Catalysis in microstructured reactors: Short review on small-scale syngas production and further conversion into methanol, DME and Fischer-Tropsch products

Venvik, Hilde J.; Yang, Jia

doi:10.1016/j.cattod.2017.02.014

Cited by 114 publications

(54 citation statements)

References 77 publications

(132 reference statements)

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“…The mass-transfer effect is more pronounced at high pressures, as shown in Figures 7 and 8. As the dimension of the methane-oxygen system increases, the outlet conversion drops sharply (Figure 8), because in this context the mass-transfer effect may be important [79,80] and the initiation of gas-phase combustion is possible.…”

Section: Further Discussionmentioning

confidence: 99%

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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This paper addresses the issues related to the favorable operating conditions for the small-scale production of synthesis gas from the catalytic partial oxidation of methane over rhodium. Numerical simulations were performed by means of computational fluid dynamics to explore the key factors influencing the yield of synthesis gas. The effect of mixture composition, pressure, preheating temperature, and reactor dimension was evaluated to identify conditions that favor a high yield of synthesis gas. The relative importance of heterogeneous and homogenous reaction pathways in determining the distribution of reaction products was investigated. The results indicated that there is competition between the partial and total oxidation reactions occurring in the system, which is responsible for the distribution of reaction products. The contribution of heterogeneous and homogeneous reaction pathways depends upon process conditions. The temperature and pressure play an important role in determining the fuel conversion and the synthesis gas yield. Undesired homogeneous reactions are favored in large reactors, and at high temperatures and pressures, whereas desired heterogeneous reactions are favored in small reactors, and at low temperatures and pressures. At atmospheric pressure, the selectivity to synthesis gas is higher than 98% at preheating temperatures above 900 K when oxygen is used as the oxidant. At pressures below 1.0 MPa, alteration of the dimension in the range of 0.3 and 1.5 mm does not result in significant difference in reactor performance, if made at constant inlet flow velocities. Air shows great promise as the oxidant, especially at industrially relevant pressure 3.0 MPa, thereby effectively inhibiting the initiation of undesired homogeneous reactions.

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Section: Further Discussionmentioning

confidence: 99%

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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“…Although the process would not be considered renewable, economies of scale using CH 4 from shale gas wells could also improve the economic feasibility of biological methane to methanol conversion technologies. Biological conversion technologies have good potential to improve the sustainability of natural gas conversion . In the short term, it is more attractive to develop methanotroph‐based biotechnologies for higher value products such as polyhydroxybutyrate, protein, or ectoine …”

Section: Resultsmentioning

confidence: 99%

Techno‐economic comparison of biogas cleaning for grid injection, compressed natural gas, and biogas‐to‐methanol conversion technologies

Sheets¹,

Shah²

2018

Biofuels Bioprod Bioref

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Technologies to upgrade biogas to value-added products have great potential to reduce greenhouse gas emissions and provide economic benefits. However, the costs of conventional upgrading methods, such as purification for natural gas grid injection or compressed natural gas (bio-CNG), have not been compared to the thermochemical or biological conversion of biogas to methanol. This study compared the techno-economic feasibility of upgrading biogas from a large-scale landfill or anaerobic digestion (AD) facility (5900 Nm 3 /h) to: 1) purified biogas (>97% CH 4 ) for grid injection; 2) bio-CNG; 3) methanol via thermochemical conversion; and 4) methanol via biological conversion using methanotrophs (methane-oxidizing bacteria). Bio-CNG had the highest net present value (NPV) ($43 million), followed by purified biogas ($80 000), biological methanol production (−$303 million), and thermochemical methanol production (−$358 million). Methanol costs were slightly lower for thermochemical conversion ($2.11/kg methanol, 1.99/kg after credits) compared to biological conversion ($2.24/kg methanol, $2.19/kg after credits) because the thermochemical technology had higher methanol production rates. Sensitivity analysis indicated that biological conversion costs can be lowered if methanotrophs are modified to have higher CH 4 oxidation rates and higher tolerance to methanol, and if formate costs are reduced.

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“…The FT process has been developed for decades; however, large-scale applications are scarce, especially when the syngas is based on biomass conversion. Large-scale, long-time investments of such plant developments are very risky due to the high capital costs, high operational and maintenance costs and even environmental concerns, so plant constructions have been often announced and then shut down or halted (Baliban et al, 2013;Maitlis, 2013;Venvik and Yang, 2017). There are different approaches for cheaper and more efficient plant installations, for example the so-called microstructured or microchannel reactors (also referred to as microreactors) showing enhanced heat and mass transfer in combination with highly active, selective and stable catalysts (Venvik and Yang, 2017).…”

Section: Economic Feasibility Of Fischer-tropsch Using Syngas From Bimentioning

confidence: 99%

Biomass gasification for bioenergy

Puig-Arnavat¹,

Thomsen²,

Sárossy³

et al. 2020

Burleigh Dodds Series in Agricultural Science

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Thermal gasification is a very relevant technological platform to assess in relation to production of carbonnegative bioenergy from plant materials as it offers high feed and product flexibility combined with highenergy efficiency. Many different biomass feedstock and organic secondary resources can be converted into a wide variety of products such as heat, electricity, chemicals, transport fuels and high-value ash and char products. The platform is undergoing fast development, and industry and academia work together to optimize the process performance, increase fuel and product flexibility as well as combine different technologies to increase the efficiency, economic viability and product yield and value. This chapter provides insight on the versatility and potential benefits of biomass gasification and the related biobased products. General key issues of gasification plant designs are discussed, and a series of new concepts and solutions within process integration schemes, polygeneration strategies and biochar uses are described.

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Catalysis in microstructured reactors: Short review on small-scale syngas production and further conversion into methanol, DME and Fischer-Tropsch products

Cited by 114 publications

References 77 publications

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Techno‐economic comparison of biogas cleaning for grid injection, compressed natural gas, and biogas‐to‐methanol conversion technologies

Biomass gasification for bioenergy

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