Systems and methods for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis

Abstract

The present disclosure provides system and method for gasification-based fuel synthesis by coupling it with green hydrogen produced using renewable energy, Carnot battery, and Solid- Oxide Electrolyser Cell (SOEC), with CO2 capture during gasification. The system provides an end-to-end solution for round-the-clock green hydrogen production using renewable energy sources coupled with a Carnot battery to run an SOEC. The SOEC produces oxygen and hydrogen from the continuous heat and power received from the Carnot battery. The oxygen is sent to a gasifier for gasification. The process of gasification includes a series of chemical reactions where the oxygen from SOEC and steam may be reacted with an organic feedstock to convert it to synthetic gas, which is further enriched with hydrogen produced by SOEC, to produce fuels. The CO2 captured from this process is further reacted with green hydrogen from SOEC to produce a parallel stream of electrofiiels. The heat generated during gasification-based fuel synthesis and electrofuels synthesis is recycled back to the Carnot battery.

Description

SYSTEMS AND METHODS FOR COUPLING GREEN HYDROGEN-BASED ELECTRO-FUEL SYNTHESIS WITH GASIFICATION-BASED FUEL SYNTHESISTECHNICAL FIELD

[0001] The present disclosure relates to the field of gasification-based fuel synthesis. More particularly, the present disclosure relates to a system and a method for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis.BACKGROUND

[0002] The following description of related art is intended to provide background information pertaining to the field of the disclosure. This section may include certain aspects of the art that may be related to various features of the present disclosure. However, it should be appreciated that this section be used only to enhance the understanding of the reader with respect to the present disclosure, and not as admissions of prior art.

[0003] Historically, gasification of fossil fuels such as coal has been an important pathway of synthesis of hydrocarbons. However, the environmental concerns associated with extraction and combustion of these fossil fuels, including greenhouse gas emissions and climate change have spurred significant interest in developing alternative and sustainable feedstocks and methods for hydrocarbon production. Biomass gasification is a promising sustainable approach for synthesis of hydrocarbon fuels. Gasification of biomass involves thermal decomposition in the presence of insufficient oxygen / air at high temperature in a reactor (which may have various configurations) to produce a mixture of H2, CO, CO2. CH4, and other compounds called syngas. The syngas is then conditioned to remove impurities and used for hydrocarbon synthesis.

[0004] However, a significant amount of carbon (>50%) is lost as CO2during gasification of biomass.

[0005] Further, to eliminate nitrogen from the syngas and ensure higher H2content, gasification may be done in an environment of steam and high-purity oxygen, both of which need to be generated.

[0006] Further, for optimal hydrocarbon synthesis, the R value of the syngas is usually more than 2:Biomass gasification itself gives a ratio <2. Water gas shift reaction may be used after the syngas conditioning step to increase the amount of H2:Water gas shift reaction •-However, the CO2produced in this step has to be removed using various methods resulting in a large loss of the carbon that entered the system as biomass.

[0007] The integration of green hydrogen with biomass gasification is a promising way to address the challenges associated with biomass gasification. Green hydrogen is produced by electrolysis of water using renewable energy. However, there are many challenges with the large-scale production of green hydrogen. Renewables such as solar and wind are intermittent, therefore, hydrogen production, when directly coupled with these renewables, is limited to a few hours per day. Round-the-clock renewables such as hydropower are limited by geography. Further, most commonly used electrolysers, alkaline and proton exchange membrane electrolysers, have modest efficiencies (e.g., 55 - 65 %). When coupled directly with intermittent renewables, these electrolysers can only function for a few hours per day and thus need to be oversized by two-three times. Furthermore, to utilize green hydrogen for production of hydrocarbons, a reactor / refinery is required, along with carbon dioxide. These reactors are usually designed to run at all times. So, when hydrogen production is coupled with intermittent renewables, either the reactors have to be oversized and designed to run intermittently, or hydrogen has to be stored for long hours which is very expensive and inconvenient. Therefore, the green hydrogen synthesis suffers from limitations imposed by intermittency of renewable energy availability and lack of widespread round-the-clock renewable energy, low efficiency of commonly used electrolysers, and high costs associated with storage.

[0008] There is, therefore, a need to overcome at least the above-mentioned drawbacks, limitations, and shortcomings, and provide an efficient solution for gasification of biomass.OBJECTS OF THE PRESENT DISCLOSURE

[0009] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.

[0010] An object of the present disclosure is to provide a system for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis.

[0011] Another object of the present disclosure is to provide a method for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis.

