steam gasification
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Fuel ◽  
2022 ◽  
Vol 315 ◽  
pp. 123121
Author(s):  
Weiwei Xuan ◽  
Hailun Wang ◽  
Shuo Yan ◽  
Dehong Xia

2022 ◽  
Vol 227 ◽  
pp. 107118
Author(s):  
Saqr A.A. Al-Muraisy ◽  
Lais Americo Soares ◽  
Srirat Chuayboon ◽  
Shahrul Bin Ismail ◽  
Stéphane Abanades ◽  
...  

2022 ◽  
Vol 307 ◽  
pp. 118292
Author(s):  
Roberto Gabbrielli ◽  
Federica Barontini ◽  
Stefano Frigo ◽  
Luigi Bressan

Chemosphere ◽  
2022 ◽  
Vol 287 ◽  
pp. 132224
Author(s):  
Surendar Moogi ◽  
Seong-Ho Jang ◽  
Gwang Hoon Rhee ◽  
Chang Hyun Ko ◽  
Yong Jun Choi ◽  
...  

Author(s):  
Matthias Kuba ◽  
Florian Benedikt ◽  
Katharina Fürsatz ◽  
Josef Fuchs ◽  
Martin Demuth ◽  
...  

AbstractThe pulp and paper industry represents an industry sector which is characterised by its already high degree of sustainability. Biomass is a renewable input material, and typically highly developed recovery cycles minimise the loss of chemicals used in the pulping process. However, certain parts of the recovery cycle are still operated on fossil fuels. This study deals with the substitution of the fossil-based gaseous fuel with product gas from biomass gasification.Gasification experiments have shown that bark available at pulp and paper mills is suitable to produce a product gas via dual fluidised bed steam gasification as a promising substitute for natural gas. Based on the comparison of process layouts regarding the separation of non-process elements, separation efficiency is derived for different setups. To ensure operational security of the chemical recovery cycle, comprehensive gas cleaning including heat exchangers, a particle filter, and a liquid scrubber unit is advised. The gas flow of fuel gas into the gas burner is increased as the heating value of the product gas is accordingly lower in comparison to natural gas. Furthermore, adaptions of the gas burner might be necessary to address the earlier ignition of the H2-rich product gas compared to natural gas.


Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2178
Author(s):  
Jan A. Stasiek ◽  
Jacek Baranski ◽  
Marcin Jewartowski ◽  
Jan Wajs

The necessity of economical and rational use of natural energy sources caused a rapid development of research on the possibilities of using non-conventional energy resources. Taking the above into account, a new technological process of thermochemical conversion of biomass and communal waste, commonly known as High Temperature Air/Steam Gasification (HTA/SG) and Multi-Staged Enthalpy Extraction Technology (HTAG-MEET), was developed. In relation to traditional techniques of gasification or combustion of hydrocarbon fuels, the presented concept is characterized by higher thermal efficiency of the process, low emission of harmful compounds of carbon, sulfur, nitrogen, dioxins, furans and heavy metals. The use of a high-temperature gasification factor causes an increased thermochemical decomposition of solid fuels, biomass and municipal waste into gaseous fuel (syngas), also with increased hydrogen content and Lower Calorific Value (LCV). In this study, the possibility of using a batch type reactor (countercurrent gasifier) was analyzed for gasification of biomass and municipal waste in terms of energy recovery and environmental protection. The proposed research topic was aimed at examining the possibility of using the thermal utilization of biomass and municipal waste through their high-temperature decomposition in the presence of air, a mixture of air and steam. The main goals of the research were achieved during the implementation of several parallel stages of the schedule, which included, primarily: (a) study of the possibility of using thermal utilization of biomass and municipal waste through their high-temperature gasification in the presence of air or a mixture of air and steam and, secondary (b) analytical and numerical modeling of high-temperature gasification of biomass and municipal waste with the use of ANSYS CFD Fluent 6.3 software. Selected results of the experimental and numerical studies are properly presented. The higher temperature gasification concept shows the capability of this technology for maximizing the gaseous product yield in an up-draft fixed bed gasifier. It was also observed that at a high temperature, steam addition contributed to the thermal conversion of biofuels to gas with higher production of hydrogen.


Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7502
Author(s):  
Katarzyna Śpiewak ◽  
Grzegorz Czerski ◽  
Karol Bijak

This research aimed to assess the process conditions, temperature and pressure, on the gasification of alternative refuse-derived fuel (RDF) in the atmosphere of steam and carbon dioxide on a laboratory scale using a fixed bed reactor. For this reason, the selected RDF were analysed, including proximate and ultimate analysis, mercury content and ash composition. After that, isothermal gasification measurements using the thermovolumetric method were performed under various temperatures (700, 750, 800, 900 °C) and pressures (0.5, 1, 1.5 MPa), using steam and carbon dioxide as gasifying agents. The obtained results showed that in the entire analysed range, the increase in temperature positively affect both the steam and CO2 gasification of RDF. The formation rates of main components (H2 and/or CO) of the resulting gas, as well as yields of gas components and maximum carbon conversion degrees increase. However, this positive effect was the greater, the lower the process pressure was. In turn, the effect of pressure was more complex. In the case of RDF steam gasification, an increase in pressure had a negative effect on the process, while when using carbon dioxide as a gasifying agent, an improvement of most analysed parameters was observed; however, only at low temperatures, 700–750 °C.


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