Ash samples from corn stalk and coal co-fired at 0%,5%,10%,15%,20%,and 100%biomass were collected by a 4-stage wire-pipe type electrostatic precipitator (ESP),and the ratio of 14C/12C in ash samples from the 0%,20%,an...Ash samples from corn stalk and coal co-fired at 0%,5%,10%,15%,20%,and 100%biomass were collected by a 4-stage wire-pipe type electrostatic precipitator (ESP),and the ratio of 14C/12C in ash samples from the 0%,20%,and 100% co-firing scenarios were measured by an accelerator mass spectrometer.The differential capture efficiency in electrostatic fields for coal ash,coal/biomass co-combustion ash (co- ash),and pure biomass ash was studied separately based on the ratio 14C/12C.Other factors that may influence capture efficiency were analyzed,including microscopic morphology,resistivity,dust density, and particle size distribution.The results indicate that co-ash may be efficiently captured by ESP,while pure biomass ash could not.Co-ash capture was mainly concentrated in the first two electrostatic fields in the lab-scale ESP,and the overall capture efficiency exceeded 90%.Biomass addition decreased the resistivity of co-ash,and enhanced its surface adsorption capacity to form agglomerates,facilitating the capture of co-ash.The capture efficiency of coal ash in co-ash was higher than that of pure coal ash in the first electrostatic field of the ESP.Co-firing biomass can aid the removal of both coal ash and biomass ash when using an ESP.展开更多
The direct proton capture and resonance proton capture properties of stellar reactions 22Mg(p,γ)23Al and 26Si(p,γ)27P are studied by employing a mean-field potential obtained from the Skyrme-Hartree-Fock(SHF) model....The direct proton capture and resonance proton capture properties of stellar reactions 22Mg(p,γ)23Al and 26Si(p,γ)27P are studied by employing a mean-field potential obtained from the Skyrme-Hartree-Fock(SHF) model.Calculations with the SHF potential reproduce well the loosely-bound structure of the ground states as well as the widths of the resonant states in these nuclei.With the obtained potential we estimate the reaction rates of direct proton capture and resonance proton capture to nuclei 23Al and 27P.The effect of the 27P loosely-bound structure on the S factor of the direct proton capture is also discussed.展开更多
基金the National Natural Science Foundation of China (Grant No.51376063).
文摘Ash samples from corn stalk and coal co-fired at 0%,5%,10%,15%,20%,and 100%biomass were collected by a 4-stage wire-pipe type electrostatic precipitator (ESP),and the ratio of 14C/12C in ash samples from the 0%,20%,and 100% co-firing scenarios were measured by an accelerator mass spectrometer.The differential capture efficiency in electrostatic fields for coal ash,coal/biomass co-combustion ash (co- ash),and pure biomass ash was studied separately based on the ratio 14C/12C.Other factors that may influence capture efficiency were analyzed,including microscopic morphology,resistivity,dust density, and particle size distribution.The results indicate that co-ash may be efficiently captured by ESP,while pure biomass ash could not.Co-ash capture was mainly concentrated in the first two electrostatic fields in the lab-scale ESP,and the overall capture efficiency exceeded 90%.Biomass addition decreased the resistivity of co-ash,and enhanced its surface adsorption capacity to form agglomerates,facilitating the capture of co-ash.The capture efficiency of coal ash in co-ash was higher than that of pure coal ash in the first electrostatic field of the ESP.Co-firing biomass can aid the removal of both coal ash and biomass ash when using an ESP.
基金Supported by the Major State Basic Research Development Program (Grant No.2007CB815000)the National Natural Science Foundation of China (Grant Nos.10525520,10735010,10875172,and J0730316)the Mao Yu-Gang Scientific Research Foundation
文摘The direct proton capture and resonance proton capture properties of stellar reactions 22Mg(p,γ)23Al and 26Si(p,γ)27P are studied by employing a mean-field potential obtained from the Skyrme-Hartree-Fock(SHF) model.Calculations with the SHF potential reproduce well the loosely-bound structure of the ground states as well as the widths of the resonant states in these nuclei.With the obtained potential we estimate the reaction rates of direct proton capture and resonance proton capture to nuclei 23Al and 27P.The effect of the 27P loosely-bound structure on the S factor of the direct proton capture is also discussed.
