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Continuous Supercritical Water Gasification of Isooctane : A promising reactor design

A new design of supercritical water gasification system was developed to achieve high
hydrogen gas yield and good gas–liquid flow stability. The apparatus consisted of a reaction
zone, an insulation zone and a cooling zone that were directly connected to the reaction
zone. The reactor was set up at an inclination of 75 degree from vertical position, and feed and
water were introduced at the bottom of the reactor. The performances of this new system
were investigated with gasification of isooctane at various experimental conditions –
reaction temperatures of 601–676 degree C, residence times of 6–33 s, isooctane concentrations of
5–33 wt%, and oxidant (hydrogen peroxide) concentrations up to 4507 mmol/L without
using catalysts. A significant increase in hydrogen gas yield, almost four times higher than
that from the previous up-down gasifier configuration (B. Veriansyah, J. Kim, J.D. Kim, Y.W.
Lee, Hydrogen Production by Gasification of Isooctane using Supercritical Water, Int. J.
Green Energy. 5 (2008) 322–333) was observed with the present gasifier configuration. High
hydrogen gas yield (6.13 mol/mol isooctane) was obtained at high reaction temperature of
637 degree C, a low feed concentration of 9.9 wt% and a long residence time of 18 s in the presence
of 2701.1 mmol/L hydrogen peroxide. At this condition, the produced gases mainly
consisted of hydrogen (59.5 mol%), methane (14.8 mol%) and carbon dioxide (22.0 mol%),
and a small amount of carbon monoxide (1.6 mol%) and C2–C3 species (2.1 mol%). Reaction
mechanisms of supercritical water gasification of isooctane were also presented.

Ketersediaan

Informasi Detail

Judul Seri

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; Vol.35, Issue 5, March 2010

No. Panggil

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Penerbit

Amsterdam : Elsevier., 2010

Deskripsi Fisik

p. 1957 - 1970

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

HYDROGEN
ISOOCTANE
SUPERCRITICAL WATER GASIFICATION
GASIFIER CONFIGURATION

Info Detail Spesifik

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Pernyataan Tanggungjawab

Ratna Frida Susanti, Bambang Veriansyah, Jae-Duck Kim, Jaehon Kim, Youn-Woo Lee

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