Superheated steam injection as primary measure to improve producer gas quality from biomass air gasification in an autothermal pilot-scale gasifier

2022 ◽  
Vol 181 ◽  
pp. 1223-1236
Author(s):  
D.T. Pio ◽  
H.G.M.F. Gomes ◽  
L.A.C. Tarelho ◽  
A.C.M. Vilas-Boas ◽  
M.A.A. Matos ◽  
...  
Keyword(s):  
Superheated Steam ◽  
Steam Injection ◽  
Pilot Scale ◽  
Producer Gas ◽  
Primary Measure

Studies on Increasing Specific Calorific Value of Producer Gas in Auto-gasification of Wooden Pallets by Steam Injection

2019 ◽  
pp. 59-70
Author(s):  
G. Prabakaran ◽  
S. Mathiyazhagan ◽  
C. V. Dinesh Kumar ◽  
N. Gunaseelan ◽  
V. Kirubakaran
Keyword(s):  
Calorific Value ◽  
Steam Injection ◽  
Producer Gas

scholarly journals Calculation model of on-way parameters and heating radius in a superheated steam injection wellbore

2010 ◽  
Vol 37 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Zhou Tiyao ◽  
Cheng Linsong ◽  
He Chunbai ◽  
Pang Zhanxi ◽  
Zhou Fengjun
Keyword(s):  
Superheated Steam ◽  
Steam Injection ◽  
Calculation Model

scholarly journals Simulation of Producer Gas Fired Power Plants with Inlet Fog Cooling and Steam Injection

2006 ◽  
Vol 129 (3) ◽  
pp. 637-647 ◽  
Author(s):  
Mun Roy Yap ◽  
Ting Wang
Keyword(s):  
Natural Gas ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Power Output ◽  
Power Plants ◽  
Steam Injection ◽  
Combined Cycle ◽  
Producer Gas ◽  
Turbine Inlet ◽  
Cycle Systems

Biomass can be converted to energy via direct combustion or thermochemical conversion to liquid or gas fuels. This study focuses on burning producer gases derived from gasifying biomass wastes to produce power. Since the producer gases are usually of low calorific values (LCV), power plant performance under various operating conditions has not yet been proven. In this study, system performance calculations are conducted for 5MWe power plants. The power plants considered include simple gas turbine systems, steam turbine systems, combined cycle systems, and steam injection gas turbine systems using the producer gas with low calorific values at approximately 30% and 15% of the natural gas heating value (on a mass basis). The LCV fuels are shown to impose high compressor back pressure and produce increased power output due to increased fuel flow. Turbine nozzle throat area is adjusted to accommodate additional fuel flows to allow the compressor to operate within safety margin. The best performance occurs when the designed pressure ratio is maintained by widening nozzle openings, even though the turbine inlet pressure is reduced under this adjustment. Power augmentations under four different ambient conditions are calculated by employing gas turbine inlet fog cooling. Comparison between inlet fog cooling and steam injection using the same amount of water mass flow indicates that steam injection is less effective than inlet fog cooling in augmenting power output. Maximizing steam injection, at the expense of supplying the steam to the steam turbine, significantly reduces both the efficiency and the output power of the combined cycle. This study indicates that the performance of gas turbine and combined cycle systems fueled by the LCV fuels could be very different from the familiar behavior of natural gas fired systems. Care must be taken if on-shelf gas turbines are modified to burn LCV fuels.

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.

Lab-scale and pilot-scale two-stage gasification of biomass using active carbon for production of hydrogen-rich and low-tar producer gas

2020 ◽  
Vol 198 ◽  
pp. 106240 ◽  
Author(s):  
Yong-Seong Jeong ◽  
Young-Kon Choi ◽  
Bo-Sung Kang ◽  
Jae-Hong Ryu ◽  
Hyo-Sik Kim ◽  
...  
Keyword(s):  
Active Carbon ◽  
Pilot Scale ◽  
Producer Gas ◽  
Two Stage ◽  
Production Of Hydrogen

scholarly journals An integrated heat efficiency model for superheated steam injection in heavy oil reservoirs

2019 ◽  
Vol 74 ◽  
pp. 7 ◽  
Author(s):  
Congge He ◽  
Anzhu Xu ◽  
Zifei Fan ◽  
Lun Zhao ◽  
Angang Zhang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Superheated Steam ◽  
Steam Injection ◽  
Injection Rate ◽  
Total Heat ◽  
Oil Reservoirs ◽  
Injection Time ◽  
New Model ◽  
Heat Efficiency ◽  
Heavy Oil Reservoirs

Accurate calculation of heat efficiency in the process of superheated steam injection is important for the efficient development of heavy oil reservoirs. In this paper, an integrated analytical model for wellbore heat efficiency, reservoir heat efficiency and total heat efficiency was proposed based on energy conservation principle. Comparisons have been made between the new model results, measured data and Computer Modelling Group (CMG) results for a specific heavy oil reservoir developed by superheated steam injection, and similarity is observed, which verifies the correctness of the new model. After the new model is validated, the effect of injection rate and reservoir thickness on wellbore heat efficiency and reservoir heat efficiency are analyzed. The results show that the wellbore heat efficiency increases with injection time. The larger the injection rate is, the higher the wellbore heat efficiency. However, the reservoir heat efficiency decreases with injection time and the injection rate has little impact on it. The reservoir thickness has no effect on wellbore heat efficiency, but the reservoir heat efficiency and total heat efficiency increase with the reservoir thickness rising.

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