**Iron Oxide-Based Catalyst for Catalytic Cracking of Heavy Oil Iron Oxide-Based Catalyst for Catalytic Cracking of Heavy Oil**

DOI: 10.5772/intechopen.72719

[22] Fujishima A, Hashimoto K, Watanabe T. TiO2 Photocatalysis Fundamentals and Applica-

[23] Hoffmann MR, Martin ST, Choi W, Bahnemann DW. Environmental applications of

[24] Maeda Y, Morinaga Y, Kobayashi K. Photoelectrochemical behavior of iron oxide electrode prepared from thermal oxidation of iron. Journal of the Surface Finishing Society of

[25] Maeda Y, Morinaga Y, Tomita Y, Kobayashi K. Photoanodic response of iron oxide electrode in aqueous solution and its application to Pb2+ removal under visible light

[26] Itoh Y, Kohno Y, Maeda Y. Photoelectrochemical behavior of iron oxide under visible light irradiation, 62nd Annual Meeting of the International Society of Electrochemistry;

[27] Morinaga Y, Kohno Y, Morinaga Y, Kohno Y, Tomita Y, Kobayashi K, Maeda Y. Photoelectrochemical characteristics of iron oxide/polyaniline in aqueous acidic solution.

[28] Maeda Y, Yoshida, Hamada H, Kohno Y. Preparation of iron oxide film and its photoelectrochemical behavior in aqueous solution, 65th Annual Meeting of the International

[29] Maeda Y, Itoh Y, Kodama D, Kohno Y. Photoanodic response of hematite electrode to citric acid in aqueous solution. Journal of Electroanalytical Chemistry. 2017;785:166-171

[30] Bard AJ, Parsons R, Jordan J. Standard Potentials in Aqueous Solution. Marcel Dekker,

[31] Pourbaix M. Atlas of Electrochemical Equilibria in Aqueous Solutions. Houston: NACE;

[32] Kikuchi T, Okazaki Y, Ikeda K. Fine iron oxide powder as a raw material of soft ferrites.

[33] Morrison SR, Freund T. Chemical reactions of electrons and holes at the ZnO/electrolyte-

[34] Dutoit EC, Cardon F, Gomes WP. Electrochemical reactions involving holes at the illuminated TiO2 (rutile) single crystal electrode. Berichte der Bunsengesellschaft für Physika-

solution interface. Electrochimica Acta. 1968;13:1343-1349

semiconductor photocatalysis. Chemical Reviews. 1995;95:69-96

irradiation. Electrochimica Acta. 2009;54:1757-1761

tions. Bkc. Inc.; 1998

176 Iron Ores and Iron Oxide Materials

Japan. 2007;58:376-378

Electrochemistry. 2011;79:168-171

Society of Electrochemistry; 2014

JFE Technical Report. 2005:26-31

lische Chemie. 1976;80:1285-1288

Inc; 1985. pp. 391-393

1966. pp. 308-310

2011

Eri Fumoto, Shinya Sato and Toshimasa Takanohashi Eri Fumoto, Shinya Sato and Toshimasa Takanohashi Additional information is available at the end of the chapter

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.72719

#### **Abstract**

This chapter describes an iron oxide catalyst containing Zr and Al for production of light hydrocarbons by catalytic cracking of petroleum residual oil in a steam atmosphere. The catalyst was hematite structure and useful for decomposition and desulfurization of residual oil. After lattice oxygen of iron oxide reacted with heavy oil fraction of residual oil, oxygen species generated from steam were supplied to iron oxide lattice and reacts with heavy oil fraction, producing light hydrocarbons and carbon dioxide. When the oxygen species were generated from steam, hydrogen species were simultaneously generated from steam. The hydrogen species were transferred to light hydrocarbons, hydrogen sulfide, and residue deposited on the catalyst. Supplies of the hydrogen species to light hydrocarbons suppressed alkene generation. Generation of hydrogen sulfide indicated decomposition of sulfur compounds of residual oil. The sulfur concentration of product oil decreased compared to the concentration of residual oil. Some oxygen species could be transferred to sulfur dioxide. Accordingly, hydrogenation and oxidation by the hydrogen and oxygen species derived from steam provided the decomposition and desulfurization of residual oil with the iron oxide-based catalyst in a steam atmosphere.

**Keywords:** iron oxide catalyst, atmospheric residue, steam catalytic cracking
