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

作　　者：Nallagatla Vinod Kumar Gajanan Sawargaonkar C.Sudha Rani Rajesh Pasumarthi Santhosh Kale T.Ram Prakash S.Triveni Ajay Singh Moses Shyam Davala Rohan Khopade Rayapati Karthik Bathula Venkatesh Mandapelli Sharath Chandra 

机构地区：[1]Department of Agronomy,College of Agriculture,Professor Jayashankar Telangana State Agricultural University PJTSAU,Rajendranagar,Hyderabad 500030,India [2]International Crops Research Institute for the Semi-Arid Tropics,Patancheru,Hyderabad 502324,India [3]Agricultural Research Station,Jayashankar Telangana State Agricultural University PJTSAU,Vikarabad,Tan-duru,Professor,India [4]AICRP On Weed Control,Professor Jayashankar Telan-gana State Agricultural University PJTSAU,Rajendranagar,Hyderabad 500030,India [5]Department of Agricultural Microbiology and Bio-Energy,College of Agriculture,Professor Jayashankar Telangana State Agricultural University PJTSAU,Rajendranagar,Hyderabad 500030,India [6]IFS,Rajendranagar,PJTSAU,Hyderabad 500030,India.

出　　处：《Bioresources and Bioprocessing》2024年第1期53-71,共19页生物资源与生物加工(英文)

摘　　要：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 C

关 键 词：Slow pyrolysis Carbon sequestration MAIZE PIGEONPEA Energetic retention efficiency Reduction potential 

分 类 号：S15[农业科学—土壤学]