Cited by 257Catalysts for Methane ReformingProcess Optimization and IntegrationCarbon dioxide utilization in catalysis

The DOI matches its Crossref record; 19 of the 22 references it cites were found in a registry or an index.

Process Advantages of Direct CO2 to Methanol Synthesis

Open access
Marlin, Dana S., Sarron, Emeric, Sigurbjörnsson, Ómar·2018·Frontiers in Chemistry

Abstract

Developing a laboratory scale or pilot scale chemical process into industrial scale is not trivial. The direct conversion of CO2 to methanol, and concomitant production of hydrogen from water electrolysis on large scale, are no exception. However, when successful, there are certain benefits to this process over the conventional process for producing methanol, both economic and environmental. In this article, we highlight some aspects that are unique to the process of converting pure CO2 to methanol. Starting from pure CO2 and a separate pure source of H2, rather than a mixture of CO, CO2 and H2 as is the case with syngas, simplifies the chemistry, and therefore also changes the reaction and purification processes from conventional methanol producing industrial plants. At the core of the advantages is that the reaction impurities are essentially limited to only water and dissolved CO2 in the crude methanol. In this paper we focus on several aspects of the process that direct conversion of CO2 to methanol enjoys over existing methods from conventional syngas. In particular, we discuss processes for removing CO2 from a methanol synthesis intermediate product stream by way of a stripper unit in an overhead stream of a distillation column, as well as aspects of a split tower design for the distillation column with an integrated vapo-condenser and optionally also featuring mechanical vapor re-compression. Lastly, we highlight some differences in reactor design for the present system over those used in conventional plants.

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Registry

Crossref · 10.3389/fchem.2018.00446

Cites

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Figures

Figure 1 (Top) CRI's George Olah Renewable Methanol plant in Svartsengi, Iceland. (Bottom) Block flow diagram showing the different origins of syngas for the conventional process compared to the CRI process starting from CO2 pointing out the energy intensive reforming process in the former.
Figure 1 (Top) CRI's George Olah Renewable Methanol plant in Svartsengi, Iceland. (Bottom) Block flow diagram showing the different origins of syngas for the conventional process compared to the CRI process starting from CO2 pointing out the energy intensive reforming process in the former.CC BY · PubMed Central
Figure 2 A simplified diagram of a separations system showing the reactor and the gas sparger unit. Process and component labels are included, and the streams are identified by numbering as follows (select conditions are provided where appropriate): (1) Feed approximately 50% methanol (molar); (2) Carrier gas (composition described in text); (3) Waste gas (mainly CO2 and carrier gas); (4) Methanol product; (5) Reflux stream; (6) Lean methanol (composition).
Figure 2 A simplified diagram of a separations system showing the reactor and the gas sparger unit. Process and component labels are included, and the streams are identified by numbering as follows (select conditions are provided where appropriate): (1) Feed approximately 50% methanol (molar); (2) Carrier gas (composition described in text); (3) Waste gas (mainly CO2 and carrier gas); (4) Methanol product; (5) Reflux stream; (6) Lean methanol (composition).CC BY · PubMed Central
Figure 3 A simplified diagram of the split column separations systems. Process and component labels are shown where they have not already been identified in Figure 2. The streams are identified by numbering as follows: (1) Feed comprising approximately 50% methanol (molar); (2) Carrier gas; (3) Waste gas (CO2 and carrier gas); (4) Methanol product; (5) Reflux stream; (6) MP stream enriched in water; (7 and 8) LP column reboiler stream; (9 and 10) MP column reflux stream; (11) Methanol product; (12) Bottoms (waste water); (13) MP column reboiler stream.
Figure 3 A simplified diagram of the split column separations systems. Process and component labels are shown where they have not already been identified in Figure 2. The streams are identified by numbering as follows: (1) Feed comprising approximately 50% methanol (molar); (2) Carrier gas; (3) Waste gas (CO2 and carrier gas); (4) Methanol product; (5) Reflux stream; (6) MP stream enriched in water; (7 and 8) LP column reboiler stream; (9 and 10) MP column reflux stream; (11) Methanol product; (12) Bottoms (waste water); (13) MP column reboiler stream.CC BY · PubMed Central
Figure 4 A simplified diagram showing the complete system featuring the reactor and the gas sparger unit, split column arrangement, and the mechanical vapor recompression unit. The labels and stream flows identified in Figures 2, 3 apply to this diagram and are omitted for clarity. The additional process labels relating to the mechanical vapor recompression unit are included here and the additional stream flow numbering labels are as follows: (14) Lean methanol; (15) Rich methanol reflux to LP; (16 and 17) Recycle stream.
Figure 4 A simplified diagram showing the complete system featuring the reactor and the gas sparger unit, split column arrangement, and the mechanical vapor recompression unit. The labels and stream flows identified in Figures 2, 3 apply to this diagram and are omitted for clarity. The additional process labels relating to the mechanical vapor recompression unit are included here and the additional stream flow numbering labels are as follows: (14) Lean methanol; (15) Rich methanol reflux to LP; (16 and 17) Recycle stream.CC BY · PubMed Central

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Citations

Cites

Show all 22 references

Research works printed but not linked: 3

  1. Alvarado, 2016, The changing face of the global methanol industry, IHS Chem. Bull., 3, 10
  2. Landälv, 2017, Methanol as a Renewable Fuel – a Knowledge Synthesis
  3. Lorenz, 2014, Methanol production from CO2, Section 4.8.2.3, 271

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Metadata

Authors
Marlin, D. S., Sarron, E., & Sigurbjörnsson, Ó.
Corresponding author
Marlin, Dana S.
Venue
Frontiers in Chemistry
Published
2018-09-27
Volume
6
Pages
446-446
ISSN
2296-2646 (ISSN-L)
OpenAlex
W2892805921
Cited by
257
References
22
Citations by year
2026: 17 · 2025: 36 · 2024: 50 · 2023: 36 · 2022: 43 · 2021: 41 · 2020: 27 · 2019: 7
FWCI
4.49
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
  • Physical Sciences › Engineering › Control and Systems Engineering › Process Optimization and Integration
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
Keywords
methanol synthesis, scale-up, methanol purification, distillation column, mechanical vapor recompression, reactor design

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