Validation of a Fixed Bed Reactor Model for Dimethyl Ether Synthesis Using Pilot-Scale Plant Data

Song, Daesung; Cho, Sung Yong; Vu, Thang Toan; Duong, Yen Hoang Phi; Kim, Eunkyu

doi:10.3390/catal11121522

Cited by 6 publications

(5 citation statements)

References 39 publications

(44 reference statements)

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“…Therefore, in STD synthesis, consideration of H 2 /CO ratios above 1 can ensure improved syngas conversion rates. As also evident in the work of Song et al, 36 increasing the ratio to 1.3 leads to an increase in the CO conversion and DME yield. Also, other authors 15,37−40 have experimentally found that the H 2 /CO ratios up to 2 enhance the conversion rate when the feed contains CO 2 in addition to H 2 and CO.…”

Section: Theoretical Background and Considerationssupporting

confidence: 67%

“…In STD synthesis, keeping low concentrations of CO 2 in the feed at 4–6 mol % has a positive impact on DME productivity; however, higher amounts reduce CO conversion due to the influence on the WGS reaction . Besides, it has been reported that the presence of CO 2 in the feed reduces the maximum temperature in the reactor bed, thereby ensuring a safer operation . Here, the CO 2 mole fraction was adjusted within a range of 7.0–7.5 and 6.0–6.5% in the STM and STD reactors, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…41 Besides, it has been reported that the presence of CO 2 in the feed reduces the maximum temperature in the reactor bed, thereby ensuring a safer operation. 36 Here, the CO 2 mole fraction was adjusted within a range of 7.0−7.5 and 6.0−6.5% in the STM and STD reactors, respectively. The type of kinetic reactors was considered a fixed bed tubular reactor, in which the feed flows axially through the catalyst-filled tubes and the reaction heat is removed by boiling feedwater, which flows on the shell side and leaves the reactor as a medium pressure steam.…”

Section: Theoretical Background and Considerationsmentioning

confidence: 99%

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Gasoline Synthesis from Biomass-Derived Syngas Comparing Different Methanol and Dimethyl Ether Pathways by Process Simulation, Based on the Bioliq Process

E-Moghaddam,

Dahmen,

Santo

et al. 2024

Energy Fuels

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In the bioliq process, biomass is converted to gasoline over four steps including pyrolysis, synthesis gas (syngas) generation via gasification, gas cleaning, and gasoline synthesis via dimethyl ether (DME). This work aims to investigate the gasoline synthesis plant of the bioliq process and also alternative process routes for the conversion of biomass-derived syngas to gasoline via methanol (MeOH) and DME pathways by process simulation in Aspen Plus, using a syngas composition adapted from the bioliq plant and enhanced with makeup H 2 . The simulations were established using kinetic models for MeOH, DME, and water−gas shift (WGS) synthesis based on selected models from the literature and component yield models for MeOH/DME to gasoline (MTG/ DTG) reactions based on product characteristics from known gasoline synthesis plants. The selected process routes were compared regarding product mass and energetic efficiencies and H 2 and CO 2 balances. The results showed that an optimized bioliq process, i.e., biofuel synthesis via direct DME synthesis with a WGS unit for makeup H 2 supply, is efficient in terms of syngas conversion and gasoline productivity, although it has a drawback concerning CO 2 generation. For this process, the mass and chemical energy efficiencies of gasoline based on syngas were calculated to be approximately 15 and 65%, respectively. Comparatively, for the similar process via the MeOH pathway, these efficiencies were found to be 11 and 50%, respectively. The CO and H 2 conversion rates for gasoline synthesis via DME were found to be about 77 and 64%, respectively, whereas via MeOH, they were obtained as ca. 48 and 28%, respectively. Additionally, the optimized process was scaled up for production of 100,000 tons/year gasoline and evaluated based on mass and chemical energy and CO 2 and element (hydrogen, carbon, and oxygen) balances. Here, the mass and chemical energy efficiencies of gasoline based on biomass feed were calculated to be 13 and 35%, respectively.

