Effect of supercritical water on upgrading reaction of oil sand bitumen

Morimoto, Masato; Sugimoto, Yoshikazu; Saotome, Yoshiaki; Sato, Shinya; Takanohashi, Toshimasa

doi:10.1016/j.supflu.2010.08.002

Cited by 148 publications

(136 citation statements)

References 14 publications

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“…As shown in the figure, the reaction pressure had a dramatic influence on the catalytic decomposition of bitumen. The total yield of lighter components (gas oil and VGO) reached approximately 70 mol%-C, and the formation suppressed in super-critical water due to the cage effect [34]. In that experiment, heavy components with high molecular weights were dispersed in super-critical water.…”

mentioning

confidence: 85%

Upgrading of oil sand bitumen over an iron oxide catalyst using sub- and super-critical water

Kondoh

Nakasaka

Kitaguchi

et al. 2016

Fuel Processing Technology

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Upgrading of oil sand bitumen was examined using a catalyst consisting of CeO 2 -ZrO 2 -Al 2 O 3 -FeO X and sub-and super-critical water in two reactor types: batch-type and fixed-bed flow-type. Bitumen diluted with benzene was used as a feedstock, and the effects of reaction pressure and temperature on product yield were 5 investigated. Under conditions of high pressure (approximately 19 MPa), catalytic decomposition of bitumen proceeded effectively over the FeO X -based catalyst, with the yield of lighter components such as gas oil and vacuum gas oil (VGO) reaching 70 mol%-C at a reaction temperature of 693 K. Moreover, because coke formation on the catalyst was suppressed (less than 10 mol%-C under optimized reaction pressure and 10 temperature), the FeO X -based catalyst showed excellent durability and reusability for catalytic decomposition of bitumen.

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mentioning

confidence: 85%

Upgrading of oil sand bitumen over an iron oxide catalyst using sub- and super-critical water

Kondoh

Nakasaka

Kitaguchi

et al. 2016

Fuel Processing Technology

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“…For instance, the coke yield in Ni40Mo40 is only 0.4%, which is a promising result. Low yields to coke obtained seem to be related to SCW as reaction medium, which can aid in the suppression of coke formation and facilitates the dispersion of coke precursors as has been reported elsewhere [9,37,38].…”

Section: Resultsmentioning

confidence: 56%

“…Interestingly, coke yields are remarkably low in all cases, which results advantageous in comparison with the traditional hydrocracking process where coke deposition is one of the main problems as it causes catalyst deactivation [9]. For instance, the coke yield in Ni40Mo40 is only 0.4%, which is a promising result.…”

Section: Resultsmentioning

confidence: 96%

“…Hydrothermal heavy oil upgrading has shown important improvements compared to thermal upgrading methods as higher yields to lighter liquid product fractions are obtained at the expense of a reduction in the amount of coke produced [9,10]. Moreover, high degree of metal [11,12] and heteroatom removal [13,14] were achieved in hydrothermal heavy oil upgrading processes.…”

Section: Introductionmentioning

confidence: 99%

“…Under these conditions, aromatic rings are well dissolved and dispersed in the reaction medium, favoring the contact between reactants and catalyst particles. Additionally, the upgrading process in SCW typically takes place with significantly low coke formation [9].…”

Section: Introductionmentioning

confidence: 99%

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Anthracene aquacracking using NiMo/SiO2 catalysts in supercritical water conditions

Reina

Yeletsky

Bermúdez

et al. 2016

Fuel

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A series of effective NiMo/SiO 2 catalysts for heavy oil upgrading in supercritical water have been developed. Experimental results with anthracene as model compound resembling structures present in heavy oils showed that the catalytic activity as well as the liquid and gas product distributions are governed by catalyst composition. In particular by adjusting the Ni/Mo ratio different physicochemical properties (crystalline phase composition, particle size and catalysts reducibility) are obtained, which have influence on catalytic behavior. A variety of liquid products together with a valuable gas (rich in H 2 ) are produced in this process, which takes place with remarkably low coke deposition on the catalysts. Overall, the results derived from this work confirm the viability of upgrading polyaromatic structures in supercritical water using Ni-Mo catalysts and provides an insight on the main parameters to control in catalyst design.

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Applications of SCW

Marcus¹

2012

Supercritical Water

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Effect of supercritical water on upgrading reaction of oil sand bitumen

Cited by 148 publications

References 14 publications

Upgrading of oil sand bitumen over an iron oxide catalyst using sub- and super-critical water

Upgrading of oil sand bitumen over an iron oxide catalyst using sub- and super-critical water

Anthracene aquacracking using NiMo/SiO2 catalysts in supercritical water conditions

Applications of SCW

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