KR102466129B1 - Methods and systems for production of synthetic gas - Google Patents

Abstract

A syngas production method and system are disclosed. According to an embodiment of the present invention, a syngas production method includes the steps of melting BHET (Bis(2-hydroxyethyl) Terephthalate) to a reaction chamber to produce liquid BHET in a liquid state; and generating syngas by reacting plasma generated when power is supplied to the reaction chamber with the liquid BHET.

Description

Synthesis gas production method and system {METHODS AND SYSTEMS FOR PRODUCTION OF SYNTHETIC GAS}

The present invention, in accordance with the need for decomposition and resource recycling of PET (polyethyleneterephthalate), a representative environmental pollutant, is a synthesis gas for generating synthesis gas capable of decomposing and recycling Bis(2-hydroxyethyl) Terephthalate (BHET), an intermediate stage material for PET decomposition. It relates to production methods and systems.

In particular, the present invention provides a technology for producing synthesis gas by heating BHET to melt it into a liquid state and reacting the liquid BHET with plasma.

Waste plastics require a lot of time to decompose naturally when discarded, and in this process cause enormous pollution to the surrounding environment.

Accordingly, there is an urgent need to develop a more improved technology that stably decomposes waste plastics and recycles them into syngas.

Prior Art 1: Method for producing syngas from bis(2-hydroxyethyl) terephthalate using a plasma process (Application No. 10-2019-0149933)

Prior Art 2: Pyrolysis and emulsification method of plastic waste and its device (Application No. 10-2019-0014719)

An embodiment of the present invention is a syngas that decomposes bis(2-hydroxyethyl) terephthalate (BHET) generated during the depolymerization of PET into plasma and generates syngas such as CO and H ₂ in the process. It is a challenge to provide a production method and apparatus.

In addition, an embodiment of the present invention aims to solve the plastic waste disposal problem and utilize it in the field of generating syngas.

In addition, an embodiment of the present invention, by using BHET in a liquid state, can produce a larger amount of CO and H ₂ as compared to conventional technologies using BHET in a solid state.

In addition, an embodiment of the present invention aims to efficiently decompose plastic waste and generate syngas by connecting in series or concurrently with a conventional plastic (PET) depolymerization process.

In addition, an object of the present invention is to provide a method and apparatus for producing syngas, which replaces the conventional plastic pyrolysis process.

According to an embodiment of the present invention, a syngas production method includes the steps of melting BHET (Bis(2-hydroxyethyl) Terephthalate) to a reaction chamber to produce liquid BHET in a liquid state; and generating syngas by reacting plasma generated when power is supplied to the reaction chamber with the liquid BHET.

In addition, the syngas production system according to an embodiment of the present invention, in conjunction with the supply of BHET (Bis (2-hydroxyethyl) Terephthalate) to the reaction chamber, a heating unit that melts the BHET to produce liquid BHET in a liquid state; and a reaction unit for producing syngas by reacting plasma generated as power is supplied to the reaction chamber with the liquid BHET.

According to one embodiment of the present invention, bis(2-hydroxyethyl) terephthalate (BHET) generated during the depolymerization of PET is decomposed into plasma, and syngas such as CO and H ₂ is generated in the process, A synthesis gas production method and apparatus can be provided.

In addition, according to the present invention, it is possible to solve the problem of plastic waste treatment and utilize it in the field of generating syngas.

In addition, according to the present invention, by using BHET in a liquid state, it is possible to produce a larger amount of CO and H ₂ as compared to conventional technologies using BHET in a solid state.

In addition, according to the present invention, it is possible to efficiently decompose plastic waste and generate syngas by connecting in series or concurrently with the conventional plastic (PET) depolymerization process.

In addition, according to the present invention, it is possible to provide a synthesis gas production method and apparatus that replaces the conventional plastic pyrolysis process.

1 is a block diagram showing the configuration of a syngas production system according to an embodiment of the present invention.
Figure 2 is a diagram illustrating the H / W configuration of the BHET-plasma reaction system according to the present invention.
3 is a diagram illustrating the operating flow of the BHET-plasma reaction system according to the present invention.
4 is a diagram for explaining the measurement of generated gas according to the BHET solid/liquid state and plasma On/Off.
5 is a diagram illustrating an actual example of a plasma electrode.
6 is a diagram showing an actual example of a heating system.
7 is a view for explaining a plasma generation position change experiment.
8 is a flowchart illustrating a syngas production method according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Terms used in the examples are used only for descriptive purposes and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

1 is a block diagram showing the configuration of a syngas production system according to an embodiment of the present invention.

