Regarding the DRM catalyst, Nickel-based catalysts are mostly selected for the DRM process due to high activity and low price 5– 10. The dry reforming of methane (DRM) is a promising process towards the utilization of two main greenhouse gases (GHGs) causing global warming: carbon dioxide (CO 2) and methane (CH 4), while producing syngas: hydrogen (H 2) and carbon monoxide (CO) useful as a feedstock for value-added chemical productions 1– 4. Thus, to effectively utilize the coke-resistant property of NiCo catalyst for DRM, one should together combine its high coke diffusion rate with coke removal mechanisms such as oxidation or hydrogenation, especially at the final diffusion site, to ensure that there will not be enough coke at the final site that will cause back-diffusion. Moreover, the calculation of the surface fraction weighted rate of coke diffusion which modeled the real NiCo particle into four regions: Ni-dominant, Co-dominant, NiCo-dominant, and the mixed region consisting a comparable amount of the former there regions, have shown that the synthesis of a NiCo particle should be dominated with NiCo region while keeping the Ni-dominant, and Co-dominant regions to be as low as possible to facilitate coke diffusion and removal. It was found that the high stability against coking found on the NiCo surface can be summarized into two key factors: (1) the role of Co weakening the bond between a Ni active site and coke (2) significantly high surface coke diffusion rate on NiCo.
This work provided an insight into how the NiCo bimetallic catalyst can perform with high stability against coking during DRM compared to the Ni and Co monometallic catalysts, in which the experimental and computational techniques based on density functional theory were performed. One of the most prominent solutions is to close the carbon cycle by utilizing the greenhouse gas: CO 2, and CH 4, as a feedstock via the dry reforming of methane (DRM).
Surfer 13 ternary contour plotter how to#
Furthermore the upper edge does not have any ticks, and I don't know how to let pgfplots draw some there.Global warming remains one of the greatest challenges. However, the upper edge is gray and only half width as you just painted over it, so you'll have to draw it again via \draw (axis cs: 0.7,0.3) - (axis cs:0.7,0.0). Put after the axis environment will yield \path (current axis.outer south west) rectangle ($(current axis.outer north east)+(0,-3.5)$) As not the whole plot area is needed, you can use the calc library for computations with coordinates. However there are special anchors like outer south west which you can use. The normal anchors like south east only contain the plot but not the labels. Fortunately, for the last axis environment a node named current axis is defined. This has to be done outside of the axis environment, so unfortunately you won't be able to use the axis coordinate system any more.
Next, you'll need to reset the current boundin box and create a new one. However it is quite possible to define e.g. This is a little strange, as the x-axis is the one pointing in 120° direction while the y-axis points in 240° direction. This is best done in the axis coordinate system, which you can use via (axis cs:).
First you need to find out what region to paint over in white.
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