Papers by Keyword: Water Gas Shift

Abstract: This research discusses the biomass gasification process for hydrogen production, integrated with a carbon capture process for product purification. A new simulation model was developed in Aspen Plus, incorporating a gasifier, a water–gas shift (WGS) reactor, and a carbon capture unit. Oil palm empty fruit bunches were selected as the biomass feedstock. The simulation investigated the effects of different gasification agents (O₂, air, and steam) and gasifier operating temperatures on hydrogen yield. It also evaluated the influence of MDEA solvent flow rate on CO₂ capture efficiency. Results showed that using a mixture of O₂ and steam with a ratio of 0.5 at 800 °C produced favorable outcomes, with negligible impurities. The addition of steam in the WGS reactor enhanced hydrogen production, with the highest yield achieved at a steam ratio of 0.6. A 2:1 molar ratio of MDEA to CO₂ resulted in up to 99.9% carbon dioxide removal.

Abstract: AuNP (gold nanoparticle) supported by oxide shows a high reactivity for a PROX (preferential oxiation) reaction at low temperature. Au catalysts were usually prepared by conventional methods such as precipitation, impregnation and vapor phase grafting. In this study, we developed a novel method for the preparation of AuNPs supported on a bimodal nanoporous alumina. The AuNPs were prepared in a toluene phase by the modified Brust method. The metal particle size was able to be controlled from 2 to 50 nm via the control of the surfactant concentrations. The resulting materials were characterized by BET, FE-SEM, TEM, and XRD analyses. After calcinations at 700oC, AuNP/Al2O3 catalyst revealed a bimodal nanoporous structure, with the pore sizes of 3.5 and 7 nm, and demonstrated both a high surface area (350 m2/g) and pore volume (0.9 cm3/g).