[0012] Another object of the present disclosure is to provide a system and a method for integration of gasification-based fuel synthesis with green hydrogen produced using renewable energy coupled with Carnot batteries and Solid-Oxide Electrolyser Cells (SOEC), along with capture of CO2 produced during biomass gasification for electro-fuel synthesis.

[0013] Still another object of the present disclosure is to combine renewable energy with Carnot batteries to provide round-the-clock power and heat to run the SOEC with high efficiency of more than 90% (up to 100%).

[0014] Yet another object of the present disclosure is to use SOEC in co-electrolysis mode by using steam and power from Carnot Battery and CO2 from gasification for electro-fuel synthesis.

[0015] Another object of the present disclosure is to use the green hydrogen from SOEC for optimizing the amount of H2during gasification-based fuel synthesis.

[0016] Still another object of the present disclosure is to use the oxygen from SOECs for gasification of biomass in the presence of steam and oxygen.

[0017] Yet another object of the present disclosure is to recycle and integrate the process heat from biofuel synthesis and electro-fuel synthesis to the Carnot battery to meet the heat / steam requirements of the system, and increase the total efficiency of the system.SUMMARY OF THE INVENTION

[0018] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in Detailed Description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0019] An aspect of the present disclosure is to provide a systems for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis comprising: an oxygen generator (106) or SOEC (206) configured for oxygen supply; a gasifier (104) configured to receive biomass (102) and oxygen from the oxygen generator (106) or SOEC (206) for producing a raw synthetic gas; one or more apparatus for conditioning of raw synthetic gas (108) by removing impurities to obtain a pure synthetic gas; a water gas shift (110) or hydrogen produced by SOEC (206) for boosting hydrogen and to obtain a final synthetic gas; a hydrocarbon synthesis reactor for synthesizing hydrocarbons from the final synthetic gas; and a means (112) to remove CO2 from the final synthetic gas, wherein the system synthesizes hydrocarbons from the final synthetic gas or syngas produced by gasification and separately synthesis of electrofuels from the hydrogen produced by SOEC(206) and CO2 extracted from syngas (112) via syngas or directly, thus coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis.

[0020] Another aspect of the present disclosure is to provide a method for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis comprising: a) supplying of biomass (102) and oxygen from SOEC (206) to a gasifier (104) for producing a raw synthetic gas; b) passing the raw synthetic gas through one or more apparatus (108) for removing the impurities and to obtain a pure synthetic gas; c) boosting hydrogen of the pure synthetic gas by a hydrogen from SOEC (206) and removal of CO2 (112) to obtain a final synthetic gas; d) feeding the final synthetic gas or syngas to a hydrocarbon synthesis reactor; e) reaction of CO2 from syngas and H2 from SOEC (206) to produce electrofiiels via syngas or through direct reaction; and f) recycling of heat from both streams (gasification-based fuel synthesis and electrofuels synthesis) to the Carnot Battery to supply various processes such as gasification, CO2 extraction, SOEC and increase the energy efficiency of the process.

[0021] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated herein, and constitute a part of this invention, illustrate exemplary embodiments of the disclosed methods and systems in which like reference numerals refer to the same parts throughout the different drawings. Components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. Some drawings may indicate the components using block diagrams and may not represent the internal circuitry of each component. It will be appreciated by those skilled in the art that invention of such drawings includes the invention of electrical components, electronic components or circuitry commonly used to implement such components.

[0023] FIG. 1 illustrates an example representation of a baseline system for gasificationbased fuel synthesis.

[0024] FIG. 2 illustrates an example representation of a system for gasification-based fuel synthesis integrated with green hydrogen produced by coupling renewable energy and Carnot batteries with Solid-Oxide Electrolyser Cells (SOEC), in accordance with embodiments of the present disclosure.DETAILED DESCRIPTION

[0025] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[0026] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.

[0027] If the specification states a component or feature “may,” “can,” “could,” or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.

[0028] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.

[0029] The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. The terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items. Further, the use of terms “first,” “second,” and “third,” and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

[0030] Moreover, in interpreting the specification, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a nonexclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C . . . .and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.

[0031] The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate theinvention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[0032] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and / or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

[0033] Embodiments of the present disclosure relate to a system and a method for gasification-based fuel synthesis.

[0034] An embodiment of the present disclosure is to provide systems for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis comprising: an oxygen generator (106) or SOEC (206) configured for oxygen supply; a gasifier (104) configured to receive biomass (102) and oxygen from the oxygen generator (106) or SOEC (206) for producing a raw synthetic gas; one or more apparatus for conditioning of raw synthetic gas (108) by removing impurities to obtain a pure synthetic gas; a water gas shift (110) or hydrogen produced by SOEC (206) for boosting hydrogen and to obtain a final synthetic gas; a hydrocarbon synthesis reactor for synthesizing hydrocarbons from the final synthetic gas; and a means (112) to remove CO2 from the final synthetic gas, wherein the system synthesizes hydrocarbons from the final synthetic gas or syngas produced by gasification and separately synthesis of electrofuels from the hydrogen produced by SOEC (206) and CO2 extracted from syngas (112) via syngas or directly, thus coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis.

