Activated carbon microbeads

Coals mesophase pitch coal chars coal tar pitch carbon mesocarbon microbeads, carbon fibers semi-coke, calcined coke activated carbons premium cokes, carbon fibers, binder and matrix... 

We have recently deposited directly onto activated carbons and polymer microbeads by deposition-reduction method and have found that gold NPs on pol5mers exhibit remarkably high catalytic activity, which may exceed those of Au/activated carbons and Au/ fine Ce02. The type of polymers and their functional groups are critical to the catalytic activity. 

As described in Section 3.3.3.1, the PFA-P7-H carbon better inherits the structural regularity from the parent zeolite than the other carbons. Moreover, the pore structure of this carbon is unique and it has never been found in any type of carbon. Its detail will be explained in this section in comparison with three commercial activated carbons MSC-30 (Kansai Coke and Chemicals), M-30 (Osaka Gas), and ACF-20 (Osaka Gas). The former two carbons were prepared from petroleum coke and mesocarbon microbeads, respectively, and both were activated with KOH. The last sample was activated with carbon fibers (ACFs). All are characterized by a large BET SSA. 

Fig. 4. Experimental (target) and simulated carbon-carbon radial distribution function for an activated mesocarbon microbead adsorbent [32]. The RDFs are reported in the form 471 r fi[g(r) — 1], where p is the average carbon density and r is the carbon pair separation distance noted on the horizontal axis. The simulated RDFs for the initial and converged (dashed line) model structures are shown, with numbered peaks referenced in the text.

Figure 5 1 Activated mesocarbon microbead RAIC model, (a) Structural representation of the converged structure. The spheres represent carbon atoms that are shown at a scale much less than their van der Waals radii for reasons of clarity, (b) C-C radial distribution functions (RDF). The experimental RDF (solid line), the simulated, converged RDF (long-dashed line), and the initial simulated RDF (dotted line) are shown. The numbers indicate the different peaks of the RDF. (Adapted from Ref. [33].)...

Zheng, C., J. C. Gao, M. Yoshio, L. Qi, and H. Y. Wang. 2013. Non-porous activated mesophase carbon microbeads as a negative electrode material for asymmetric electrochemical capacitors. Jourrml of Power Sources 231 29—33. 

Chen, X. and McEnaney, B. Activation of meso-carbon microbeads. Proceedings of Carbon Conference 2001, Lexington (Kentucky), 2001. 

Activation is often conducted by processing with steam or chemical agents. Carbons activated by steam can be prepared from raw materials such as coal, peat, or lignite, which are carbonized and reacted with high-temperature water steam, in the process where fraction of carbon atoms are gasified, leaving beside porous structure. Chemically, carbon can also be activated with phosphoric acid. So-called mesocarbon microbeads (MCMBs) were produced from coal tar pitch in the Osaka... 

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