variavel0=<b>Marco Antonio Paiva</b> - mpaiva@ipt.br Instituto de Pesquisas Tecnológicas do Est. de S.P
<b>Nelson Seiji Yokaichiya</b> - nsyokaic@ipt.br IPT
<b>Ding Hua</b> - ding@ipt.br IPT
<b>Ademar Hakuo Ushima</b> - adidas@ipt.br IPT
<b>Maria Adelaide B. B. da Silva</b> - adelaide@cenpes.petrobras.com.br Petrobras/Cenpes
<b>Flávio Cortiñas Albuquerque</b> - albq@cenpes.petrobras.com.br Petrobras/Cenpes
<b>Abstract.</b> Thermal hydrocarbon cracking is often an undesirable phenomenon in the petrochemical industry, since may originate contaminants. The present research aimed at the study of the hydrocarbon cracking and coke deposition in liquid and gas heating, as well as in vaporizing. Petroleum gasoil was chosen as the primarily hydrocarbon to be focused. An experimental set-up was implemented and the influence of temperature, residence time, velocity, heat flux and the composition of the hydrocarbon can be analyzed. Experiments up to 600 oC may be run. In order to evaluate the intensity of craking and coke formation physical and chemical tests are performed, for instance, craking gas composition and flow, mass of deposited coke, composition (measured in several ways) along the process.
<b>Keywords.</b> Hydrocarbon coking, hydrocarbon thermal craking, petrochemistry.