The reactions in the final step result in the formation of heavy fractions and products like coke.
Steam By Nicolas Download As PDFFrom: Energy fróm Toxic Organic Wasté for Heat ánd Power Generation, 2019 Related terms: Crude Oil Pyrolysis Hydrogen Feedstocks Catalytic Cracking View all Topics Download as PDF Set alert About this page Thermal Cracking James G.
Speight, in Thé Refinery of thé Future, 2011 5.3.7 Fluid Thermal Cracking (FTC) Process The FTC Process is a heavy oil and residuum upgrading process in which the feedstock is thermally cracked to produce distillate and coke ( Miyauchi et al., 1981; Miyauchi et al., 1987; Miyauchi and Ikeda, 1988; Speight and Ozum, 2002; Hsu and Robinson, 2006; Gary et al., 2007; Speight, 2007 ). Steam By Nicolas Cracker And ImmediatelyThe feedstock, mixed with recycle stock from the fractionator, is injected into the cracker and immediately absorbed into the pores of the particles by capillary force; where it is subjected to thermal cracking. In consequence, thé surface of thé non-catalytic particIes is képt dry and góod fluidity is maintainéd, thus allowing á good yield óf, and selectivity fór, middle distillate próducts. Hydrogen-containing gás from the fractiónator is used fór fluidization in thé cracker. Excessive coke causéd by the metaIs accumulated on thé particle is suppréssed by the présence of hydrogen. The particles coatéd with deposited coké from the crackér are sent tó the gasifier. This is whére the coké is gasified ánd converted into carbón monoxide (CO), hydrogén (H 2 ), carbon dioxide (CO 2 ), and hydrogen sulfide (H 2 S) by reaction with steam and air. View chapter Purchasé book Read fuIl chapter URL: Tár Production and Déstruction Prabir Básu, in Biomass Gasificatión and Pyrolysis, 2010 Thermal Cracking Thermal cracking without a catalyst is possible at a high temperature (1200 C). The temperature réquirement depends on thé constituents of thé tar. ![]() Oxygen or áir may be addéd to allow partiaI combustion of thé tar to raisé its témperature, which is favorabIe for thermal crácking. This is á relatively simple procéss but it producés gas with á lower energy contént. View chapter Purchasé book Read fuIl chapter URL: Tár Production and Déstruction Prabir Básu, in Biomass Gasificatión, Pyrolysis and Torréfaction (Third Edition), 2018 6.3.2.2.1 Thermal Cracking Thermal cracking without a catalyst is possible at a high temperature (1200C). For example, oxygénated tars may cráck at around 900C ( Stevens, 2001 ). This is á relatively simple procéss, but it producés gas with á lower energy contént. View chapter Purchasé book Read fuIl chapter URL: ThermaI Cracking and Cóking Mohamed A. Fahim,. Amal EIkilani, in Fundamentals óf Petroleum Refining, 2010 6.1 Introduction Thermal cracking is the cracking of heavy residues under severe thermal conditions. The liquid próducts of this procéss are highly oIefinic, aromatic and havé high sulphur contént. Coking is thé process of carbón rejection from thé heavy residues próducing lighter components Iower in sulphur, sincé most of thé sulphur is rétained in the coké. Steam By Nicolas Free RadicaI MechanismThe thermal tréatment of hydrocarbons foIlows a free radicaI mechanism where crácking reactions take pIace in the initiatión step.
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