References

Kidena, K., Y. Kamiyama and M. Nomura, 2008. A possibility of the production of carbon nanotubes from heavy hydrocarbons. Full Process. Technol., 89: 449-454.
CrossRef  |  

Krishnan, M.S., 1940. Classification of coal geological survey of India. Domestic Coal Price Fixation Coal India Ltd., http://www.helixmaterial.com/Ordering.html.

Qiu, J., Y. Li, Y. Wang and W. Li, 2004. Production of carbon nanotubes from coal. Fuel Proces. Technol., 85: 1663-1670.
CrossRef  |  

Qiu, J., Y. Li, Y. Wang, T. Wang and Z. Zhao et al., 2003. High-purity single-wall carbon nanotubes synthesized from coal. Carbon, 41: 2159-2179.

Qiu, J., Z. Wang, Z. Zhao and T. Wang, 2007. Synthesis of double-walled carbon nanotubes from coal in hydrogen-free atmosphere. Fuel, 86: 282-286.
CrossRef  |  

Qiu, J.S., F. Zhang, Y. Zhou, H.M. Han, D.S. Hu, S.C. Tsang and P.J.F. Harris, 2002. Carbon nano-materials from eleven caking coals. Fuel, 81: 1509-1514.
Direct Link  |  

Tsai, Y.Y., J.S. Su and C.Y. Su, 2008. A novel method to produce carbon nanotubes using EDM process. Int. J. Mach. Tools Manuf., 48: 1653-1657.
CrossRef  |  

Williams, K.A., M. Tachibana, J.L. Allen, L. Grigorian and S.C. Cheng et al., 1999. Single-wall carbon nanotubes from coal. Chemical Phys. Lett., 310: 31-37.

Yu, J., J. Lucas, V. Strezov and T. Wall, 2003. Coal and carbon nanotube production. Fuel, 82: 2025-2032.