Conceptual Design Development of Coal-to-Methanol Process with Carbon Capture and Utilization

Khalafalla, Siddig S.; Zahid, Umer; Jameel, Abdul Gani Abdul; Ahmed, Usama; Alenazey, Feraih; Lee, Chul‐Jin

doi:10.3390/en13236421

Cited by 31 publications

(9 citation statements)

References 38 publications

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“…The emission data provides a valuable insight to design better combustors and estimate emissions. 33 The assignment of the IR absorbance bands for the discussed pollutant gases is presented in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

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Pyrolysis and Oxidation of Waste Tire Oil: Analysis of Evolved Gases

et al. 2022

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Valorization of waste such as waste tires offers a way to manage and reduce urban waste while deriving economic benefits. The rubber portion of waste tires has high potential to produce pyrolysis fuels that can be used for energy production or further upgraded for use as blend fuel with diesel. In the preset work, waste tire oil (WTO) was produced from the pyrolysis of waste tires in an electric heating furnace at 500–550 °C in the absence of oxygen. Pyrolysis (in nitrogen) and oxidation (in air) of the obtained WTO sample were then performed in a thermogravimetric (TG) furnace that was connected to a Fourier transform infrared cell where the evolved gases were analyzed. The WTO sample was heated up to 800 °C in the TG furnace where the temperature of the sample was ramped up at three heating rates, namely, 5, 10, and 20 °C/min. The TG mass loss and differential thermogravimetric mass loss plots were used to analyze the thermal degradation pathways. Kinetic analysis was performed using the distributed activation energy model to estimate the activation energies along the various stages of the reaction. The pollutant gases, namely, CO 2 , CO, NO, and H 2 O, formed during WTO oxidation were evaluated by means of the characteristic infrared absorbance. The functional groups evolved during pyrolysis, namely, alkanes, alkenes, aromatics, and carbonyl groups, were also analyzed. The obtained information can be used for the better design of gasifiers and combustors, to ensure the formation of high-value gaseous products while reducing the emissions. The utilization of waste tires by producing pyrolysis oils thus offers a way of tackling the menace of waste tires while acting as a potential energy source.

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Section: Resultsmentioning

confidence: 99%

“…The FTIR spectra are represented in the form of absorbance, which corresponds to the bonds and functional groups that exist in the evolved gases. The emission data provides a valuable insight to design better combustors and estimate emissions . The assignment of the IR absorbance bands for the discussed pollutant gases is presented in Table .…”

Section: Resultsmentioning

confidence: 99%

Pyrolysis and Oxidation of Waste Tire Oil: Analysis of Evolved Gases

et al. 2022

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“…When this is combined with CO 2 capture or reuse, the associated environmental impact further decreases. Khalafalla et al [8] presented various conceptual designs for coal-to-methanol pathways with CO 2 capture, revealing their improved performance in terms of energy requirements and methanol production costs of 21.9 GJ/tCH 3 OH and 142.5 USD/tCH 3 OH, respectively.…”

Section: Introductionmentioning

confidence: 99%

Process Analysis and Design Considerations of a Low Carbon Methanol Synthesis Plant from Lignite/Waste Gasification

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et al. 2022

Fuels

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This study presents design considerations and an evaluation of a full-scale process chain for methanol and advanced drop-in fuel production derived from lignite/solid recovered fuel (SRF) feedstock. The plant concept consists of a high-temperature Winkler (HTW) gasifier coupled with an air separation unit (ASU), which provides a high-purity (99.55%) gasification oxidant agent. The concept includes the commercially proven acid gas removal (AGR) system based on cold methanol (e.g., Rectisol® process) for the removal of BTX and naphthalene components. With the involvement of Rectisol®, an almost pure CO2 off-gas stream is generated that can be further stored or utilized (CCS/CCU), and a smaller CO2 stream containing H2S is recovered and subsequently driven to the sulfur recovery unit (e.g., Claus process). One of the potential uses of methanol is considered, and a methanol upgrading unit is implemented. The overall integrated process model was developed in the commercial software Aspen PlusTM. Simulations for different feedstock ratios were investigated, ensuring the concept’s adaptability in each case without major changes. A number of parametric studies were performed concerning (a) the oxygen purity and (b) the reformer type, and a comparison against alternative methanol production routes was conducted. Simulations show that the proposed system is able to retain the cold gas efficiency (CGE) in the range of 79–81.1% and the energetic fuel efficiency (EFE) at around 51%. An efficient conversion of approximately 99.5% of the carbon that enters the gasifiers is accomplished, with around 45% of carbon being captured in the form of pure CO2. Finally, the metrics of EFE and total C for the conversion of methanol to liquid fuels were 40.7% and 32%, respectively, revealing that the proposed pathway is an effective alternative for methanol valorization.

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“…Wang et al [13] and Huang et al [14] demonstrated the pathways for producing methanol and electricity in the poly-generation process integration framework and employed WGS reactors to achieve the desired HCR in the synthesis gas. Ahmed et al [15,16] developed the process models based on coal and natural gas feedstocks for generating hydrogen and methanol in a co-production manner. Recently, Rehfeldt et al [17] discussed the 2030 goal for global energy resources and mentioned the use of biomasses up to 10% with the primary energy resources.…”

Section: Introductionmentioning

confidence: 99%

Co-Production of Hydrogen and Methanol Using Fuel Mix Systems: Technical and Economic Assessment

et al. 2021

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With the increase in global energy requirements, the utilization of fossil fuels has also increased, which has caused global warming. In this study, a process integration framework based on an energy mix system is proposed to simultaneously produce two cleaner fuels (methanol and H2). Aspen Plus is used to develop process models followed by their techno-economic assessment. Case 1 is considered the base case process, where the coal–biomass gasification process is used to produce the synthesis gas, which is further converted into H2 and methanol. Conversely, the case 2 design represents the novel process configuration framework, where the coal–biomass gasification technology in case 1 is sequentially integrated with the methane reforming technology to minimize the energy penalties while increasing the net fuel production. To perform the technical analysis, the fuel production rates, carbon conversion efficiencies and specific energy requirements are compared for both models. It is analyzed from the results that the case 2 design offers higher methanol and H2 production rates with lower energy requirements. Additionally, the specific energy requirement for case 2 is 29% lower compared to the case 1 design, leading to an increase in the process efficiency of case 2 by 3.5%.

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Conceptual Design Development of Coal-to-Methanol Process with Carbon Capture and Utilization

Cited by 31 publications

References 38 publications

Pyrolysis and Oxidation of Waste Tire Oil: Analysis of Evolved Gases

Pyrolysis and Oxidation of Waste Tire Oil: Analysis of Evolved Gases

Process Analysis and Design Considerations of a Low Carbon Methanol Synthesis Plant from Lignite/Waste Gasification

Co-Production of Hydrogen and Methanol Using Fuel Mix Systems: Technical and Economic Assessment

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