuable chemical materials, and the low heating value of the gaseous product was 11.79 to 14.85 MJ/Nm 3 in this temperature range.

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Effect of Pyrolysis Temperature on Chemical and Surface Properties of Biochar of Rapeseed (Brassica napusL.)

Cited by 104 publications

References 36 publications

Spatial and seasonal dynamics of organic carbon in physically fractioned sediments associated with dam construction in the middle Lancang-Mekong River

Spatial and seasonal dynamics of organic carbon in physically fractioned sediments associated with dam construction in the middle Lancang-Mekong River

Maximização do teor de carbono fixo em biocarvão aplicado ao sequestro de carbono

Pyrolysis Process and Characteristics of Products from Sawdust Briquettes

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