Bio-oil is a major product from pyrolysis of biomass which serves as a carbon source to produce carbon material due to its high reactivity towards polymerization itself or cross-polymerization with other organic feeds...Bio-oil is a major product from pyrolysis of biomass which serves as a carbon source to produce carbon material due to its high reactivity towards polymerization itself or cross-polymerization with other organic feedstocks.In this study,activation of polyaniline(PANI)mixed with wheat straw-derived bio-oil and K2C2O4 at 800°C was conducted,aiming to understand the effect of potential interactions of bio-oil with PANI on pore development of resulting activated carbon(AC).The results revealed cross-polymerization reactions between PANI and bio-oil during direct activation,which increased the yield of AC from 13.0%(calculated average)to 15.0%,the specific surface area from 1677.9 m^(2) g^(-1)(calculated average)to 1771.3 m^(2) g^(-1),and the percentage of micropores from 94.3%to 97.1%.In addition,pre-polymerization of PANI and bio-oil at 200°C before activation was also conducted.Such pretreatment could increase the AC yield from 13.0% to 23.3%,but the specific surface area decreased to 1381.8 m^(2) g^(-1).The pre-polymerization formed the organics that were more resistant towards cracking/gasification,but introduced oxygen-rich functionalities.This made AC highly hydrophilic,rendering a much higher capability for adsorption of phenol despite the smaller specific surface area.Additionally,the AC with developed pore structures facilitated dispersion of nickel in Ni/AC and enhanced the catalytic activity for hydrogenation of o-chloronitrobenzene and vanillin.展开更多
基金This work was supported by the National Natural Science Foundation of China(No.52276195)the Program for supporting innovative research from Jinan(202228072)the Program of agricultural development from Shandong(SD2019NJ015).
文摘Bio-oil is a major product from pyrolysis of biomass which serves as a carbon source to produce carbon material due to its high reactivity towards polymerization itself or cross-polymerization with other organic feedstocks.In this study,activation of polyaniline(PANI)mixed with wheat straw-derived bio-oil and K2C2O4 at 800°C was conducted,aiming to understand the effect of potential interactions of bio-oil with PANI on pore development of resulting activated carbon(AC).The results revealed cross-polymerization reactions between PANI and bio-oil during direct activation,which increased the yield of AC from 13.0%(calculated average)to 15.0%,the specific surface area from 1677.9 m^(2) g^(-1)(calculated average)to 1771.3 m^(2) g^(-1),and the percentage of micropores from 94.3%to 97.1%.In addition,pre-polymerization of PANI and bio-oil at 200°C before activation was also conducted.Such pretreatment could increase the AC yield from 13.0% to 23.3%,but the specific surface area decreased to 1381.8 m^(2) g^(-1).The pre-polymerization formed the organics that were more resistant towards cracking/gasification,but introduced oxygen-rich functionalities.This made AC highly hydrophilic,rendering a much higher capability for adsorption of phenol despite the smaller specific surface area.Additionally,the AC with developed pore structures facilitated dispersion of nickel in Ni/AC and enhanced the catalytic activity for hydrogenation of o-chloronitrobenzene and vanillin.