[0035] In an embodiment, the SOEC (206) is coupled with Carnot battery (204) which receives renewable power supply from one or more intermittent renewable sources (202).

[0036] In an embodiment, the Carnot battery (204) produces and provides continuous heat and power output to the SOEC (206) for producing oxygen and hydrogen continuously at a high efficiency of more than 90%.

[0037] In an embodiment, the Carnot battery (204) stores electricity in the form of thermal energy using processes such as but not limited to thermal energy storage, pumped thermal energy storage, and liquid air energy storage and combination thereof during the charging cycle.

[0038] In an embodiment, the stored thermal energy is converted back to power using a heat engine (with a round-trip efficiency of 60-70%) during the discharge cycle and the usable heat is also available during the discharge cycle, providing both dispatchable power and heat for a long duration, with the total efficiency of the Carnot battery (combined power and heat) more than 90% (up to 100%).

[0039] In an embodiment, the hydrocarbon synthesis from syngas is happened via methanol- to-gasoline pathway (114), Fischer-Tropsch (FT) reactor (116) or another type of reactor.

[0040] In an embodiment, the heat generated during the hydrocarbon synthesis is recycled back to the system for producing stream to be used by the gasifier (104) and water gas shift (HO).

[0041] In an embodiment, the hydrogen is supplied from the SOEC (206) for boosting hydrogen of the pure synthetic gas or syngas.

[0042] In an embodiment, the H2 from SOEC (206) and CO2 (112) removed from syngas are reacted to produce electrofuels via syngas or through direct reaction to produce electrofuels.

[0043] Another embodiment of the present disclosure is to provide a method for coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis comprising: a) supplying of biomass (102) and oxygen from SOEC (206) to a gasifier (104) for producing a raw synthetic gas; b) passing the raw synthetic gas through one or more apparatus (108) for removing the impurities and to obtain a pure synthetic gas; c) boosting hydrogen of the pure synthetic gas by a hydrogen from SOEC (206) and removal of CO2 (112) to obtain a final synthetic gas; d) feeding the final synthetic gas or syngas to a hydrocarbon synthesis reactor; e) reaction of CO2 from syngas and H2 from SOEC (206) to produce electrofuels via syngas or through direct reaction; and f) recycling of heat from both streams (gasification-based fuel synthesis and electrofuels synthesis) to the Carnot Battery to supply various processes such as gasification, CO2 extraction, SOEC and increase the energy efficiency of the process.

[0044] In an embodiment, the synthetic gas comprises a mixture of hydrogen (H2), carbon monoxide (CO), and carbon dioxide (CO2).

[0045] In an embodiment, the carbon dioxide is removed from the syngas (112).

[0046] In an embodiment, the method further comprises formation of syngas or direct e-fiiels from hydrogen and carbon dioxide.

[0047] FIG. 1 illustrates an example representation of a baseline system 100 for gasificationbased fuel synthesis.

[0048] Referring to FIG. 1, the system 100 may include a gasifier 104 that may receive biomass 102 and oxygen from an oxygen generator 106. The gasifier 104 may perform gasification of biomass 102 using steam and oxygen from the oxygen generator 106 to produce synthetic gas. The synthetic gas may include a mixture of hydrogen (H2), carbon monoxide (CO), and carbon dioxide (CO2).

[0049] The synthetic gas produced by the gasifier 104 may be conditioned 108 to remove impurities like tars and Sulphur compounds. The synthetic gas produced by the gasifier 104 may have a low concentration of H2which is boosted using water gas shift 110. In some embodiments, CO2112 is removed after the water gas shift 110. The carbon conversion efficiency by implementing the system 100 is < 50%.

[0050] The final synthetic gas is sent for hydrocarbon synthesis, such as to methanol reactor 114 or Fischer-Tropsch (FT) reactor 116 or another type of reactor. The synthetic gas thus produced may be converted to fuels, for example, methanol using the methanol reactor 114 or the FT reactor 116.

[0051] The methanol reactor 114 may implement a Methanol-To-Gasoline (MTG) process to convert the methanol to higher carbon chain hydrocarbons. A person of ordinary skill in the art will understand that methanol synthesis process may refer to methanol production from the synthetic gas. Further, a person of ordinary skill in the art will understand that the MTG process may refer to a sustainable process for producing gasoline-range hydrocarbon biofuels. It may be appreciated that steam produced by the methanol reactor 114 may be used by the gasifier 104 and for water gas shift 110.

