Enhanced trace pollutants removal efficiency and hydrogen production in rice straw gasification using hot gas cleaning system

Ngo, Thi Ngoc Lan Thao; Chiang, Kung Yuh; Wan, Hou Peng; Hung, Wen Chun; Liu, Chiung Fang

doi:10.1016/j.ijhydene.2018.07.133

Cited by 28 publications

(4 citation statements)

References 32 publications

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“…Syngas composition strongly depends on the type of feedstock and gasification agents. As an example, Thao et al 229 conducted air gasification of rice straw, which produced H 2 : 5–9 vol%, CO: 14–17 vol%, CO 2 : 32–37 vol%, CH 4 : 3–4 vol%, C x H y : <1 vol%, N 2 : 34–36 vol%, and trace pollutants such as HCl and H 2 S. Broer et al 230 conducted steam/oxygen gasification of switchgrass, resulting in a gas composition with H 2 : 15–25 vol%, CO: 30–35 vol%, CO 2 : 30–45 vol%, CH 4 : 5–15 vol%, C x H y : 1–5 vol%, N 2 : 2–10 vol%, and trace pollutants such as HCN and NH 3 . Various technical applications of syngas usually require strict gas composition.…”

Section: Underpinning Chemistries Of the Uses Of Biomass-derived Prod...mentioning

confidence: 99%

A review of the thermochemistries of biomass gasification and utilisation of gas products

Alves

Onwudili

Ghorbannezhad

et al. 2023

Sustainable Energy Fuels

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Section: Underpinning Chemistries Of the Uses Of Biomass-derived Prod...mentioning

confidence: 99%

A review of the thermochemistries of biomass gasification and utilisation of gas products

Alves

Onwudili

Ghorbannezhad

et al. 2023

Sustainable Energy Fuels

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“…In the literature, several models based on unreacted shrinking core or adsorption isotherms have been used to explain the adsorption of contaminants from a gas flow within a pseudo-steady reactor [26]. However, deactivation models often fit better for different pollutant uptakes, including the desulfurization reaction using ZnO sorbents [14,15,[17][18][19]21,22,26,27]. An activation model considers isothermal conditions, external mass-transfer limitations, and the presence of internal diffusion resistances.…”

Section: Theoretical Approach Of the Kinetic Deactivation Modelmentioning

confidence: 99%

Kinetic and Thermodynamic Study of the Wet Desulfurization Reaction of ZnO Sorbents at High Temperatures

et al. 2023

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Hot gas conditioning is a remarkable stage for decreasing typical and harsh contaminants of syngas produced in the biomass gasification process. Downstream contaminants containing hydrogen sulphide (H2S) can significantly deteriorate fuel stream conversion reactors and fuel cell systems. Thus, an effective gas cleaning stage is required to remove critical streams that endanger the whole pathway toward the biomass conversion process. In this work, we studied H2S capture from biofuel syngas by using a kinetic deactivation model to analyze the effect of the operating conditions on the adsorption performance. Furthermore, the particle sorbent influence on other reactions, such as methane reforming and water gas shift (WGS), were also evaluated. Breakthrough curves were plotted and fitted following a first-order linearized deactivation model to perform both the H2S adsorption capacity and thermodynamic analysis. Moreover, the influence of the operating conditions was studied through a breakthrough curve simulation. By using the Arrhenius and Eyring–Polanyi expressions, it was possible to calculate the activation energy and some thermodynamic parameters from the transition state theory. Finally, a mathematical analysis was performed to obtain the diffusion coefficient (D) and the kinetic reaction constant (k¯0) of H2S gas within ZnO particles, considering a spherical geometry.

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“…Mid-(400-600 °C) to high-temperature (600-850 °C) syngas cleaning technologies, which include sorbent technologies, are more suitable for syngas applications, since syngas has a high temperature, and carrying out the process at mid-to high-temperature allows achieving an optimum cycle efficiency and protects downstream equipment and catalysts [67,68].…”

Section: Gas Cleaning Technologiesmentioning

confidence: 99%

A Review of Hot Gas Cleaning Techniques for Hydrogen Chloride Removal from Biomass-Derived Syngas

2021

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Considering the pressing challenges of supply security and climate change, advanced processes to produce electricity and biofuels from biomass have to be developed. Biomass gasification is a very promising technology, but there is a lack of comprehensive reviews, specifically on the technologies for hydrogen chloride hot gas cleanup, which are necessary in order to work at the same temperature and respect the limits of advanced downstream components. In this review, the Cl content of the main biomasses in Europe is given, and data on syngas content and the tolerance of downstream equipment are highlighted. Hot gas cleaning technologies, which have the advantage of improved thermal efficiency are reviewed, analyzing the thermodynamic and primary and secondary methods. This review identifies NaAlO2 and Na2CO3 within 450–550 °C as the most effective sorbents, which are able to reduce the concentration of HCl below 1 ppm. Nevertheless, H2S cannot be simultaneously removed and has to be removed first, because it reduces the HCl adsorption sorbent capacity.

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Enhanced trace pollutants removal efficiency and hydrogen production in rice straw gasification using hot gas cleaning system

Cited by 28 publications

References 32 publications

A review of the thermochemistries of biomass gasification and utilisation of gas products

A review of the thermochemistries of biomass gasification and utilisation of gas products

Kinetic and Thermodynamic Study of the Wet Desulfurization Reaction of ZnO Sorbents at High Temperatures

A Review of Hot Gas Cleaning Techniques for Hydrogen Chloride Removal from Biomass-Derived Syngas

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