Solid Oxide Fuel Cell System Utilizing Syngas from Coal Gasifiers

Ghezel-Ayagh, Hossein; Jolly, S.; Patel, Dilip; Stauffer, David

doi:10.1021/ie300841m

Cited by 16 publications

(5 citation statements)

References 8 publications

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“…For this, syngas (H 2 + CO) produced from biomass, waste, or natural gas is transformed into synthetic diesel fuel and gasoline by means of the Fischer− Tropsch (FT) process. 2 Syngas can also be employed for electricity generation in solid oxide fuel cells, 3 methanol production, 4 and dimethyl ether synthesis. 5 Steam reforming of methane (SRM, Scheme 1) is a commonly used industrial process to produce syngas.…”

Section: Introductionmentioning

confidence: 99%

Adjusting Process Variables in Methane Tri-reforming to Achieve Suitable Syngas Quality and Low Coke Deposition

Lino

Assaf

2020

Energy Fuels

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Tri-reforming of methane (TRM) combines steam reforming, dry reforming, and partial oxidation of CH 4 in a single reactor. The H 2 /CO product ratio usually ranges from 1.5 to 2.5, which makes the TRM process highly versatile, since the synthesis gas quality can be altered by simply changing the feed composition, hence permitting a wide range of applications. A H 2 /CO ratio of 2 is usually desired to produce liquid fuels such as methanol and dimethyl ether (DME). In this work, operational studies of the influence of the gas hourly space velocity (GHSV) and the feed composition were carried out, with the aim of obtaining an H 2 /CO ratio suitable for downstream processes, as well as to achieve satisfactory CO 2 conversion, which is vital for CCSU (CO 2 capture, storage, and utilization) strategies. The catalyst used for these studies was nickel supported on MgAl 2 O 4 spinels promoted with CeZrO 2 (Ce/Zr molar ratio = 4). Reaction tests were performed changing the O 2 /CO 2 and H 2 O/CO 2 molar ratios in the reactor feed, keeping the GHSV constant at 2.95 mol•g cat −1•h −1 . Each test was run for 5 h at 750 °C and atmospheric pressure. The increase of the O 2 /CO 2 molar ratio from 0 to 1.5 in the feed reduced the amount of coke by about 30-fold, while increasing the H 2 O/CO 2 molar ratio from 0 to 1.4 led to only an 8-fold decrease of carbon deposition, which showed that increasing the supply of oxygen was more effective for reducing the carbon deposition, compared to increasing the amount of water steam. The feed composition CH 4 / CO 2 /H 2 O/O 2 /N 2 = 3:1.5:1.4:0.25:1 (O 2 /CO 2 = 0.17) could be considered the most stable operational condition among those studied in this work, producing syngas with H 2 /CO ∼ 1.7 and significant CH 4 and CO 2 conversions (77 and 60%, respectively).

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Section: Introductionmentioning

confidence: 99%

Adjusting Process Variables in Methane Tri-reforming to Achieve Suitable Syngas Quality and Low Coke Deposition

Lino

Assaf

2020

Energy Fuels

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“…Various fuels can be used in SOFCs for power generation, including H2, CO, methane, syngas and other kinds of carbon-based fuel. Several groups have shown that SOFCs can operate directly on hydrocarbon fuels, including higher hydrocarbons (Kee, R J 2004, Ghezel-Ayagh H 2013 Well known SOFC suppliers including Fuel cell Energy, Bloom Energy, GE , MHI, etc. Among that the most commercially successful SOFC company should be Bloom Energy, whom sold 687 , 622 sets of 100KW SOFC system in 2016 and 2017, their SOFC systems have been installed and applied in numerous famous companies such as Apple, Coca-Cola and so on.…”

Section: Introductionmentioning

confidence: 99%

The effects of gasification technology on IGFC system efficiency

Jin

Guo³

et al. 2020

Preprint

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As one of the significant part of IGFC (integrated gasification fuel cell) system, coal gasification technology has an important effect on system efficiency as well as technological process. To figure out what kind of gasifier technology could benefit IGFC system most, we select two representative gasifiers for comparison, which are E-Gas gasifier and Shell gasifier. In this study MW-level E-gas IGFC system and Shell IGFC system models are developed respectively, moreover, the energy analysis of two systems are carried out simultaneously. The results show that SOFC DC Power efficiency and system net plant efficiency of E-gas IGFC system are 52.82% and 50.89% , both higher than Shell IGFC system, which are 49.24% and 49.74%; under the same design conditions, gasifier with high content of CH 4 would be easier to obtain higher SOFC power efficiency as well as system net efficiency. The present work is helpful to provide gasifier selection suggestions for large-scale IGFC system.

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“…Alkaline materials such as CaO have high sorption capacities and rapid kinetics, making them suitable candidates for CO 2 capture [2][3][4]. High temperature CO 2 capture by CaO has been studied in related works [5][6][7]; they demonstrate that warm CO 2 capture with calcium oxides is feasible for use in related industrial applications.…”

Section: Introductionmentioning

confidence: 99%