Hydrogen-rich gas production via CaO sorption-enhanced steam gasification of rice husk: a modelling study

Abstract

Gasification is a thermochemical process in which solid or liquid fuels are transformed into synthesis gas through partial oxidation. In this paper, a kinetic model of rice husk gasification has been developed, which is interesting for the applications of the syngas produced. It is a zero-dimensional, steady-state model based on global reaction kinetic, empirical correlation of pyrolysis and is capable of predicting hydrogen yield in the presence of sorbent CaO. The model can also be used as a useful tool to investigate the influence of process parameters including steam/biomass ratio, CaO/fuel ratio (CaO/Fuel), and gasification temperature on hydrogen efficiency, CO2 capture ratio (CCR), and average carbonation conversion (Save). Similar to hydrogen formation, CCR also increases with increasing CaO/Fuel, but an opposite trend is exhibited in Save. Model predictions were compared with available data from the literature, which showed fairly good agreement.

A detailed study of oxy-fuel combustion of biomass in a circulating fluidized bed (CFB) combustor: Evaluation of catalytic performance of metal nanoparticles (Al, Ni) for combustion efficiency improvement

“…Moreover, it is obvious that the emission of CO 2 increases with increasing the amount of O 2 /CO 2 . CO 2 capture from combustion process is one of most important challenges of researchers to mitigate climate change [8]. There are many ways in which CO 2 emissions can be reduced i.e., high pressure water absorption, combustion in presence of calcium oxide, oxy-fuel combustion, and electrical absorption.…”

Hydrogen Production from Co‐Gasification of Coal and Biomass in the Presence of CaO as a Sorbent

“…where M fuel and M moisture are the mass of dry fuel and moisture content of feedstocks entering the gasifier, M steam is the mass of fluidizing steam, M CaO is the mass of sorbent adding the gasifier, is the mass of produced hydrogen, M C,residue is the mass of carbon in gasification residue (kmol), and M C,fuel denotes the mass of carbon in feedstock (kmol). The value of 0.4 is selected as the optimal equivalence ratio, the so‐called stoichiometric ratio, because this value is considered as the optimum ratio to achieve the highest gas caloric value by other authors .…”

“…Similar approaches have been done by other authors , . Nikoo and Mahinpey and Beheshti et al also developed an Aspen Plus model for syngas production from biomass gasification with consideration of hydrodynamic characterstics and rate of reactions.…”

“…Yan et al showed that the mass percentage of hydrogen generated from steam reforming of bio oil in the presence of CaO is considerably higher than that of hydrogen production with the addition of water to bio oil. Beheshti et al developed a zero‐dimensional mathematical model of steam gasification of rice husk and stated that the CO 2 capture ratio increased with enhancing the CaO/fuel ratio ( CaO/F ), but an opposite trend was obtained in the average carbonation conversion.…”

Hydrogen Medicine Therapy: An Effective and Promising Novel Treatment for Multiple Organ Dysfunction Syndrome (MODS) Induced by Influenza and Other Viral Infections Diseases?

“…Last but not least, as H2 is an endogenous substance, the goal of better tissue compatibility than other anti-viral drugs can be achieved [54][55][56].…”