Role of support lattice oxygen on steam reforming of toluene for hydrogen production over Ni/La0.7Sr0.3AlO3−δ catalyst

High catalytic activity of Co-Fe/α-Al2O3 in the steam reforming of toluene in the presence of hydrogen

“…In the system, biomass was pyrolyzed in non-catalytic process producing mainly tar, which is gasified with steam reforming over catalysts. Recently, various Co-based catalysts have been reported to show the high performance in the steam reforming of oxygenates [11][12][13][14][15][16] hydrocarbons [17,18] and biomass-derived tar [19][20][21][22] as well as Ni-based catalysts [23][24][25][26][27][28][29][30][31][32][33][34][35][36]. In addition, the promoting effect of Fe addition to Ni catalysts in the steam reforming has been reported [37][38][39][40], and the additive effect of Fe to Co catalysts has been investigated [41][42][43][44][45].…”

Effect of Hydrocarbon Structure on Steam Reforming over Ni/perovskite Catalyst

“…Figure 1 shows the Arrhenius plots for steam reforming of alkane (n-heptane), naphthene (methylcyclohexane), and aromatic compound (toluene) over Ni/LSAO and Ni/LAO catalysts. The apparent activation energy changed between high and low temperatures in a specific temperature range of around 800-1000 K 19) , i.e. the apparent activation energy changed at 803 K on Ni/ LSAO, and at 936 K on Ni/LAO.…”

“…This change in apparent activation energy reflects the change in the rate limiting step. The reaction mechanism changed from the Langmuir-Hinshelwood (L-H) model at low temperature to the redox model (using lattice oxygen) at high temperature, which resulted from the higher lattice oxygen mobility 18), 19) . The partial pressure dependencies of steam and aromatic compound were measured to identify the rate limiting step.…”

“…Perovskite-type oxides have lattice oxygen conductivity which may have promoted the oxidation of CHx and inhibited carbon deposition. Our previous studies revealed that perovskite-type oxides are an effective catalyst support for the steam reforming o f a r o m a t i c c o m p o u n d s ( t o l u e n e ) , a s N i / La0.7Sr0.3AlO2.85 (LSAO) showed high activity and carbon resistance 18), 19) . Isotope exchange experiments (H2 18 O) revealed that the lattice oxygen mobility was improved by partial substitution of La 3 with Sr 2 20) .…”

Utilization of Volatile Organic Compounds as an Alternative for Destructive Abatement

“…To assess the efficiency of a classical reforming process, model molecules such as benzene [139][140][141], toluene [142,143] are usually studied and can provide insight for the VOCs utilization and processing. The existing studies are more oriented on steam reforming reaction using conventional catalysts such as Rh based catalyst [144][145][146][147], supported Ni catalyst [148][149][150][151][152][153][154], Ni-mixed oxide: perovskite [155-159] and hexaaluminate [148]. Rh based catalyst are reported to be highly active for toluene and benzene reforming within the temperature range of 700-850 °C [147,156].…”