Abstract

Thermal cracking of C₅-deasphalted oil (C₅-DAO) was performed in a batch reactor at 410°C in the absence and presence of H₂ gas and catalysts. Coke was formed during the thermal cracking of C₅-DAO even though the feed contained no asphaltenes. Although H₂ suppressed asphaltene formation and decreased the coke yield, coke was still formed in the absence of a catalyst. A slurry-phase dispersed catalyst inhibited the transformation of resins into heavier fractions and facilitated <1 wt % asphaltene yield with no coke formation even under high conversion conditions. The main function of the catalyst was the facilitation of hydrogenation reactions and the stabilization of free radicals, leading to liquid production by inhibiting coke formation. Consequently, the product quality, in terms of hydrogen to carbon ratio and microcarbon residue and S contents, was enhanced by catalytic hydrocracking.

中文翻译：

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C 5脱沥青油的加氢裂化：H 2和分散催化剂的影响

摘要

在不存在和存在H ₂气体和催化剂的情况下，在间歇式反应器中于410℃下进行C ₅脱沥青油（C ₅ -DAO）的热裂解。即使进料中不含沥青质，在C ₅ -DAO的热裂解过程中也会形成焦炭。虽然H ₂抑制了沥青质的形成并降低了焦炭收率，在没有催化剂的情况下仍会形成焦炭。淤浆相分散的催化剂即使在高转化率条件下也抑制了树脂向较重馏分的转化，并促进了＜1wt％的沥青质收率，并且没有焦炭形成。催化剂的主要功能是促进氢化反应和稳定自由基，从而通过抑制焦炭形成而产生液体。因此，通过氢催化加氢裂化提高了产品质量，包括氢碳比，微碳残留量和S含量。