and flow rates of the sweep gas on the oxygen permeation fluxes were investigated in details. Unlimited viewing of the article PDF and any associated supplements and figures. A first subject-matter of the invention is a process for producing ethane, characterized in that it comprises bringing methane into contact with a metal catalyst chosen from metal hydrides, metal organic compouns and mixtures thereof. Energy. Journal of Industrial and Engineering Chemistry.
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A fifth process for the preparation of a metal catalyst can comprise the following stages: Stage (b) of the process can be carried out at a temperature equivalent to that of stage (b) of the fourth preparation process.
Photoelectrochemical Homocoupling of Methane under Blue Light Irradiation.
of hydrated MgO, Mg(OH)2, Mg(NO3)2, Mg(OAc)2, and MgCO3 are investigated.
Now we are focusing on deeper understanding of mechanism of methane activation, development of new materials able to activate methane in visible light and design of self-regenerating photochemical systems.
The process of the invention can be carried out in the presence of one or more inert agents, in particular liquid or gaseous inert agents, especially in the presence of one or more inert gases, such as nitrogen, helium or argon.
This may take some time to load. of 750°. 2 CH3Cl + 2 Na → H3CCH3 + 2 NaCl. surfaces. (b) the solid product resulting from stage (a) is treated with hydrogen or a reducing agent capable of forming a metal Me-hydrogen bond, preferably by hydrogenolysis of the hydrocarbon ligands, at a temperature in particular at most equal to the temperature T1 at which the catalyst is formed solely in the form (A) as defined above. The contacting operation can be carried out at ambient temperature (20° C.) or more generally at a temperature ranging from −80° C. to +150° C., under an inert atmosphere, such as nitrogen. (e) the solid product resulting from stage (d) is treated with hydrogen or a reducing agent capable of forming metal Me-hydrogen bonds, preferably by complete hydrogenolysis of the hydrocarbon ligands of the grafted precursor (P′), at a temperature in particular at most equal to the temperature T1 at which the catalyst is formed solely in the form (A) as defined above. properties are reported. reaction rate in the reaction side by use of a heterogeneous catalyst can enhance the oxygen permeation flux through an ionic or mixed-conducting ceramic membrane. The oxygen permeation fluxes through tubular BYS membrane reactors under OCM reaction conditions are approx. Lumped rate equations for C2 and COx formation were obtained as functions of temp., O2 and CH4 partial pressures.
form dense ceramic membranes, which exhibit significant oxygen ionic and electronic cond. The metal catalyst can advantageously be chosen from metal catalysts supported on and grafted to a solid support comprising the metal, Me, present in both forms (A) and (B). Mechanistic considerations showed that pressure should be taken into account in evaluating oxidative coupling catalyst performance, and predicted an upper limit of ∼30% yield of C2+ hydrocarbons at 1 atm. The solid support can also be chosen from azides, in particular boron azide. at the reaction side of the membrane. Furthermore, the process of the present invention can be advantageously carried out under conditions involving a non-oxidative catalytic coupling of methane. The role of the catalyst is underlined by the fact that the LaSr/CaO shows that highest yield between 900 and 1000° while yields decline for the Sr/La2O3 catalyst at temps. However, the process by oxidative coupling generally results in the formation of relatively large amounts of by-products, such as carbon monoxide and carbon dioxide, … 2 in the DMR was much lower and more uniform than that in the FBR because of the different reactant feeding mode and logarithmic dependence of oxygen flux on oxygen partial pressures of the dense ceramic membrane. Biomimetic solar steam generation and transportation system.
Reproduced material should be attributed as follows: If the material has been adapted instead of reproduced from the original RSC publication Qiubing Dong, Xin Zhang, Shuang Liu, Rui‐Biao Lin, Yanan Guo, Yunsheng Ma, Akira Yonezu, Rajamani Krishna, Gongpin Liu, Jingui Duan, Ryotaro Matsuda, Wanqin Jin, Banglin Chen. results also suggest that increasing oxidn. If you have previously obtained access with your personal account, please log in.
© 2004-2020 FreePatentsOnline.com. The atom M of the solid support is preferably at least one of the elements chosen from the lanthanides, the actinides and the elements from Groups 2 to 6 and from Groups 13 to 15 of the Periodic Table of the Elements, in particular from silicon, aluminium and phosphorus. To the best of our knowledge, the C2+ yield obtained in this study is the highest value reported so far.
Jemal Yimer Damte, Zhan‐Jun Zhu, Pin‐Jun Lin, Chen‐Hao Yeh, Jyh‐Chiang Jiang.
materials currently used and under investigation for such cells, together with the problems assocd. Unexpectedly Promoting Effect of Carbon Nanotubes Grown During the Non-oxidative Coupling of Methane over Copper Catalysts. A La0.6Sr0.4Co0.2Fe0.8O3-α (LSCF) perovskite hollow-fiber membrane with an asym. for MgO obtained from the other precursors. SOFCs directly fueled with MeOH, EtOH, PrOH, and BuOH were studied. Herein, we report oxidative methane conversion to ethane using gaseous O2 at low temperatures (<400 °C) and atmospheric pressure in a continuous reactor. methane vs ethane. Zen Maeno, Shunsaku Yasumura, Chong Liu, Takashi Toyao, Kenichi Kon, Akira Nakayama, Jun-ya Hasegawa, Ken-ichi Shimizu. activation at room temperature. In the form (B), the metal, Me, is preferably bonded solely to the support, in particular to one or more atoms constituting the essential elements of the support, in particular to one or more atoms X of the support such as are described above, for example by single or double bonds. the catalytic bed (145 g catalyst) with quartz (200 and 400 g), a slight decrease of the selectivity (1-2%) was obsd. Oxygen permeation flux under the condition of extremely fast reaction is several-fold higher than that under the condition of slow reaction as a result of the decrease of the oxygen partial pressure in the reaction side with increasing reaction rate. of oxygen ions and oxygen mols. Methane is treated with chlorine gas in the presence of ultraviolet light to form chloro methane. Capturing methane before it gets into the atmosphere also helps reduce the effects of climate change. The elec. The German Patent Application is silent about the ethane production compared with the formation of the other higher hydrocarbons.
reaction with ethane than with methane.
As continuation of this research, we tested silver containing heteropolyacid over titania in the anaerobic transformation of methane. at a temperature ranging from −30° C. to +80° C., preferably from 20° C. to 500° C., under a total absolute pressure ranging from 10.