In this paper the effect of catalyst and carrier in electric field enhanced plasma on methane conversion into C2 hydrocarbons was investigated. Methane coupling reaction was studied in the system of continuous flow r...In this paper the effect of catalyst and carrier in electric field enhanced plasma on methane conversion into C2 hydrocarbons was investigated. Methane coupling reaction was studied in the system of continuous flow reactor on Ni, MoO3, MnO2 catalysts and different ZSM-5 carriers. The per pass conversion of methane can be as high as 22%, the selectivity of ethylene can be as high as 23.8%, of acetylene 60.8%, of ethane 5.4% and of total C2 hydrocarbons was more than 90%. ZSM-5-25 was the better carrier and MnO2 was the better active component. The efficiency of energy was as high as 7.81%.展开更多
Direct conversion of methane to C_2 hydrocarbons via cold plasma reactionwith catalysts has been studied at room temperature and atmospheric pressure. Methane can beconverted into C_2 hydrocarbons in different selecti...Direct conversion of methane to C_2 hydrocarbons via cold plasma reactionwith catalysts has been studied at room temperature and atmospheric pressure. Methane can beconverted into C_2 hydrocarbons in different selectivity depending on the form of the reactor, powerof plasma, flow rate of methane, ratio of N_2/CH_4 and nature of the catalysts. The selectivity toC_2 hydrocarbons can reach as high as 98.64%, and the conversion of methane as high as 60% and theyield of C_2 hydrocarbons as high as 50% are obtained. Coking can be minimized under the conditionsof: proper selection of the catalysts, appropriate high flow rate of inlet methane and suitableratio of N_2 to CH_4. The catalyst surface provides active sites for radical recombination.展开更多
The infrared emission spectra of methane, H, CH' and C_2 hydrocarbons in natural gas were measured. The processes of methane decomposition and formation of C_2 hydrocarbons were studied. The experiment shows that ...The infrared emission spectra of methane, H, CH' and C_2 hydrocarbons in natural gas were measured. The processes of methane decomposition and formation of C_2 hydrocarbons were studied. The experiment shows that methane decomposition can be divided into three periods as the reaction proceeds. In the first period, a large number of free radicals were formed. While in the last period, the formation of C_2 hydrocarbons and the decrease of free radicals were observed. The time and conditions of methane decomposition and formation of C_2 hydrocarbons are different.展开更多
The infrared emission spectra of methane, H, CH and C2 hydrocarbons in natural gas were measured. The process of methane decomposition and C2 hydrocarbons formation was investigated. The experiment showed that the tim...The infrared emission spectra of methane, H, CH and C2 hydrocarbons in natural gas were measured. The process of methane decomposition and C2 hydrocarbons formation was investigated. The experiment showed that the time and conditions of methane decomposition and C2 hydrocarbons formation were different. Methane conversion rate increased with the increase in the current and decrease in the amount of methane. Furthermore, an examination of the reaction mechanisms revealed that free radicals played an important role in the chain reaction.展开更多
his paper deals with the results of comopition of C5-C15 hydrocarbons in the regions of the Bransfield Strait.The multivariate statistical analysis is made to recognize the characteristics of the sediments,resulting i...his paper deals with the results of comopition of C5-C15 hydrocarbons in the regions of the Bransfield Strait.The multivariate statistical analysis is made to recognize the characteristics of the sediments,resulting in that the C5-C15 hydrocarbons contain n-alkanes, iso-alkanes,cyclo-alkanes,aromatic compounds and their substituted compounds as well.The multivariate statistical analysis also shows that stations G25 and G-27 have the extreme values of factor after rotation.展开更多
基金Supports from the National Natural Science Foundation of China(No 29776037)
文摘In this paper the effect of catalyst and carrier in electric field enhanced plasma on methane conversion into C2 hydrocarbons was investigated. Methane coupling reaction was studied in the system of continuous flow reactor on Ni, MoO3, MnO2 catalysts and different ZSM-5 carriers. The per pass conversion of methane can be as high as 22%, the selectivity of ethylene can be as high as 23.8%, of acetylene 60.8%, of ethane 5.4% and of total C2 hydrocarbons was more than 90%. ZSM-5-25 was the better carrier and MnO2 was the better active component. The efficiency of energy was as high as 7.81%.
文摘Direct conversion of methane to C_2 hydrocarbons via cold plasma reactionwith catalysts has been studied at room temperature and atmospheric pressure. Methane can beconverted into C_2 hydrocarbons in different selectivity depending on the form of the reactor, powerof plasma, flow rate of methane, ratio of N_2/CH_4 and nature of the catalysts. The selectivity toC_2 hydrocarbons can reach as high as 98.64%, and the conversion of methane as high as 60% and theyield of C_2 hydrocarbons as high as 50% are obtained. Coking can be minimized under the conditionsof: proper selection of the catalysts, appropriate high flow rate of inlet methane and suitableratio of N_2 to CH_4. The catalyst surface provides active sites for radical recombination.
基金Financially supported by aspecial fund of the Education Committee of Shaanxi province(No.2000K13-G19and2002K09-G21)
文摘The infrared emission spectra of methane, H, CH' and C_2 hydrocarbons in natural gas were measured. The processes of methane decomposition and formation of C_2 hydrocarbons were studied. The experiment shows that methane decomposition can be divided into three periods as the reaction proceeds. In the first period, a large number of free radicals were formed. While in the last period, the formation of C_2 hydrocarbons and the decrease of free radicals were observed. The time and conditions of methane decomposition and formation of C_2 hydrocarbons are different.
基金supported by National Natural Science Foundation of ChinaDoctoral Foundation of Ministry of Education(20010698007)Returned Scholars Foundation of Ministry of Education(2001[345])
文摘The infrared emission spectra of methane, H, CH and C2 hydrocarbons in natural gas were measured. The process of methane decomposition and C2 hydrocarbons formation was investigated. The experiment showed that the time and conditions of methane decomposition and C2 hydrocarbons formation were different. Methane conversion rate increased with the increase in the current and decrease in the amount of methane. Furthermore, an examination of the reaction mechanisms revealed that free radicals played an important role in the chain reaction.
文摘his paper deals with the results of comopition of C5-C15 hydrocarbons in the regions of the Bransfield Strait.The multivariate statistical analysis is made to recognize the characteristics of the sediments,resulting in that the C5-C15 hydrocarbons contain n-alkanes, iso-alkanes,cyclo-alkanes,aromatic compounds and their substituted compounds as well.The multivariate statistical analysis also shows that stations G25 and G-27 have the extreme values of factor after rotation.
