Specialized concrete made of processed biomass ash: lightweight, self-compacting, and geopolymeric concrete

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

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Investigation of Ash Deposition Dynamic Process in an Industrial Biomass CFB Boiler Burning High-Alkali and Low-Chlorine Fuel

Energies ◽

10.3390/en13051092 ◽

2020 ◽

Vol 13 (5) ◽

pp. 1092

Author(s):

Hengli Zhang ◽

Chunjiang Yu ◽

Zhongyang Luo ◽

Yu’an Li

Keyword(s):

Gas Flow ◽

Circulating Fluidized Bed ◽

Deposition Process ◽

Biomass Combustion ◽

Ash Deposition ◽

Biomass Ash ◽

Cfb Boiler ◽

Third Stage ◽

Ash Deposit ◽

High Alkali

The circulating fluidized bed (CFB) boiler is a mainstream technology of biomass combustion generation in China. The high flue gas flow rate and relatively low combustion temperature of CFB make the deposition process different from that of a grate furnace. The dynamic deposition process of biomass ash needs further research, especially in industrial CFB boilers. In this study, a temperature-controlled ash deposit probe was used to sample the deposits in a 12 MW CFB boiler. Through the analysis of multiple deposit samples with different deposition times, the changes in micromorphology and chemical composition of the deposits in each deposition stage can be observed more distinctively. The initial deposits mainly consist of particles smaller than 2 μm, caused by thermophoretic deposition. The second stage is the condensation of alkali metal. Different from the condensation of KCl reported by most previous literatures, KOH is found in deposits in place of KCl. Then, it reacts with SO2, O2 and H2O to form K2SO4. In the third stage, the higher outer layer temperature of deposits reduces the condensation rate of KOH significantly. Meanwhile, the rougher surface of deposits allowed more calcium salts in fly ash to deposit through inertial impact. Thus, the elemental composition of deposits surface shows an overall trend of K decreasing and Ca increasing.

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Challenges and opportunities in biomass ash management and its utilization in novel applications

Renewable and Sustainable Energy Reviews ◽

10.1016/j.rser.2021.111451 ◽

2021 ◽

Vol 150 ◽

pp. 111451

Author(s):

Muhammad Assad Munawar ◽

Asif Hussain Khoja ◽

Salman Raza Naqvi ◽

Muhammad Taqi Mehran ◽

Muhammad Hassan ◽

...

Keyword(s):

Biomass Ash ◽

Challenges And Opportunities ◽

Novel Applications

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Mobility of biomass ash constituents as influenced by pretreatment and soil – An artificial weathering study

Waste Management ◽

10.1016/j.wasman.2020.12.014 ◽

2021 ◽

Vol 121 ◽

pp. 186-197

Author(s):

Erwin Rehl ◽

Kerry B. Reimer ◽

P. Michael Rutherford

Keyword(s):

Biomass Ash ◽

Artificial Weathering

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SO2 Absorption by Multiple Biomass Ash Types

ACS Omega ◽

10.1021/acsomega.0c04364 ◽

2021 ◽

Vol 6 (3) ◽

pp. 1872-1882

Author(s):

Tianhao Fei ◽

Liqiang Zhang

Keyword(s):

Biomass Ash ◽

So2 Absorption

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Comparing ameliorative effects of biomass ash and alkaline slag on an acidic Ultisol under artificial Masson pine: A field experiment

Journal of Environmental Management ◽

10.1016/j.jenvman.2021.113306 ◽

2021 ◽

Vol 297 ◽

pp. 113306

Author(s):

Renyong Shi ◽

Hongwei Lai ◽

Ni Ni ◽

Jackson Nkoh Nkoh ◽

Peng Guan ◽

...

Keyword(s):

Field Experiment ◽

Biomass Ash ◽

Masson Pine ◽

Alkaline Slag

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Study on fusion characteristics of biomass ash

Bioresource Technology ◽

10.1016/j.biortech.2010.06.144 ◽

2010 ◽

Vol 101 (23) ◽

pp. 9373-9381 ◽

Cited By ~ 105

Author(s):

Yanqing Niu ◽

Hongzhang Tan ◽

Xuebin Wang ◽

Zhengning Liu ◽

Haiyu Liu ◽

...

Keyword(s):

Biomass Ash

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Effects of biomass ash, bone meal, and alkaline slag applied alone and combined on soil acidity and wheat growth

Journal of Soils and Sediments ◽

10.1007/s11368-017-1673-9 ◽

2017 ◽

Vol 17 (8) ◽

pp. 2116-2126 ◽

Cited By ~ 7

Author(s):

Ren-yong Shi ◽

Jiu-yu Li ◽

Ni Ni ◽

Khalid Mehmood ◽

Ren-kou Xu ◽

...

Keyword(s):

Soil Acidity ◽

Bone Meal ◽

Biomass Ash ◽

Wheat Growth ◽

Alkaline Slag

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Biomass Ash – Bed Material Interactions Leading to Agglomeration in FBC

17th International Conference on Fluidized Bed Combustion ◽

10.1115/fbc2003-150 ◽

2003 ◽

Cited By ~ 5

Author(s):

H. J. M. Visser ◽

S. C. van Lith ◽

J. H. A. Kiel

Keyword(s):

Coating Thickness ◽

Problem Area ◽

Critical Conditions ◽

Fluidized Bed Combustion ◽

Biomass Ash ◽

Fundamental Study ◽

Fluidization Velocity ◽

Bubbling Fluidized Bed ◽

Bed Agglomeration ◽

Bed Material

In (bubbling) fluidized-bed combustion and gasification of biomass, several potential problems are associated with the inorganic components of the fuel. A major problem area is de-fluidization due to bed agglomeration. The most common found process leading to de-fluidization in commercial-scale installations is “coating-induced” agglomeration. During reactor operation, a coating is formed on the surface of bed material grains and at certain critical conditions (e.g., coating thickness or temperature) sintering of the coatings initiates the agglomeration. In an experimental approach, this work describes a fundamental study on the mechanisms of de-fluidization. For the studied process of bed de-fluidization due to sintering of grain-coating layers, it was found that the onset of the process depends on: a) a critical coating thickness, b) on the fluidization velocity when it is below approx. four times the minimum fluidization velocity and c) on the viscosity (stickiness) of the outside of the grains (coating).

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