Referring to FIG. 1 , a syngas production system 100 according to an embodiment of the present invention may include a heating unit 110 and a reaction unit 120 . In addition, the syngas production system 100 may be configured to selectively include a controller 130 and an analyzer 140 according to embodiments.

First, the heating unit 110 interlocks with the supply of BHET (Bis(2-hydroxyethyl) Terephthalate) to the reaction chamber to melt the BHET to produce liquid BHET in a liquid state. That is, the heating unit 110 may serve to make liquid BHET in a liquid state by applying heat to and melting the BHET in a solid state supplied to the reaction chamber.

Here, BHET may be a monomeric intermediate material of PET produced by a depolymerization process by mixing waste polyester with ethylene glycol.

In making liquid BHET, the heating unit 110 may employ a heating system capable of heating BHET above its melting point.

That is, the heating unit 110 can uniformly heat the BHET by transferring heat output from the heater to the BHET through a medium.

Here, the melting point of BHET may be 106 degrees to 109 degrees.

The heating system may include a heater that dissipates heat and a medium such as oil that transfers heat from the heater to the BHET. The medium can heat BHET containers made of glass.

The heating sequence by the heating system may be in the order of heater-medium (oil)-reactor (BHET).

In addition, the reaction unit 120 reacts plasma generated as power is supplied to the reaction chamber with the liquid BHET to produce syngas. That is, the reaction unit 120 may serve to obtain recyclable synthesis gas by electrically reacting the melted liquid BHET with plasma.

Plasma refers to a state in which negatively charged electrons and positively charged ions are mixed in a neutral gas, and is quasi-neutral because the number of negative and positive charges is almost equal as a whole.

The syngas produced in the reaction unit 120 may include CO, H ₂ , and the like as components.

In particular, the reaction unit 120 produces syngas using BHET in liquid state compared to syngas produced from conventional BHET in solid state, so the amount of constituents of syngas produced can be greatly increased. .

In one embodiment, the plastic decomposition and syngas production system 100 can produce syngas by flexibly adjusting the components of the syngas.

To this end, the plastic decomposition and syngas production system 100 may further include a controller 130.

That is, the control unit 130 may change the composition of the syngas by adjusting the position of the electrode generating the plasma in consideration of the target process.

In the present invention, the position of the electrode to be adjusted may be inside the liquid BHET or outside (surface) of the liquid BHET. The electrode can be exemplified by a wire-wire electrode capable of generating plasma even inside liquid BHET or a surface discharge electrode capable of generating a large amount of plasma.

If the target process is a 'NOx reduction process', the control unit 130 may adjust the location of the electrode to the inside of the liquid BHET so that synthesis gas with reduced NOx content and less impurities can be produced. That is, the control unit 130 adjusts the position of the electrode into the liquid BHET to convert CO and H ₂ into main components (NOx is almost 0) through a reaction between plasma generated in the liquid BHET and the liquid BHET. It is possible to produce syngas with less impurities.

If the target process is a 'synthesis gas generation efficiency process', the control unit 130 adjusts the position of the electrode to the surface of the liquid BHET, thereby reducing CO and H ₂ , which are constituents of the syngas produced. Each content can be made close to the numerical value prescribed|regulated in advance. That is, the control unit 130 adjusts the location of the electrode to the outside of the liquid BHET, so that syngas containing CO and H ₂ can be produced through a reaction between plasma generated outside the liquid BHET and the liquid BHET.

In one embodiment, the plastic decomposition and syngas production system 100 may automatically supply fresh BHET to the reaction chamber.

To this end, the controller 130 may measure the height of the liquid BHET in the reaction chamber, and determine the supply of new BHET to the reaction chamber based on the measured height. That is, the control unit 130 measures the amount of BHET consumed according to the production of syngas by measuring the height of the liquid BHET remaining in the reaction chamber, and if the measured height is less than a predetermined reference value, the reaction chamber New BHET can be supplied automatically.

In another embodiment, the plastic decomposition and syngas production system 100 may control process conditions for producing syngas.

