Understanding the effect of dolomite additive on corrosion characteristics of straw biomass ash through experiment study and molecular dynamics calculations

Zheng, Liangqian; Jin, Jing; Zhang, Ruipu; Liu, Zhongyi; Zhang, Li

doi:10.1016/j.energy.2023.126950

Cited by 4 publications

(1 citation statement)

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“…Dolomite is characterized by its ability to adsorb substances on its surface, filter them through its pores, and facilitate ion exchange among its ore layers. The temperature increase in the layer is influenced by the decomposition of MgCO 3 and CaCO 3 from dolomite into MgO and CaO [47]. According to Chi et al [48], it was found that during the combustion of wheat straw, the bed temperature increased from 870 • C to 900 • C due to added dolomite.…”

Section: Combustion Tests Of Fbc and Optimal Parametersmentioning

confidence: 99%

Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed

Paulauskas,

Praspaliauskas,

Ambrazevičius

et al. 2024

Energies

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This study investigates the combustion of agricultural biomass rich in alkali elements in the fluidized bed. The experiments were performed with smashed corn cob in a 500 kW fluidized bed combustor which was designed for work under low bed temperatures (650–700 °C). During the experiments, the formed compounds from corn cob combustion were measured by sampling particulate matter, and mineral compositions were determined. Also, the temperature profile of the FBC was established. It was determined that the emissions of K and Na elements from the FBC increased from 4 to 7.3% and from 1.69 to 3%, respectively, changing the bed temperature from 650 to 700 °C. Though alkali emissions are reduced at a 650 °C bed temperature, CO emissions are higher by about 50% compared to the case of 700 °C. The addition of 3% of dolomite reduced the pollutant emissions and alkali emissions as well. Potassium content decreased by about 1% and 4%, respectively, at the bed temperatures of 650 °C and 700 °C. The NOx emissions were less than 300 mg/m3 and did not exceed the limit for medium plants regarding DIRECTIVE (EU) 2015/2193. During extended experiments lasting 8 h, no agglomeration of the fluidized bed was observed. Moreover, the proposed configuration of the FBC and its operational parameters prove suitable for facilitating the efficient combustion of agricultural biomass.

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Section: Combustion Tests Of Fbc and Optimal Parametersmentioning

confidence: 99%