During the last decade, dry methane reforming (Eq. 1) has received much attention [1,2] because this reaction is able to produce high purity synthesis gas (syngas) from natural gas. CO2 + CH4 -> 2CO + 2H2 (1) One advantage of dry methane reforming (DMR) is reducing a well-know greenhouse gas such as CO2. An important decrease in the emission of CO2 would be clearly beneficial to the environment [3,4]. Syngas with different H2/CO ratio have been employed in several industrial processes such as methanol, dimethyl ether or free-sulfur diesel and paraffines by Fischer-Tropsch synthesis [2,5]. An Alternative low cost catalyst for methane reforming reactions is nickel-based catalysts [6]. In addition, activated carbon (AC) has showed appropriate characteristics as catalytic support [7,8]. However, AC has been rarely employed as catalytic support for dry methane reforming [9-11] because it can suffer gasification by steam or by CO2, through the reverse Boudouard reaction because both processes occur spontaneously at temperatures about 700°C. The objective of this work is to study the influence of different promoters such as CaO, MgO, CuO and ZnO on the catalytic activity and stability of Ni-based catalysts supported on AC during DMR under mild experimental conditions.reaction and to verify the influence of the microporosity of AC upon the diameter of multiwalled carbon nanotubes produced along dry methane reforming reaction.
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