[0052] The FT reactor 116 may implement FT synthesis process. A person of ordinary skill in the art will understand that the FT synthesis process may refer to a collection of chemical reactions that convert the syngas into liquid hydrocarbons.

[0053] FIG. 2 illustrates an example representation of a system 200 for gasification-based biofuel synthesis by coupling green hydrogen produced using renewable energy and Carnot batteries with Solid-Oxide Electrolyser Cells (SOEC), in accordance with embodiments of the present disclosure.

[0054] Referring to FIG. 2, the proposed system 200 may include a gasifier 104 that may receive biomass 102 and oxygen from an SOEC 206. A Carnot battery 204 may receive renewable power supply from one or more intermittent renewable sources 202. In some embodiments, the Carnot battery 204 may store electricity in the form of thermal energy using various processes such as but not limited to, thermal energy storage, pumped thermal energy storage, and liquid air energy storage to produce hydrogen during the charge cycle.The stored thermal energy is converted back to power using a heat engine (e.g., Brayton cycle, Rankine cycle, etc.) during the discharge cycle. Residual thermal energy or heat is also available from this process, thus providing both dispatchable power and heat for a long duration. In some embodiments, the Carnot battery 204 may store electrical energy in the form of heat energy during the charging cycle. During discharge, the heat may be converted back to electricity, for example, at an efficiency of 60-70%. In some embodiments, the remaining heat may be used for other purposes within the scope of the present disclosure. In some embodiments, the total efficiency of the Carnot battery 204 may be >90% (up to 100%).

[0055] The Carnot battery 204 may produce and provide continuous heat and power output to the SOEC 206. The SOEC 206 may produce oxygen and hydrogen from the continuous heat and power received from the Carnot battery 204. The oxygen produced may be sent to the gasifier 104 for gasification, which may completely suffice for the gasification process (with excess to be used as a by-product). The process of gasification may include a series of chemical reactions where the received oxygen produced by the SOEC 206 and steam may be reacted with an organic feed material to convert the feed material to syngas. In some embodiments, the feed material may be dry biomass, but not limited to the like.

[0056] The gasifier 104 may perform gasification of biomass 102 using steam and oxygen from the SOEC 206 to produce synthetic gas. The synthetic gas produced by the gasifier 104 may be conditioned 108 to remove impurities like tars and Sulphur compounds. The synthetic gas produced by the gasifier 104 may have a low concentration of H2which is boosted by the hydrogen produced by the SOEC 206. In some embodiments, heat from the Carnot battery 204 may be used for separating CO2from the synthetic gas. The removed CO2may be reacted with the hydrogen produced by the SOEC 206 to produce a second stream of fuels (e.g., synthetic gas or direct e-fiiels). It may be appreciated that due to the removal and utilization of CO2112, the carbon conversion efficiency is around 90%, which is much higherthan the carbon conversion efficiency with respect to FIG. 1.

[0057] The final synthetic gas is sent to the MTG reactor 114 or the FT reactor 116 for production of hydrocarbon fuels. It may be appreciated that heat generated during fuel synthesis from both the streams (gasification and electrofiiels synthesis) may be recycled back to the Carnot battery to be used for the gasifier, CO2 separation and other processes.

[0058] In case of methanol as the end product of both processes (gasification and electrofiiels synthesis), the total methanol output is more than twice the baseline scenario (refer FIG. 1) with the same amount of biomass.

[0059] Therefore, the present disclosure describes an end-to-end solution wherein the carbon dioxide is captured and utilized during gasification of biomass thereby doubling the carbon utilization efficiency. Biomass gasification is used to produce synthetic gas that can be used for generation of biofuels (or power or other end uses). During gasification, carbon dioxide is usually removed from synthetic gas before biofuel synthesis to achieve a precise concentration of H2. The present disclosure couples green hydrogen produced using Carnot battery and SOEC with CO2capture during biomass gasification that leads to unique synergies and emergent properties.

[0060] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.ADVANTAGES OF THE PRESENT DISCLOSURE

[0061] The present disclosure utilizes Carnot batteries to eliminate the issue of intermittency of renewables.

[0062] The present disclosure utilizes Carnot batteries that provide both power and heat to run a Solid-Oxide Electrolyser Cell (SOEC) with high efficiency.

[0063] The present disclosure provides recycling and storing of the process heat released during the downstream processes back to Carnot batteries to increase the total efficiency of the process.

