Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

Xiao, Xianbin; Wang, Xueying; Zheng, Zongming; Wu, Qin; Zhou, Yumengqiu

doi:10.3390/en12071367

Cited by 10 publications

(9 citation statements)

References 24 publications

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“…The average syngas content was 62.79 vol.% in sawdust gasification, 52.26 vol.% in coal gasification and 64.12 vol.% in SRF gasification. Generally, efficiencies and syngas production rate from coal gasification with entrained flow gasifier shows higher value compared to other feedstocks [26,27]. However, in this study coal gasification showed lower syngas yield and efficiencies than typical coal gasification.…”

Section: Characteristics Of Feedstockscontrasting

confidence: 54%

“…The optimum ER condition showed the optimum result under the ER value 0.4, which is similar for both sawdust and SRF gasification. In the case of coal gasification, it shows similar efficiencies between ER 0.4 and 0.6 from reference data [26].…”

Section: Gasification Efficiencysupporting

confidence: 52%

“…Fixed bed gasifiers are not preferred in coal gasification, due to its low product gas yield by low reactivity of coal. Because of these reasons, experimental data from fixed bed coal gasification were not reported in Figure 9, rather a standard coal gasification result was reported from reference [26].…”

Section: Gasification Efficiencymentioning

confidence: 99%

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Gasification Applicability of Korean Municipal Waste Derived Solid Fuel: A Comparative Study

et al. 2020

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Gaining energy independence by utilizing new and renewable energy resources has become imperative for Korea. Energy recovery from Korean municipal solid waste (MSW) could be a promising option to resolve the issue, as Korean MSW is highly recyclable due to its systematic separation, collection and volume-based waste disposal system. In this study, gasification experiments were conducted on Korean municipal waste-derived solid fuel (SRF) using a fixed bed reactor by varying the equivalence ratio (ER) to assess the viability of syngas production. Experiments were also conducted on coal and biomass under similar conditions to compare the experimental results, as the gasification applicability of coal and biomass are long-established. Experimental results showed that Korean SRF could be used to recover energy in form of syngas. In particular, 50.94% cold gas efficiency and 54.66% carbon conversion ratio with a lower heating value of 12.57 MJ/Nm3 can be achieved by gasifying the SRF at 0.4 ER and 900 °C. However, compared to coal and biomass, the syngas efficiency of Korean SRF was less, which can be resolved by operating the gasification processes at high temperatures. If proper research and development activities are conducted on Korean SRF, it could be a good substitute for fossil fuels in the future.

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Section: Characteristics Of Feedstockscontrasting

confidence: 54%

Section: Gasification Efficiencysupporting

confidence: 52%

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Gasification Applicability of Korean Municipal Waste Derived Solid Fuel: A Comparative Study

et al. 2020

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“…(1) The entail gasification process is steady state and all considered reactions can achieve chemical equilibrium [36][37][38]. Although there are some slightly differences between these assumptions and the practical process conditions, they are considered reasonable and acceptable by the by comparison in Section 3.1.…”

Section: Assumptions and Stream Parametersmentioning

confidence: 99%

Process Simulation of Co-Gasification of Raw Municipal Solid Waste and Bituminous Coal in CO2/O2 Atmosphere

Ding

2020

Applied Sciences

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An integrated CO2/O2 co-gasification system of municipal solid waste (MSW) and bituminous coal (BC) with CO2 capture was developed and simulated by the Aspen plus, which mainly consisted of three processes: air separation unit, co-gasification system, and CO2 absorption unit. In addition, raw syngas composition, cold gas efficiency (CGE), and overall energy efficiency (OEE) of the entail system were evaluated in detail with respect to the main operating parameters (gasification temperature, T; oxygen equivalence ratio, Ro; mole of CO2 to carbon ratio, Rc; and the MSW blending ratio, RM). The results indicated that the addition of BC improved the gasification of MSW. Higher gasification temperature increased CGE and OEE. Increasing the Rc ratio led to the decrease of H2 mole fraction due to the enhanced reverse water-gas shift reaction. In addition, the CGE and OEE of the system decreased with increasing RM. From the analyses of the parameters, the most optimal operating conditions were set as T = 900 °C, Ro = 0.2, Rc = 0.5, and RM = 0.6, and the corresponding OEE of the system reached 0.57. The system can achieve a large processing capacity of MSW at the cost of the efficiency loss of this condition.

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“…The ASPEN simulation of the catalytic co-gasification of coal and organic wastewater with an alkaline pH was investigated by Xiao et al (2019) using a fluidised bed gasifier. The findings revealed that the optimal ratio of steam to coal, temperature, and equivalence ratio for the process.…”

Section: Introductionmentioning

confidence: 99%

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

Oladokun

Nyakuma

2020

Preprint

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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.

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Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

Cited by 10 publications

References 24 publications

Gasification Applicability of Korean Municipal Waste Derived Solid Fuel: A Comparative Study

Gasification Applicability of Korean Municipal Waste Derived Solid Fuel: A Comparative Study

Process Simulation of Co-Gasification of Raw Municipal Solid Waste and Bituminous Coal in CO2/O2 Atmosphere

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

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