To this end, the plastic decomposition and syngas production system 100 may further include an analysis unit 140.

That is, the analyzer 140 may perform feedback and automatic control of process conditions by analyzing the syngas. That is, the analyzer 140 may support feedback and automatic control for adjusting/changing process conditions for producing syngas in the future through analysis of the syngas.

Here, the process conditions refer to process specifications for producing syngas, and examples thereof include designation of a plasma generation location and adjustment of BHET supply timing.

According to one embodiment of the present invention, bis(2-hydroxyethyl) terephthalate (BHET) generated during the depolymerization of PET is decomposed into plasma, and syngas such as CO and H ₂ is generated in the process, A synthesis gas production method and apparatus can be provided.

In addition, according to the present invention, it is possible to solve the problem of plastic waste treatment and utilize it in the field of generating syngas.

In addition, according to the present invention, by using BHET in a liquid state, it is possible to produce a larger amount of CO and H ₂ as compared to conventional technologies using BHET in a solid state.

In addition, according to the present invention, it is possible to efficiently decompose plastic waste and generate syngas by connecting in series or concurrently with the conventional plastic (PET) depolymerization process.

In addition, according to the present invention, it is possible to provide a synthesis gas production method and apparatus that replaces the conventional plastic pyrolysis process.

The plastic decomposition and syngas production system 100 of the present invention can efficiently generate syngas H ₂ and CO through a plasma reaction with BHET in a liquid state.

In addition, the plastic decomposition and synthesis gas production system 100 may use an electrode capable of generating plasma even inside the BHET in a liquid state.

In addition, the plastic decomposition and synthesis gas production system 100 may include a heating system for producing BHET in a liquid state.

In addition, the plastic decomposition and syngas production system 100 may have process characteristics in which the amount of syngas generated is different depending on where the plasma is generated, that is, whether inside the BHET or outside the BHET.

In addition, the plastic decomposition and synthesis gas production system 100 may enable feedback and automatic control of process conditions (plasma generation location, BHET supply, etc.) by monitoring the synthesis gas production result.

In addition, the plastic decomposition and syngas production system 100 may heat BHET into a liquid state and then react with plasma to decompose BHET and generate syngas.

In addition, the plastic decomposition and synthesis gas production system 100 may feed back the result of generated gas measured by the analyzer through the control unit to adjust the position of the electrode and the supply amount of BHET.

In addition, the plastic decomposition and syngas production system 100 can decompose BHET and generate syngas under atmospheric pressure/low temperature conditions, thereby supporting the design of a PET decomposition and recycling process that can replace the existing plastic pyrolysis process. .

In prior art 1, the possibility of generating syngas by reacting BHET with plasma was demonstrated, but it was necessary to increase the amount of syngas generated.

The plastic decomposition and synthesis gas production system 100 of the present invention effectively generates synthesis gas by reacting BHET in a liquid state with plasma. To this end, the plastic decomposition and synthesis gas production system 100 includes a heating system for melting BHET in a solid state, and uses an electrode capable of generating plasma even inside a liquid.

In addition, the plastic decomposition and synthesis gas production system 100 constitutes a system including an analysis unit, and through the analysis unit, when BHET in liquid state is decomposed, the disassembly is greater than the distribution when BHET in solid state is decomposed. It can be confirmed that more syngas is produced.

In addition, the plastic decomposition and synthesis gas production system 100 checks process variables capable of determining the production amount of synthesis gas and nitrogen oxides (NOx) when the location of the plasma electrode is inside or on the surface of the BHET. In order to adjust these process variables, the plastic decomposition and synthesis gas production system 100 includes a control unit capable of adjusting the location of plasma generation and the supply of BHET, and controls the type and amount of generated gas.

Accordingly, the plastic decomposition and syngas production system 100 of the present invention is capable of generating a greater amount of syngas with higher efficiency than the prior art 1.

The differences between the prior art 1 and the present invention are summarized in [Table 1].

[Table 1]

As shown in [Table 1], the plastic decomposition and synthesis gas production system 100, unlike the prior art 1, can efficiently generate synthesis gas H ₂ and CO through a plasma reaction with BHET in a liquid state.

In addition, unlike the prior art 1, the plastic decomposition and synthesis gas production system 100 may use an electrode capable of generating plasma even inside the BHET in a liquid state.

