Study of briquetted biomass co-firing mode in power plants

Liu, Yuanyi; Wang, Xuebin; Xiong, Yongmin; Tan, Houzhang; Niu, Yanqing

doi:10.1016/j.applthermaleng.2013.10.041

Cited by 26 publications

(14 citation statements)

References 20 publications

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“…Therefore, the financially viable straw collection radius will vary for each power station, depending on local conditions. Research suggests that a wide range of radii are possible, from 20 km (Minchener, ; Zhang et al ., ) up to 40 or 50 km (Liu & Huang, ; Thomas et al ., ; Liu et al ., ). Given this level of uncertainty, we present technical cofiring potentials for both 20 km and 50 km straw collection radii.…”

Section: Methodsmentioning

confidence: 97%

“…Literature estimates of the capital costs of converting coal‐fired power stations to cofiring capability vary from zero costs (where biomass is briquetted before cofiring; Liu et al ., ) to between $59–426 kW −1 installed biomass capacity (US Dept. of Energy, ; Al‐Mansour & Zuwala, ).…”

Section: Methodsmentioning

confidence: 99%

“…This restriction effectively rules out the cofiring of agricultural residues in existing coal‐fired power stations, because cofiring biomass with high ash contents (such as agricultural residues) tends only to be technically feasible when ~10% of the coal feedstock is offset on an energy replacement basis (Al‐Mansour & Zuwala, ; Tumuluru et al ., ; IEA, ), due to the risks of fouling and slagging associated with ash build‐up. This reticence to support cofiring at lower energy replacement ratios stems in part from perceived difficulties in verifying the ratio of cofired biomass at the coal‐fired power stations, and thus calculating the level of subsidy to award to each producer (Dong, ; Liu et al ., ; Gosens, ). However, there remains significant interest in the concept of cofiring in China, with a variety of scoping projects commissioned through international partnerships (DECC, ; Minchener, ), government‐funded demonstration plants in Shandong and Shaanxi provinces (Liu et al ., ) and various research studies reporting that cofiring agricultural residues in China can be both technically feasible and financially viable (Lu & Zhang, ; Wang et al ., ; Liu et al ., ).…”

Section: Introductionmentioning

confidence: 98%

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Should China subsidize cofiring to meet its 2020 bioenergy target? A spatio‐techno‐economic analysis

et al. 2015

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China has developed ambitious bioenergy installation targets as part of its broader goals to increase its renewable energy-generating capacity and decarbonize its economy. A key target feedstock for bioenergy is the 800 million tonnes of agricultural residues that China produces each year. At present, the main financial incentive to support bioenergy generation from agricultural residues is a feed-in-tariff provided for bioenergy that is produced by units that take 80% or more of their feedstock energy from biomass. Although this policy has catalysed the construction of many bioenergy units, there are reports that these projects are experiencing serious financial and technical problems, leading to low operational efficiency and even closure. An alternative option for China's agricultural residues is cofiring with coal in existing power stations. However, this is currently unprofitable for power station operators, as cofiring is not eligible for financial assistance through the bioenergy feed-in-tariff. In the light of China's ambitious target to install 30GW of bioenergy generation capacity by 2020, this study investigates the extent to which extension of the bioenergy feed-in-tariff to include cofiring could contribute towards this goal. The results suggest that 39% of China's straw energy resources are located within 50 km of a power station. Assuming cofiring ratios of up to 10% coal energy replacement, an annual 89-117TWh of electricity could be generated by cofiring agricultural residues collected within 50 km radii of power stations. If China extends its bioenergy subsidies to include cofiring, an annual 62-92TWh can be produced at an internal rate of return of 8% or more. This equates to 42-62% of the bioenergy generation that China might expect if it met its 2020 target of installing 30GW of bioenergy capacity. Overall, this indicates a strong case for the Chinese government to extend its existing bioenergy feed-in-tariff to include cofiring at low energy replacement ratios.

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Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Should China subsidize cofiring to meet its 2020 bioenergy target? A spatio‐techno‐economic analysis

et al. 2015

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“…The economic pillar is one of the most studied, so there is a lot of information available on it. For example, [21][22] [23] gives information about E1. The indicator E2 is treated in [23].…”

Section: Economic Indicatorsmentioning

confidence: 99%

Indicators for assessing sustainability of power plants: environmental, social, economic and technical aspects

Cartelle¹,

Lara²,

Cruz³

et al. 2015

REPQJ

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The public is increasingly aware of the problems caused by unbridled development. More and more, governments, companies and other organisations are establishing sustainable development policies for making more likely that future generations can satisfy their own needs.A set of environmental, social, economic and technical-functional indicators are proposed and described here. These indicators are useful to create complete models for assessing the global sustainability of renewable and non-renewable power plants throughout their life cycles.This set of indicators can be useful for engineers, researchers and, in general, decision makers in the energy policy field. This is the first step to achieve more sustainable energy mixes.

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“…Also, the amount of oxygen required for the combustion can be well matched with the amount of oxygen diffused from the outside, which positively affects the effectiveness of lateral fuel spreading and evenness of volatile matter release during combustion. This induces less combustion-wave and tends to be more stable during the burning process (Chirone et al 2008;Roy et al 2013;Liu et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Co-Combustion Characteristics and Kinetic Analyses of Biomass Briquette and Municipal Solid Waste in N2/O2 and CO2/O2 Atmospheres

et al. 2017

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The thermal behavior of cotton straw briquette (CSB), municipal solid waste (MSW), and their blends was investigated using a thermogravimetric analyzer under N2/O2 and CO2/O2 atmospheres at 20 °C/min from an ambient temperature to 1000 °C. The kinetics and synergistic interaction between MSW and CSB in the co-combustion process were evaluated. The results indicated that MSW blended with CSB improved the ignition and burnout characteristics of the blends, while decreasing the comprehensive combustion characteristics index. The suitable proportions of CSB were less than 60% and 40% separately under 80N2/20O2 and 80CO2/20O2 atmospheres, respectively. The inhibitory effect of CO2 induced burnout temperature and residual mass increased, and the high-temperature stage reaction varied. Kinetic analysis of the blends indicated that blending with CSB could promote MSW combustion in the first reaction stage, while the second and third decomposition stages were complicated because of the synergistic interaction between MSW and CSB in the co-combustion process. The nth order reaction model fit the mass loss of theca-combustion process for the blends very well.

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Study of briquetted biomass co-firing mode in power plants

Cited by 26 publications

References 20 publications

Should China subsidize cofiring to meet its 2020 bioenergy target? A spatio‐techno‐economic analysis

Should China subsidize cofiring to meet its 2020 bioenergy target? A spatio‐techno‐economic analysis

Indicators for assessing sustainability of power plants: environmental, social, economic and technical aspects

Co-Combustion Characteristics and Kinetic Analyses of Biomass Briquette and Municipal Solid Waste in N2/O2 and CO2/O2 Atmospheres

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