TY - JOUR

T1 - Coupling pre-reforming and partial oxidation for LPG conversion to syngas

AU - Potemkin, Dmitriy I.

AU - Rogozhnikov, Vladimir N.

AU - Uskov, Sergey I.

AU - Shilov, Vladislav A.

AU - Snytnikov, Pavel V.

AU - Sobyanin, Vladimir A.

PY - 2020/9

Y1 - 2020/9

N2 - Coupling of the pre-reforming and partial oxidation was considered for the conversion of liquefied petroleum gas to syngas for the feeding applications of solid oxide fuel cells. Compared with conventional two step steam reforming, it allows the amount of water required for the process, and therefore the energy needed for water evaporation, to be lowered; substitution of high-potential heat by lower ones; and substitution of expensive tubular steam reforming reactors by adiabatic ones. The supposed process is more productive due to the high reaction rate of partial oxidation. The obtained syngas contains only ca. 10 vol.% H2 O and ca. 50 vol.% of H2 + CO, which is attractive for the feeding application of solid oxide fuel cells. Compared with direct partial oxidation of liquefied petroleum gas, the suggested scheme is more energy efficient and overcomes problems with coke formation and catalyst overheating. The proof-of-concept experiments were carried out. The granular Ni-Cr2 O3-Al2 O3 catalyst was shown to be effective for propane pre-reforming at 350–400◦ C, H2 O:C molar ratio of 1.0, and flow rate of 12,000 h−1. The composite Rh/Ce0.75 Zr0.25 O2-δ –η-Al2 O3 /FeCrAl catalyst was shown to be active and stable under conditions of partial oxidation of methane-rich syngas after pre-reforming and provided a syngas (H2 + CO) productivity of 28 m3·Lcat −1·h−1 (standard temperature and pressure).

AB - Coupling of the pre-reforming and partial oxidation was considered for the conversion of liquefied petroleum gas to syngas for the feeding applications of solid oxide fuel cells. Compared with conventional two step steam reforming, it allows the amount of water required for the process, and therefore the energy needed for water evaporation, to be lowered; substitution of high-potential heat by lower ones; and substitution of expensive tubular steam reforming reactors by adiabatic ones. The supposed process is more productive due to the high reaction rate of partial oxidation. The obtained syngas contains only ca. 10 vol.% H2 O and ca. 50 vol.% of H2 + CO, which is attractive for the feeding application of solid oxide fuel cells. Compared with direct partial oxidation of liquefied petroleum gas, the suggested scheme is more energy efficient and overcomes problems with coke formation and catalyst overheating. The proof-of-concept experiments were carried out. The granular Ni-Cr2 O3-Al2 O3 catalyst was shown to be effective for propane pre-reforming at 350–400◦ C, H2 O:C molar ratio of 1.0, and flow rate of 12,000 h−1. The composite Rh/Ce0.75 Zr0.25 O2-δ –η-Al2 O3 /FeCrAl catalyst was shown to be active and stable under conditions of partial oxidation of methane-rich syngas after pre-reforming and provided a syngas (H2 + CO) productivity of 28 m3·Lcat −1·h−1 (standard temperature and pressure).

KW - LPG

KW - Partial oxidation

KW - Pre-reforming

KW - Propane

KW - SOFC

KW - Syngas

KW - Tri-reforming

KW - pre-reforming

KW - propane

KW - syngas

KW - STEAM

KW - partial oxidation

KW - tri-reforming

KW - GAS

KW - CATALYSTS

UR - http://www.scopus.com/inward/record.url?scp=85091497444&partnerID=8YFLogxK

U2 - 10.3390/catal10091095

DO - 10.3390/catal10091095

M3 - Article

AN - SCOPUS:85091497444

VL - 10

SP - 1

EP - 7

JO - Catalysts

JF - Catalysts

SN - 2073-4344

IS - 9

M1 - 1095

ER -