[0064] The present disclosure provides SOECs with very high efficiency that can utilize heat and power from Carnot batteries to operate round-the-clock without the need to oversize the electrolysers.

[0065] The present disclosure allows the whole system to be situated anywhere and function as a complete unit for gasification-based fuel synthesis without the need for any outside ingredient.

[0066] The present disclosure captures the CO2produced during gasification and utilizes it, along with green hydrogen, for synthesis of a parallel stream of electrofiiels thereby doubling the carbon utilization efficiency and potentially the fuel output.

[0067] The present disclosure utilizes the oxygen produced by SOECs for gasification thereby eliminating the need of an oxygen generator.

Claims

I Claim:

1. A systems for coupling green hydrogen-based electro-fuel synthesis with gasificationbased fuel synthesis comprising: an oxygen generator (106) or SOEC (206) configured for oxygen supply; a gasifier (104) configured to receive biomass (102) and oxygen from the oxygen generator (106) or SOEC (206) for producing a raw synthetic gas; one or more apparatus for conditioning of raw synthetic gas (108) by removing impurities to obtain a pure synthetic gas; a water gas shift (110) or hydrogen produced by SOEC (206) for boosting hydrogen and to obtain a final synthetic gas; a hydrocarbon synthesis reactor for synthesizing hydrocarbons from the final synthetic gas; and a means (112) to remove CO2 from the final synthetic gas, wherein the system synthesizes hydrocarbons from the final synthetic gas or syngas produced by gasification and separately synthesis of electrofiiels from the hydrogen produced by SOEC (206) and CO2 extracted from syngas (112) via syngas or directly, thus coupling green hydrogen-based electro-fuel synthesis with gasification-based fuel synthesis.

2. The system as claimed in claim 1, wherein the SOEC (206) is coupled with Carnot battery (204) which receives renewable power supply from one or more intermittent renewable sources (202).

3. The system as claimed in claim 2, wherein the Carnot battery (204) produces and provides continuous heat and power output to the SOEC (206) for producing oxygen and hydrogen continuously at a high efficiency of more than 90%.

4. The system as claimed in claim 3, wherein the Carnot battery (204) stores electricity in the form of thermal energy using processes such as but not limited to thermal energy storage, pumped thermal energy storage, and liquid air energy storage and combination thereof during the charging cycle.

5. The system as claimed in claim 4, wherein the stored thermal energy is converted back to power using a heat engine (with a round-trip efficiency of 60-70%) during the discharge cycle and the usable heat is also available during the discharge cycle, providing bothdispatchable power and heat for a long duration, with the total efficiency of the Carnot battery (combined power and heat) more than 90% (up to 100%).

6. The system as claimed in claim 1, wherein the hydrocarbon synthesis from syngas is happened via methanol-to-gasoline pathway (114), Fischer-Tropsch (FT) reactor (116) or another type of reactor.

7. The system as claimed in claim 1, wherein the heat generated during the hydrocarbon synthesis is recycled back to the system for producing stream to be used by the gasifier (104) and water gas shift (110).

8. The system as claimed in claim 1, wherein the hydrogen is supplied from the SOEC (206) for boosting hydrogen of the pure synthetic gas or syngas.

9. The system as claimed in claim 1, wherein the H2 from SOEC (206) and CO2 (112) removed from syngas are reacted to produce electrofuels via syngas or through direct reaction to produce electrofuels.

10. A method for coupling green hydrogen-based electro-fuel synthesis with gasificationbased fuel synthesis comprising: a) supplying of biomass (102) and oxygen from SOEC (206) to a gasifier (104) for producing a raw synthetic gas; b) passing the raw synthetic gas through one or more apparatus (108) for removing the impurities and to obtain a pure synthetic gas; c) boosting hydrogen of the pure synthetic gas by a hydrogen from SOEC (206) and removal of CO2 (112) to obtain a final synthetic gas; d) feeding the final synthetic gas or syngas to a hydrocarbon synthesis reactor; e) reaction of CO2 from syngas and H2 from SOEC (206) to produce electrofuels via syngas or through direct reaction; and f) recycling of heat from both streams (gasification-based fuel synthesis and electrofiiels synthesis) to the Carnot Battery to supply various processes such as gasification, CO2 extraction, SOEC and increase the energy efficiency of the process.

11. The method as claimed in claim 10, wherein the synthetic gas comprises a mixture of hydrogen (H2), carbon monoxide (CO), and carbon dioxide (CO2).

12. The method as claimed in claim 10, wherein the carbon dioxide is removed from the syngas (112).

13. The method as claimed in claim 10, wherein the method further comprises formation of syngas or direct e-fuels from hydrogen and carbon dioxide.

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