Producer Gas Composition and NOxEmissions from a Pilot-Scale Biomass Gasification and Combustion System Using Feedstock with Controlled Nitrogen Content

2011 ◽  
Vol 25 (2) ◽  
pp. 813-822 ◽  
Author(s):  
Sharan Sethuraman ◽  
Cuong Van Huynh ◽  
Song-Charng Kong
Keyword(s):  
Nitrogen Content ◽  
Biomass Gasification ◽  
Pilot Scale ◽  
Producer Gas ◽  
Gas Composition ◽  
Combustion System

Biomass Gasification in a Pilot-Scale Gasifier

2014 ◽  
Author(s):  
Yunye Shi ◽  
Tejasvi Sharma ◽  
Guiyan Zang ◽  
Albert Ratner
Keyword(s):  
Gas Chromatography ◽  
Mass Balance ◽  
Biomass Gasification ◽  
Pilot Scale ◽  
Producer Gas ◽  
Gas Composition ◽  
Operational Parameters ◽  
Gas Generation ◽  
Gas Concentration ◽  
Corn Kernels

A study of the gasification of corn kernels has been performed on an experimental, pilot-scale (50–100 lbs/hour) gasification unit. Analysis was made on the performance of the gasifier in terms of producer gas generation and composition, char production and process mass balance. In these experiments corn kernels was used so that the shapes and sized of the materials did not influence the results. Experiments were conducted with varying temperature of fuel bed. For each experimental condition, the permanent gas composition was measured continuously by gas chromatography (GC). Tar was collected according to CEN Standard. Bio-char were weighted for mass balance. The results from the study indicate that there were differences between various operational parameters in terms of producer gas concentration and char percentage.

Simulation of High Temperature Air – Steam Biomass Gasification in a Downdraft Gasifier Using ASPEN PLUS

2012 ◽  
Vol 267 ◽  
pp. 57-63
Author(s):  
Worapot Ngamchompoo ◽  
Kittichai Triratanasirichai
Keyword(s):  
High Temperature ◽  
Process Model ◽  
Waste Heat ◽  
Aspen Plus ◽  
Biomass Gasification ◽  
Pilot Scale ◽  
Producer Gas ◽  
Downdraft Gasifier ◽  
High Heating Value ◽  
Cold Gas Efficiency

A comprehensive process model is developed for high temperature air – steam biomass gasification in a downdraft gasifier using the ASPEN PLUS simulator. The simulation results are compared with the experimental data obtained through pilot scale downdraft gasifier. In this study, the model is used to investigate the effects of gasifying agent preheating, equivalence ratio (ER), and steam/biomass (S/B) on producer gas composition, high heating value (HHV), and cold gas efficiency (CGE). Results indicate that H2 and CO contents have increased when gasifying agent preheating is used, while gasifying agent preheating has no effect with H2 and CO at high ER. At high level of S/B, the concentrations of H2 and CO are related with water-gas shift reaction in significant. HHV and CGE depend on the concentrations of H2 and CO in producer gas, which can increase by preheated gasifying agent. However, gasifying agent preheating should apply with waste heat from the process because there is no additional cost of energy price.

scholarly journals Combustion characterization of producer gas from biomass gasification

2013 ◽  
Vol 14 (2) ◽  
pp. 125-132 ◽  
Keyword(s):  
Stability Region ◽  
Experimental Tests ◽  
Biomass Gasification ◽  
Steam Gasification ◽  
Oh Radicals ◽  
Flame Stability ◽  
Producer Gas ◽  
Gas Composition

In the present work, premixed flames from the combustion of producer gas have been analyzed. Two different compositions have been tested, corresponding to air and steam gasification processes (the latter leading to a better quality gas due to its higher CO and H2 concentration and its lower N2 content). The main objectives of the work have been the determination of the flame stability region (placed between the flashback and the blowoff limits) for each producer gas composition, as well as the study of the OH and CH radicals. The combustion experimental tests have been carried out by using an atmospheric burner and a chemiluminescence camera. The results obtained show that producer gas coming from biomass entrained-flow steam gasification seems to be more adequate to be used in combustion systems, since it provides a larger flame stability region, and its blowoff limit for a given relative producer gas/air ratio is higher (which enable to obtained more power). From the study of CH and OH radicals, it can be deduced that it is possible to reduce the nitrogen oxides emissions up to 18.6 and 15.2 % with producer gas from steam gasification and air gasification respectively by using lean mixtures (while keeping the flame stability).

