Blue-coke is a kind of char obtained by the low temperature pyrolysis of non-caking or weakly-caking coal with high volatile matter.It is generally granular with high reactivity,high electrical resistivity and high in...Blue-coke is a kind of char obtained by the low temperature pyrolysis of non-caking or weakly-caking coal with high volatile matter.It is generally granular with high reactivity,high electrical resistivity and high in fixed carbon but low in ash,sulfur,aluminum and phosphorus content.It has low price and extensive application decided by the raw coal and the production technology.This paper reviews pyrolysis reactor,process principle,technology characteristic and application state of blue-coke production technology in China.It includes vertical oven technology,rotary kiln technology and rotary-hearth furnace technology with external-heating,and vertical oven technology,rotary-disc furnace technology and conveyor-belt furnace technology with internal-heating.According to the existing problems in industrial blue-coke production technology,perspectives in terms of dust removal from volatiles,coke quenching and breakthrough of pyrolysis technology are given.展开更多
Here we report a vapor-phase reaction approach to fabricate rhodium(I)-dodecanethiol complex coated on carbon fiber cloth(Rh(I)-SC_(12)H_(25)/CFC),followed by low-temperature pyrolysis to achieve dodecanethiol modifie...Here we report a vapor-phase reaction approach to fabricate rhodium(I)-dodecanethiol complex coated on carbon fiber cloth(Rh(I)-SC_(12)H_(25)/CFC),followed by low-temperature pyrolysis to achieve dodecanethiol modified Rh(Rh@SC_(12)H_(2)5/CFC)for electrocatalytic nitrogen reduction reaction(NRR).The results demonstrate that after pyrolysis for 0.5 h at 150℃,the obtained Rh@SC_(12)H_(2)5/CFC-0.5 exhibits excellent NRR activity with an NH3 yield rate of 121.2±6.6μg∙h^(−1)∙cm^(−2)(or 137.7±7.5μg∙h^(−1)∙mgRh^(−1))and a faradaic efficiency(FE)of 51.6%±3.8%at−0.2 V(vs.RHE)in 0.1 M Na_(2)SO_(4).The theoretical calculations unveil that the adsorption of dodecanethiol on the hollow sites of Rh(111)plane is thermodynamically favorable,effectively regulating the electronic structure and surface wettability of metallic Rh.Importantly,the dodecanethiol modification on Rh(111)obviously decreases the surface H*coverage,thus inhibiting the competitive hydrogen evolution reaction and concurrently reducing the electrocatalytic NRR energy barrier.展开更多
文摘Blue-coke is a kind of char obtained by the low temperature pyrolysis of non-caking or weakly-caking coal with high volatile matter.It is generally granular with high reactivity,high electrical resistivity and high in fixed carbon but low in ash,sulfur,aluminum and phosphorus content.It has low price and extensive application decided by the raw coal and the production technology.This paper reviews pyrolysis reactor,process principle,technology characteristic and application state of blue-coke production technology in China.It includes vertical oven technology,rotary kiln technology and rotary-hearth furnace technology with external-heating,and vertical oven technology,rotary-disc furnace technology and conveyor-belt furnace technology with internal-heating.According to the existing problems in industrial blue-coke production technology,perspectives in terms of dust removal from volatiles,coke quenching and breakthrough of pyrolysis technology are given.
基金supported by the National Natural Science Foundation of China(No.51872292)the young project of Anhui Provincial Natural Science Foundation(No.1908085QB83).
文摘Here we report a vapor-phase reaction approach to fabricate rhodium(I)-dodecanethiol complex coated on carbon fiber cloth(Rh(I)-SC_(12)H_(25)/CFC),followed by low-temperature pyrolysis to achieve dodecanethiol modified Rh(Rh@SC_(12)H_(2)5/CFC)for electrocatalytic nitrogen reduction reaction(NRR).The results demonstrate that after pyrolysis for 0.5 h at 150℃,the obtained Rh@SC_(12)H_(2)5/CFC-0.5 exhibits excellent NRR activity with an NH3 yield rate of 121.2±6.6μg∙h^(−1)∙cm^(−2)(or 137.7±7.5μg∙h^(−1)∙mgRh^(−1))and a faradaic efficiency(FE)of 51.6%±3.8%at−0.2 V(vs.RHE)in 0.1 M Na_(2)SO_(4).The theoretical calculations unveil that the adsorption of dodecanethiol on the hollow sites of Rh(111)plane is thermodynamically favorable,effectively regulating the electronic structure and surface wettability of metallic Rh.Importantly,the dodecanethiol modification on Rh(111)obviously decreases the surface H*coverage,thus inhibiting the competitive hydrogen evolution reaction and concurrently reducing the electrocatalytic NRR energy barrier.
