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Harnessing the potential of pigeonpea and maize feedstock biochar for carbon sequestration, energy generation, and environmental sustainability

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Relation http://oar.icrisat.org/12465/
https://link.springer.com/article/10.1186/s40643-023-00719-3
https://doi.org/10.1186/s40643-023-00719-3
 
Title Harnessing the potential of pigeonpea and maize feedstock biochar for carbon sequestration, energy generation, and environmental sustainability
 
Creator Kumar, N V
Sawargaonkar, G L
Rani, C S
Pasumarthi, R
Kale, S
Prakash, T R
Triveni, S
Singh, A
Davala, M S
Khopade, R
Karthik, R
Venkatesh, B
Chandra, M S
 
Subject Pigeonpea
Maize
 
Description Crop residues in agriculture pose disposal challenges and contribute to air pollution when burned. This study aims
to use pigeonpea and maize stalks to produce biochar at different pyrolysis temperatures. Biochar can serve in carbon sequestration, as a soil amendment, and as an alternative fuel source. Pyrolysis was conducted at 400, 500, and 600 °C to examine the effects on physicochemical properties, fuel, and energy related properties. Increase in temperatures resulted in decrease of biochar yield, volatile matter, and O/C and H/C atomic ratios, while ash content and essential nutrients increased. Yield was observed to be higher in pigeonpea stalks derived biochar compared to maize stalks derived biochar at same pyrolysis temperatures. The yields of pigeonpea stalks derived biochar at 400 °C, 500 °C, and 600 °C are 34, 33 and 29%, respectively, and the yields of maize biomass-derived biochar at 400 °C, 500 °C,
and 600 °C are 29, 28, and 26%, respectively. The organic carbon content is found to be higher in the biochar samples
prepared at 600 °C, i.e., 10.44%, and 10.39% for pigeonpea and maize-derived biochar, respectively. The essential
elements of biochar were increased with an increase in pyrolysis temperature except nitrogen which is conversely
related to temperature. The biochar obtained through pyrolysis at 400 °C demonstrated superior characteristics
compared to biochar produced at other temperatures. It exhibited a higher biochar yield, with approximately 84.60%
for pigeonpea and 64.85% for maize fixed carbon content. Additionally, the energy retention efficiency was higher,
reaching 67.33% for pigeonpea and 42.70% for maize-derived biochar at a pyrolysis temperature of 400 °C. The fixed
carbon recovery efficiency was also notable at around 200.44% for PPS and 142.37% for maize biochar which is higher compared to biochar produced at other temperatures. Furthermore, the higher heating value (HHV) was approximately 30.75 MJ kg−1 for both the biochars, indicating their suitability as alternative solid fuels. A significant CO2 reduction potential of 84 CO2 eq kg−1 and 55 CO2 eq kg−1 was observed for pigeonpea and maize biochar, respectively. Hence, biochar is a promising and effective option for carbon sequestration, offering environmental benefits.
 
Publisher SpringerOpen
 
Date 2024-01-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_by
 
Identifier http://oar.icrisat.org/12465/1/Bioresources%20and%20Bioprocessing_11_1-19_2024.pdf
Kumar, N V and Sawargaonkar, G L and Rani, C S and Pasumarthi, R and Kale, S and Prakash, T R and Triveni, S and Singh, A and Davala, M S and Khopade, R and Karthik, R and Venkatesh, B and Chandra, M S (2024) Harnessing the potential of pigeonpea and maize feedstock biochar for carbon sequestration, energy generation, and environmental sustainability. Bioresources and Bioprocessing, 11. pp. 1-19. ISSN 2197-4365