To achieve the efficient conversion of lignin-derived phenolic compounds into high-value hydrocarbon fuels,a series of NiCo bimetallic catalysts with N-doped biochar and Al_(2)O_(3) composite supports(NiCo/NC-Al_(2)O_...To achieve the efficient conversion of lignin-derived phenolic compounds into high-value hydrocarbon fuels,a series of NiCo bimetallic catalysts with N-doped biochar and Al_(2)O_(3) composite supports(NiCo/NC-Al_(2)O_(3))were designed and synthesized in this study.Comprehensive characterizations(XRD,TEM,XPS,H_(2)-TPD)were conducted to reveal the superior catalytic activity in the HDO reaction of lignin-derived phenolic compounds.The optimized Ni_(8)Co_(2)/NC-Al_(2)O_(3) catalyst exhibits good metal dispersion and excellent hydrogen dissociation adsorption capacity.Under mild reaction conditions(240℃,1 MPa H_(2)),it achieves complete conversion of guaiacol and 99.9%selectivity of cyclohexane product,significantly outperforming the monometallic Ni10/NC-Al_(2)O_(3) and Co10/NC-Al_(2)O_(3) catalysts.Comparative studies indicate a synergistic effect between Ni and Co,where the introduction of Co effectively promotes the hydrogenation of aromatic rings and the cleavage of C-O bonds.This study elucidates the regulatory mechanism of the Ni-Co synergistic effect on catalytic performance,providing new insights for the development of efficient non-noble metals HDO catalysts.展开更多
This work presents a novel coordinated control strategy of a hybrid photovoltaic/battery energy storage(PV/BES) system. Different controller operation modes are simulated considering normal, high fluctuation and emerg...This work presents a novel coordinated control strategy of a hybrid photovoltaic/battery energy storage(PV/BES) system. Different controller operation modes are simulated considering normal, high fluctuation and emergency conditions. When the system is grid-connected, BES regulates the fluctuated power output which ensures smooth net injected power from the PV/BES system. In islanded operation, BES system is transferred to single master operation during which the frequency and voltage of the islanded microgrid are regulated at the desired level. PSCAD/EMTDC simulation validates the proposed method and obtained favorable results on power set-point tracking strategies with very small deviations of net output power compared to the power set-point. The state-of-charge regulation scheme also very effective with SOC has been regulated between 32% and 79% range.展开更多
基金Supported by the National Natural Science Foundation of China(52376217)Guangdong Natural Science Foundation(2024A1515011219)Guangzhou Science and Technology Plan Project(2025D04J0008)。
文摘To achieve the efficient conversion of lignin-derived phenolic compounds into high-value hydrocarbon fuels,a series of NiCo bimetallic catalysts with N-doped biochar and Al_(2)O_(3) composite supports(NiCo/NC-Al_(2)O_(3))were designed and synthesized in this study.Comprehensive characterizations(XRD,TEM,XPS,H_(2)-TPD)were conducted to reveal the superior catalytic activity in the HDO reaction of lignin-derived phenolic compounds.The optimized Ni_(8)Co_(2)/NC-Al_(2)O_(3) catalyst exhibits good metal dispersion and excellent hydrogen dissociation adsorption capacity.Under mild reaction conditions(240℃,1 MPa H_(2)),it achieves complete conversion of guaiacol and 99.9%selectivity of cyclohexane product,significantly outperforming the monometallic Ni10/NC-Al_(2)O_(3) and Co10/NC-Al_(2)O_(3) catalysts.Comparative studies indicate a synergistic effect between Ni and Co,where the introduction of Co effectively promotes the hydrogenation of aromatic rings and the cleavage of C-O bonds.This study elucidates the regulatory mechanism of the Ni-Co synergistic effect on catalytic performance,providing new insights for the development of efficient non-noble metals HDO catalysts.
文摘This work presents a novel coordinated control strategy of a hybrid photovoltaic/battery energy storage(PV/BES) system. Different controller operation modes are simulated considering normal, high fluctuation and emergency conditions. When the system is grid-connected, BES regulates the fluctuated power output which ensures smooth net injected power from the PV/BES system. In islanded operation, BES system is transferred to single master operation during which the frequency and voltage of the islanded microgrid are regulated at the desired level. PSCAD/EMTDC simulation validates the proposed method and obtained favorable results on power set-point tracking strategies with very small deviations of net output power compared to the power set-point. The state-of-charge regulation scheme also very effective with SOC has been regulated between 32% and 79% range.
