The co-cracking of natural gas and coal by a 15kW nitrogen(N2 flux:2m3·h-1) thermal plasma jet was investigated experimentally.For comparing with the cracking natural gas or coal separately, the experiments were ...The co-cracking of natural gas and coal by a 15kW nitrogen(N2 flux:2m3·h-1) thermal plasma jet was investigated experimentally.For comparing with the cracking natural gas or coal separately, the experiments were arranged as following: （1）Cracking of natural gas;（2）Cracking of coal;（3）Co-cracking of natural gas and coal.Under the same experimental conditions, especially the same power, the experiments show that co-cracking can lead to more output of acetylene and ethylene, even more than the sum of that from（1）and（2）.The analysis shows that,during the co-cracking process, the natural gas and the coal both acquire the effect of cracking separately; the surplus output may probably be resulted from the interaction of hydrogen and carbon. Here, the hydrogen is resulted from cracking of natural gas and the carbon——from cracking of coal.展开更多
Developing advanced porous materials possessing both a high storage capacity and selectivity for acetylene(C_(2)H_(2))remains challenging but a sought-after endeavor.Herein we show a strategy involving synergic combin...Developing advanced porous materials possessing both a high storage capacity and selectivity for acetylene(C_(2)H_(2))remains challenging but a sought-after endeavor.Herein we show a strategy involving synergic combination of spatial confinement and commensurate stacking for enhanced C_(2)H_(2)storage and capture via maximizing the host–guest and guest–guest interactions.Two ultramicroporous metal-organic frameworks(MOFs),MIL-160 and MOF-303 are elaborately constructed to exhibit ultrahigh C_(2)H_(2)uptakes of 235 and 195 cm^(3)·g^(−1),respectively,due to the confinement effect of the suitable pore sizes and periodically dispersed molecular recognition sites.Specially,C_(2)H_(2)capacity of MIL-160 sets a new benchmark for C_(2)H_(2)storage.The exceptional separation performances of two materials for C_(2)H_(2)over both CO_(2)and ethylene(C_(2)H_(4)),which is rarely observed,outperform most of the benchmark materials for C_(2)H_(2)capture.We scrutinized the origins of ultrahigh C_(2)H_(2)loading in the confined channels via theoretical investigations.The superior separation efficiency for C_(2)H_(2)/CO_(2)and C_(2)H_(2)/C_(2)H_(4)mixtures with unprecedented C_(2)H_(2)trapping capacity(>200 L·kg^(−1))was further demonstrated by dynamic breakthrough experiments.展开更多
文摘The co-cracking of natural gas and coal by a 15kW nitrogen(N2 flux:2m3·h-1) thermal plasma jet was investigated experimentally.For comparing with the cracking natural gas or coal separately, the experiments were arranged as following: （1）Cracking of natural gas;（2）Cracking of coal;（3）Co-cracking of natural gas and coal.Under the same experimental conditions, especially the same power, the experiments show that co-cracking can lead to more output of acetylene and ethylene, even more than the sum of that from（1）and（2）.The analysis shows that,during the co-cracking process, the natural gas and the coal both acquire the effect of cracking separately; the surplus output may probably be resulted from the interaction of hydrogen and carbon. Here, the hydrogen is resulted from cracking of natural gas and the carbon——from cracking of coal.
基金the National Natural Science Foundation of China(No.21868002)Dean Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology(No.2021Z010).
文摘Developing advanced porous materials possessing both a high storage capacity and selectivity for acetylene(C_(2)H_(2))remains challenging but a sought-after endeavor.Herein we show a strategy involving synergic combination of spatial confinement and commensurate stacking for enhanced C_(2)H_(2)storage and capture via maximizing the host–guest and guest–guest interactions.Two ultramicroporous metal-organic frameworks(MOFs),MIL-160 and MOF-303 are elaborately constructed to exhibit ultrahigh C_(2)H_(2)uptakes of 235 and 195 cm^(3)·g^(−1),respectively,due to the confinement effect of the suitable pore sizes and periodically dispersed molecular recognition sites.Specially,C_(2)H_(2)capacity of MIL-160 sets a new benchmark for C_(2)H_(2)storage.The exceptional separation performances of two materials for C_(2)H_(2)over both CO_(2)and ethylene(C_(2)H_(4)),which is rarely observed,outperform most of the benchmark materials for C_(2)H_(2)capture.We scrutinized the origins of ultrahigh C_(2)H_(2)loading in the confined channels via theoretical investigations.The superior separation efficiency for C_(2)H_(2)/CO_(2)and C_(2)H_(2)/C_(2)H_(4)mixtures with unprecedented C_(2)H_(2)trapping capacity(>200 L·kg^(−1))was further demonstrated by dynamic breakthrough experiments.
