scholarly journals Air-Steam Gasification of Nigerian Lignite Coals for Hydrogen and Syngas Production

2020 ◽  
Author(s):  
Olagoke Oladokun ◽  
Bemgba B. Nyakuma
Keyword(s):  
Emerging Economies ◽  
Carbon Capture ◽  
Gas Production ◽  
Steam Gasification ◽  
Operating Conditions ◽  
Gas Composition ◽  
Carbon Capture And Sequestration ◽  
Syngas Production ◽  
Highly Sensitive ◽  
Harmful Effects

Abstract Coal is the fuel that drives most emerging economies. The gasification along with carbon capture and sequestration could ameliorate the harmful effects of coal utilisation. In this study, two recently discovered lignite coals; Obomkpa (BMK) and Ihioma (IHM) were examined for hydrogen and synthesis gas production through air-steam gasification using a non-stoichiometric model simulated in ASPEN Plus. The results showed that H2 production from BMK and IHM was highly sensitive to temperature and air but moderately sensitive to steam during gasification. The optimal operating conditions for BMK and IHM are; temperature 1125 °C and 1350 °C; equivalence ratio (ER) 0.26 and 0.26; steam/carbon ratio (S/C) 2.25 and 2.19, respectively. The optimal gas composition for BMK was; H2 (0.66), CO (0.18) and CO2 (0.18) mole-fraction, whereas for IHM was; H2 (0.65), CO (0.17) and CO2 (0.17). The findings indicate that both lignite coals are suitable feedstock for H2 and syngas production.

scholarly journals Syngas Production from Combined Steam Gasification of Biochar and a Sorption-Enhanced Water–Gas Shift Reaction with the Utilization of CO2

Processes ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 349 ◽  
Author(s):  
Supanida Chimpae ◽  
Suwimol Wongsakulphasatch ◽  
Supawat Vivanpatarakij ◽  
Thongchai Glinrun ◽  
Fasai Wiwatwongwana ◽  
...  
Keyword(s):  
Synthesis Gas ◽  
Gas Production ◽  
Steam Gasification ◽  
Water Gas Shift ◽  
Similar Amount ◽  
Water Gas Shift Reaction ◽  
Syngas Production ◽  
Shift Reaction ◽  
Water Gas ◽  
Gasification Temperature

This research aims at evaluating the performance of a combined system of biochar gasification and a sorption-enhanced water–gas shift reaction (SEWGS) for synthesis gas production. The effects of mangrove-derived biochar gasification temperature, pattern of combined gasification and SEWGS, amount of steam and CO2 added as gasifying agent, and SEWGS temperature were studied in this work. The performances of the combined process were examined in terms of biochar conversion, gaseous product composition, and CO2 emission. The results revealed that the hybrid SEWGS using one-body multi-functional material offered a greater amount of H2 with a similar amount of CO2 emissions when compared with separated sorbent/catalyst material. The gasification temperature of 900 °C provided the highest biochar conversion of ca. 98.7%. Synthesis gas production was found to depend upon the amount of water and CO2 added and SEWGS temperature. Higher amounts of H2 were observed when increasing the amount of water and the temperature of the SEWGS system.

scholarly journals Effect of biomass fuel ash and bed material on the product gas composition in DFB steam gasification

Energy ◽  
2021 ◽  
Vol 219 ◽  
pp. 119650
Author(s):  
K. Fürsatz ◽  
J. Fuchs ◽  
F. Benedikt ◽  
M. Kuba ◽  
H. Hofbauer
Keyword(s):  
Steam Gasification ◽  
Biomass Fuel ◽  
Gas Composition ◽  
Product Gas ◽  
Fuel Ash ◽  
Bed Material

Syngas Production from Two-Stage Sorption-Enhanced Steam Gasification of Sewage Sludge over Bifunctional Ni-Ca Catalyst

2021 ◽  
Vol 35 (6) ◽  
pp. 4997-5005
Author(s):  
Xiaoxia Yang ◽  
Shengshen Gu ◽  
Amanj Kheradmand ◽  
Yijiao Jiang
Keyword(s):  
Sewage Sludge ◽  
Steam Gasification ◽  
Two Stage ◽  
Syngas Production
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