scholarly journals CO2 Capture from Biomass Gasification Producer Gas Using a Novel Calcium and Iron-Based Sorbent through Carbonation–Calcination Looping

2020 ◽  
Vol 59 (41) ◽  
pp. 18447-18459
Author(s):  
Forogh Dashtestani ◽  
Mohammad Nusheh ◽  
Vilailuck Siriwongrungson ◽  
Janjira Hongrapipat ◽  
Vlatko Materic ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Iron Based

Measurements of the Laminar Burning Velocities for Typical Syngas–Air Mixtures at Elevated Pressures

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Eliseu Monteiro ◽  
Abel Rouboa
Keyword(s):  
Energy Source ◽  
Equivalence Ratio ◽  
Functional Form ◽  
Burning Velocity ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Volume Percentage ◽  
Elevated Pressures ◽  
Syngas Combustion ◽  
Heat Value

In the currently reported work, three typical mixtures of H2, CO, CH4, CO2, and N2 have been considered as representative of the producer gas (syngas) coming from biomass gasification. Syngas is being recognized as a viable energy source worldwide, particularly for stationary power generation. However, there are gaps in the fundamental understand of syngas combustion characteristics, especially at elevated pressures that are relevant to practical combustors. In this work, constant volume spherical expanding flames of three typical syngas compositions resulting from biomass gasification have been employed to measure the laminar burning velocities for pressures ranges between 1.0 and 20 bar tanking into account the stretch effect on burning velocity. Over the ranges studied, the burning velocities are fit by a functional form Su=Su0(T/T0)α(P/P0)β; and the dependencies of α and β upon the equivalence ratio of mixture are also given. Conclusion can be drawn that the burning velocity decreases with the increase of pressure. In opposite, an increase in temperature induces an increase of the burning velocity. The higher burning velocity value is obtained for downdraft syngas. This result is endorsed to the higher heat value, lower dilution and higher volume percentage of hydrogen in the downdraft syngas.

Analysis of Combustion Flame of Syngas-Air Mixtures

2010 ◽  
Author(s):  
Eliseu Monteiro ◽  
Abel Rouboa
Keyword(s):  
Energy Source ◽  
Burning Velocity ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Laminar Burning Velocity ◽  
Volume Percentage ◽  
Elevated Pressures ◽  
Syngas Combustion ◽  
Fundamental Understanding ◽  
Heat Value

In the proposed paper for this conference, three typical mixtures of H2, CO, CH4, CO2 and N2 have been considered as representative of the producer gas (syngas) resulting from biomass gasification. Syngas is being recognized worldwide as a viable energy source, particularly for stationary power generation. However, there are gaps in the fundamental understanding of syngas combustion characteristics, particularly at elevated pressures that are relevant to practical combustors. In this work, constant volume spherical expanding flames of three typical syngas compositions have been employed to measure the laminar burning velocity for pressures ranges between 1.0 and 20 bar. Over the ranges studied, the burning velocities are fitted by the functional formula of Metghalchi and Keck. Conclusion can be drawn that the burning velocity decreases with the increase of pressure. In opposite, the increase of temperature induces the increase of burning velocity. The higher burning velocity value is obtained for the downdraft syngas. This result is endorsed to the higher heat value, lower dilution and higher volume percentage of hydrogen in the downdraft syngas.

Removal of NH3from Biomass Gasification Producer Gas by Water Condensing in an Organic Solvent Scrubber

2005 ◽  
Vol 44 (5) ◽  
pp. 1576-1584 ◽  
Author(s):  
Tobias Pröll ◽  
Ingmar G. Siefert ◽  
Anton Friedl ◽  
Hermann Hofbauer
Keyword(s):  
Organic Solvent ◽  
Biomass Gasification ◽  
Producer Gas
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