H2-rich syngas from glycerol dry reforming over Ni-based catalysts supported on alumina from aluminum dross

Glycerol and Catalysis by Waste/Low-Cost Materials—A Review

“…Among these techniques, catalytic steam reforming generally occurs when a significant amount of carbon monoxide reacts with the added steam and undergoes the water vapor displacement reaction that results in the formation of carbon dioxide and hydrogen [42], while glycerol dry reforming (GDR) offers a better way to produce H 2 as it uses greenhouse gas (CO 2 ) as a raw material. Furthermore, this reaction can be conducted at atmospheric pressure while producing a high yield of H 2 [43,44].…”

“…On the other hand, Roslan et al [44] evaluated the performance of an Ni-based catalyst supported on γ-Al 2 O 3 that was prepared from aluminum slag (AD) before use as a catalyst support. The extracted γ-Al 2 O 3 (EGA3) was produced from the acid leaching of the aluminum slag with the ammonia precipitation technique at a calcination temperature of 800 • C. It showed the best purity (100%) with a surface area of 267.5 m 2 g −1 , after which it was impregnated with 15% Ni by the ultrasound method before the evaluation in the reforming dry glycerol reaction (GDR).…”

Applications of Al2O3‐Based Nano‐Catalysts in Thermocatalytic CO2 Transformations: Impacts of Surface Acidity and Basicity

“…Compared with alkaline leaching with ammonium hydrogen carbonate and acid leaching with re‐precipitation of HCl, Al 2 O 3 treated via acid leaching with ammonia precipitation exhibited the largest amount of desorbed CO 2 (199.6 μmol/g) and possessed the highest surface O 2− basic site concentration, benefiting the CO 2 adsorption and glycerol reforming rate. As a consequence, the glycerol conversion slightly dropped from 56.7 % to 49 % during the first 30 h and maintained constant over the remaining 42 h at 800 °C [271] …”

“…As a consequence, the glycerol conversion slightly dropped from 56.7 % to 49 % during the first 30 h and maintained constant over the remaining 42 h at 800 °C. [271] Besides, sol-gel method is a common technique to prepare highly dispersed and small metal particles supported on Al 2 O 3 . When Ni/Al 2 O 3 was synthesized via sol-gel strategy, the improved basicity was seen from the higher vibration of À OH bonds in FTIR spectra, which contributed to a large amount of CO 2 adsorbed on the surface.…”

Chemical looping steam reforming of glycerol for hydrogen production over NiO–Fe2O3/Al2O3 oxygen carriers

“…46 Acrolein is decomposed by heating to produce H 2 , CH 4 , C 2 H 4 , C 3 H 6 , and other gases. The nal stage produced the CO. On the other hand, the breakage of the C-C bond leads to the removal of 1 mol of water from glycerol through the broken bond producing CH 2 O, CH 4 , and CO. 47,48 CO and H 2 O undergo water vapor conversion, while co reacts with 3 mol H 2 . The side reaction is the CO methanation reaction to produce CH 4 .…”