The spread of pine nematode disease caused by epidemic wood poses a great challenge to the environment,and there is an urgent need to develop effective processing methods;however,Ca/Fe-rich sludge ash can improve the ...The spread of pine nematode disease caused by epidemic wood poses a great challenge to the environment,and there is an urgent need to develop effective processing methods;however,Ca/Fe-rich sludge ash can improve the pyrolysis properties of biomass.Therefore,this paper focuses on the pyrolysis mechanism of epidemic wood with the addition of Ca/Fe-rich sludge ash.The presence of Ca-rich sludge ash was found to extend the pyrolytic temperature window of epidemic wood,intensify the cracking of its volatile constituents,and extend its reaction duration.At the same time,the Ca-rich sludge reduces the pyrolysis activation energy to 152.39 kJ/mol.The Fe-rich sludge ash demonstrated the capacity to lower the energy barriers during the initial phase of pyrolysis.Concurrently,the Ca-rich sludge ash accelerated the dehydration reaction of the epidemic wood,leading to 21.02%and 30.69%increases in the contents of acids and ketones in the pyrolytic oil,respectively.The Fe-rich sludge ash contributed to a notable 14.52%increase in aromatic compounds in the oil and a 19.14%decrease in alcoholic compounds.Additionally,the Ca-rich sludge ash accelerated the decomposition of lipid organic matter at elevated temperatures,enriching the pyrolytic char with more unsaturated bonds.This research lays a theoretical foundation for the safe and efficacious thermal decomposition of epidemic wood,thereby enhancing its utilization within the forestry industry.展开更多
基金supported by the Projects of Intergovernmental Cooperation of Science and Technology/National Key Research and Development Program of China(No.2024YFE0100200)the National Natural Science Foundation of China(No.52236008)+1 种基金the Zhejiang Provincial Natural Science Foundation(No.LZ23E060004)the National Natural Science Foundation of China(No.52206178).
文摘The spread of pine nematode disease caused by epidemic wood poses a great challenge to the environment,and there is an urgent need to develop effective processing methods;however,Ca/Fe-rich sludge ash can improve the pyrolysis properties of biomass.Therefore,this paper focuses on the pyrolysis mechanism of epidemic wood with the addition of Ca/Fe-rich sludge ash.The presence of Ca-rich sludge ash was found to extend the pyrolytic temperature window of epidemic wood,intensify the cracking of its volatile constituents,and extend its reaction duration.At the same time,the Ca-rich sludge reduces the pyrolysis activation energy to 152.39 kJ/mol.The Fe-rich sludge ash demonstrated the capacity to lower the energy barriers during the initial phase of pyrolysis.Concurrently,the Ca-rich sludge ash accelerated the dehydration reaction of the epidemic wood,leading to 21.02%and 30.69%increases in the contents of acids and ketones in the pyrolytic oil,respectively.The Fe-rich sludge ash contributed to a notable 14.52%increase in aromatic compounds in the oil and a 19.14%decrease in alcoholic compounds.Additionally,the Ca-rich sludge ash accelerated the decomposition of lipid organic matter at elevated temperatures,enriching the pyrolytic char with more unsaturated bonds.This research lays a theoretical foundation for the safe and efficacious thermal decomposition of epidemic wood,thereby enhancing its utilization within the forestry industry.
