Ghazaleh Allaedini - Department of Chemical and Process Engineering, UniversitiKebangsaan Malaysia, ۴۳۶۰۰ Bangi, Selangor, Malaysia.
Siti Masrinda Tasirin - Department of Chemical and Process Engineering, UniversitiKebangsaan Malaysia, ۴۳۶۰۰ Bangi, Selangor, Malaysia.
Payam Aminayi - Chemical and Paper Engineering, Western Michigan University, Kalamazoo, Michigan, USA.
Zahira Yaakob - Department of Chemical and Process Engineering, UniversitiKebangsaan Malaysia, ۴۳۶۰۰ Bangi, Selangor, Malaysia.
Meor Zainal Meor Talib - Department of Chemical and Process Engineering, UniversitiKebangsaan Malaysia, ۴۳۶۰۰ Bangi, Selangor, Malaysia.

This review paper provides researcherwith a comprehensive information about the Carbon Nano tubes and the catalyst parameters that influences theproduction and morphology of the of Carbon Nano tubes.Carbon nanotubes, referred to as CNTs, are one of the most important materials used in electrical, mechanical, thermal, chemical and textile industries. Since discovery of CNTs in ۱۹۹۱, many scientists, research groups, and industries have attempted to attain large scale production of CNTs, considering the costs and yields. Catalyst plays an important role in the production of CNTs. In this review various factors that affect CNT production via using different catalysts are reviewed. Factors which are important when choosing a suitable catalyst are also discussed

Carbon nanotubes, catalysts, CNT growth, CVD processes, Transition metals