Experimental investigation of a multi-stage air-steam gasification process for hydrogen enriched gas production

2010 ◽  
Vol 36 (3) ◽  
pp. 335-345 ◽  
Author(s):  
Sompop Jarungthammachote ◽  
Animesh Dutta
Keyword(s):  
Experimental Investigation ◽  
Gas Production ◽  
Steam Gasification ◽  
Gasification Process ◽  
Multi Stage

scholarly journals Experimental Investigation on Multi-Stage Downdraft Gasification: Influence of Air Ratio and Equivalent Ratio to the Gasifier Performance

2017 ◽  
Author(s):  
arif rahman saleh ◽  
Bambang Sudarmanta
Keyword(s):  
Experimental Investigation ◽  
Partial Oxidation ◽  
Air Flow ◽  
Pyrolysis Product ◽  
Heat Energy ◽  
Air Injection ◽  
Pyrolysis Products ◽  
Gasification Process ◽  
Multi Stage ◽  
The Mean

Multi-stage gasification process adding multiple air injection (at pyrolysis and oxidation) to reduce tar content and improve the efficiency. all components of the fuel can decompose perfectly into pyrolysis products and the total pyrolysis product also increases. The mean temperatures in the pyrolysis zone are respectively between 569oC and 633oC for the 0% and 90% Air Ratios. Temperature increases in the pyrolysis zone change the nature of the endothermal into exothermal and providing the heat energy for the drying, oxidation and reduction zones. While the temperature of the partial oxidation zone reaches 858oC. For a total air flow of 10.5 Nm3/h with a 90% air ratio, the gasifier can produce a low tar content of 32.27 mg/Nm3 when compared to 0% air ratio of 106.5 mg/Nm3. This result shown that multi-stage gasifier can reduce tar content by 30%.

Catalytic steam gasification of pig compost for hydrogen-rich gas production in a fixed bed reactor

2013 ◽  
Vol 133 ◽  
pp. 127-133 ◽  
Author(s):  
Jingbo Wang ◽  
Bo Xiao ◽  
Shiming Liu ◽  
Zhiquan Hu ◽  
Piwen He ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Gas Production ◽  
Steam Gasification ◽  
Fixed Bed Reactor

scholarly journals CFD researched on rice husk gasification in a pilot fixed bed up-draft system

2016 ◽  
Vol 19 (3) ◽  
pp. 96-109
Author(s):  
Phung Thi Kim Le ◽  
Viet Tan Tran ◽  
Thien Luu Minh Nguyen ◽  
Viet Vuong Pham ◽  
Truc Thanh Nguyen ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Rice Husk ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Fixed Bed ◽  
Steam Gasification ◽  
Actual Process ◽  
Ansys Fluent ◽  
Alternative Energy Sources ◽  
Gasification Process

Finding alternative energy sources for fossil fuels was a global matter of concern, especially in developing countries. Rice husk, an abundant biomass in Viet Nam, was used to partially replace fossil fuels by gasification process. The study was conducted on the pilot plant fixed bed up-draft gasifier with two kind of gasification agents, pure air and air-steam mixture. Mathematical modeling and computer simulations were also used to describe and optimize the gasification processes. Mathematical modeling was based on Computational Fluid Dynamics method and simulation was carried by using Ansys Fluent software. Changes in outlet composition of syngas components (CO, CO2, CH4, H2O, H2) and temperature of process, in relation with ratio of steam in gasification agents, were presented. Obtained results indicated concentration of CH4, H2 in outlet was increased significantly when using air-steam gasification agents than pure air. The discrepancies among the gasification agents were determined to improve the actual process.

scholarly journals A Review of Hydraulic Fracturing Simulation

2021 ◽  
Author(s):  
Bin Chen ◽  
Beatriz Ramos Barboza ◽  
Yanan Sun ◽  
Jie Bai ◽  
Hywel R Thomas ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
State Of The Art ◽  
Numerical Models ◽  
Gas Production ◽  
Physical Processes ◽  
Horizontal Drilling ◽  
Improve Treatment ◽  
Multi Stage ◽  
Pros And Cons ◽  
Treatment Designs

AbstractAlong with horizontal drilling techniques, multi-stage hydraulic fracturing has improved shale gas production significantly in past decades. In order to understand the mechanism of hydraulic fracturing and improve treatment designs, it is critical to conduct modelling to predict stimulated fractures. In this paper, related physical processes in hydraulic fracturing are firstly discussed and their effects on hydraulic fracturing processes are analysed. Then historical and state of the art numerical models for hydraulic fracturing are reviewed, to highlight the pros and cons of different numerical methods. Next, commercially available software for hydraulic fracturing design are discussed and key features are summarised. Finally, we draw conclusions from the previous discussions in relation to physics, method and applications and provide recommendations for further research.

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