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Section: Theoretical Background and Considerationssupporting

confidence: 67%

Section: Methodsmentioning

confidence: 99%

Section: Theoretical Background and Considerationsmentioning

confidence: 99%

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Gasoline Synthesis from Biomass-Derived Syngas Comparing Different Methanol and Dimethyl Ether Pathways by Process Simulation, Based on the Bioliq Process

E-Moghaddam,

Dahmen,

Santo

et al. 2024

Energy Fuels

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“…Therefore, scale-up is conducted by multiple tubes arranged in parallel (multitubular reactor) with an external cooling facility. 176,177 Still, it has the advantage of working in the adiabatic regime. Farsi et al have modeled isothermal and adiabatic reactors to establish a reducing temperature profile for the methanol to DME process.…”

Section: Catalysis Science and Technology Reviewmentioning

confidence: 99%

CO₂ to dimethyl ether (DME): structural and functional insights of hybrid catalysts

Ghosh,

Nag,

Chatterjee

et al. 2024

Catal. Sci. Technol.

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“…In order to further enhance temperature control, the isothermal packed bed reactor with external cooling was also proposed. The catalyst is positioned in a vertical tubes or shell surrounded by saturated water [28]. The heat from exothermic reaction is eliminated using saturated water and steam generated.…”

Section: Fixed Bed/packed Bed Reactormentioning

confidence: 99%

Prospect of Direct Dimethyl Ether Production from CO2: Reactor Design Development

Nizam

Razak

Othman

et al. 2023

Mal. J. Fund. Appl. Sci.

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The increasing emissions of carbon dioxide (CO2) and volatile hydrocarbons via burning of fossil fuels result in a significant amount of global warming and air pollution. With the concern over the impact of fossil fuel to the environment, the interest in alternative fuel production from the CO2 generated through utilization of new technologies has risen rapidly. Several clean alternative fuels, including dimethyl ether (DME) have been investigated for a more sustainable and greener environment. DME has a high cetane number but produces much lower NOx emission upon combustion. DME is typically synthesized using syngas based on conventional indirect DME route, where the process begins with conversion of syngas into methanol and subsequently dehydrated to DME in separate units. Recently, a direct single-step route to produce DME through dehydrogenation of CO2 and dehydration of methanol by utilising a novel bifunctional catalyst has been investigated. In direct DME, the dehydrogenation and dehydration occur simultaneously in a single reactor, which eliminate the need for a methanol production plant. However, the use of conventional fixed-bed reactor (FBR) for the direct DME synthesis causes many challenges including catalyst deactivation, where water appears in the reaction area, limiting the conversion of CO2 reactants into DME and consequently, the DME yield. It is also essential to manage the exothermic heat generated from the catalyst for better DME yield. In order to overcome these hurdles, several types of reactors have been proposed such as fluidized bed reactor, slurry reactor, microreactor and catalytic membrane reactor. In this paper, different types of reactors are first discussed and its applications related to the direct DME production from CO2 are highlighted. Finally, the challenges and difficulties of reactor development are addressed and future direction is outlined.

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Validation of a Fixed Bed Reactor Model for Dimethyl Ether Synthesis Using Pilot-Scale Plant Data

Cited by 6 publications

References 39 publications

Gasoline Synthesis from Biomass-Derived Syngas Comparing Different Methanol and Dimethyl Ether Pathways by Process Simulation, Based on the Bioliq Process

Gasoline Synthesis from Biomass-Derived Syngas Comparing Different Methanol and Dimethyl Ether Pathways by Process Simulation, Based on the Bioliq Process

CO₂ to dimethyl ether (DME): structural and functional insights of hybrid catalysts

Prospect of Direct Dimethyl Ether Production from CO2: Reactor Design Development

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Validation of a Fixed Bed Reactor Model for Dimethyl Ether Synthesis Using Pilot-Scale Plant Data

Cited by 6 publications

References 39 publications

Gasoline Synthesis from Biomass-Derived Syngas Comparing Different Methanol and Dimethyl Ether Pathways by Process Simulation, Based on the Bioliq Process

Gasoline Synthesis from Biomass-Derived Syngas Comparing Different Methanol and Dimethyl Ether Pathways by Process Simulation, Based on the Bioliq Process

CO2 to dimethyl ether (DME): structural and functional insights of hybrid catalysts

Prospect of Direct Dimethyl Ether Production from CO2: Reactor Design Development

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Product

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About

CO₂ to dimethyl ether (DME): structural and functional insights of hybrid catalysts