In addition, the plastic decomposition and syngas production system 100 may include a heating system for producing BHET in a liquid state (BHET melting point may be 106 °C or higher, and may be 200 °C or higher according to embodiments). ).

In addition, the plastic decomposition and synthesis gas production system 100 has a process feature in which the plasma generation location (inside or outside the BHET) determines the amount of generated gas.

In addition, the plastic decomposition and synthesis gas production system 100 may include a control unit capable of adjusting the plasma generation location and the BHET supply amount based on the analysis result.

In the prior art 2, it is possible to generate carbon compounds by decomposing plastics, but the process is performed under high temperature conditions of at least 1,500 ° C. and requires a separate device for incinerating harmful gases.

In contrast, the plastic decomposition and synthesis gas production system 100 of the present invention is relatively efficient in terms of facilities and costs for creating process conditions because the process is performed at 200 ° C. In addition, since the process of the present invention does not generate harmful substances such as dioxins generated during thermal decomposition, a separate device for incinerating harmful gases is not required.

Figure 2 is a diagram illustrating the H / W configuration of the BHET-plasma reaction system according to the present invention.

Figure 2 shows a schematic diagram of the BHET-plasma reaction system.

The BHET-plasma reaction system may consist of a heating part, a reaction part, an analysis part, and a control part.

The heating unit 210 may melt BHET by heating it to 106 °C or higher. The heating unit 210 may be composed of a heater and oil. The heating unit 210 may evenly transfer heat emitted from the heater to the entire surface of the BHET through oil.

The reaction unit 220 may cause BHET and plasma to interact. The reaction unit 220 reacts BHET with plasma to generate synthesis gas containing H ₂ , CO, and the like as components. The position of the electrode generating the plasma can be adjusted inside or outside the BHET, depending on the target process.

The analyzer 230 may analyze the generated gas. The analyzer 230 may analyze the syngas flowing into the chiller and feed back analysis result data to the controller 240 .

The controller 240 may control the BHET surface height measurement, electrode position, and BHET supply. That is, the control unit 240 may change or adjust process conditions using the feedbacked analysis result data.

3 is a diagram illustrating the operating flow of the BHET-plasma reaction system according to the present invention.

3 shows the operational flow of an embodiment of the BHET-plasma reaction system.

In ①, the BHET-plasma reaction system can supply BHET to the reaction chamber.

In ②, the BHET-plasma reaction system can melt BHET by heating it above 106 °C.

In ③, the BHET-plasma reaction system can cause a BHET-plasma reaction.

In ④, the BHET-plasma reaction system can analyze the gas concentration.

In ④, the BHET-plasma reaction system can establish an automatic process control strategy through analysis of generated gas.

In ⑤, the BHET-plasma reaction system can control electrode position and BHET supply.

In ⑤, the BHET-plasma reaction system, for example, when NOx reduction is required, the BHET-plasma reaction system may perform the NOx reduction process by adjusting the position of the electrode to the inside of the BHET.

If it is necessary to increase the amount of syngas produced, the BHET-plasma reaction system can perform a syngas production efficiency process by adjusting the position of the electrode to the BHET surface. At this time, the BHET-plasma reaction system may require separate NOx removal.

In addition, the BHET-plasma reaction system can control the process through BHET solution height measurement.

The BHET-plasma reaction system can control the positioning of the electrodes in the BHET solution if it is necessary to control the generated gas. In addition, the BHET-plasma reaction system can automatically control the supply of BHET when the lack of BHET in the reaction chamber is confirmed.

In ⑥, the BHET-plasma reaction system can control the BHET-plasma reaction.

4 is a diagram for explaining the measurement of generated gas according to the BHET solid/liquid state and plasma On/Off.

The plastic decomposition and synthesis gas production system 100 can efficiently generate synthesis gas H ₂ and CO through a plasma reaction with BHET in a liquid state.

As shown in FIG. 4, in the BHET-plasma reaction, the production of syngas (H ₂ , CO) can be confirmed.

In normal atmospheric conditions (no BHET condition, plasma off), CO 1 ppm, H ₂ 3 ppm, and NOx 1 ppm are measured.

In the solid BHET-plasma reaction (solid in BHET state, Plasma On), 2 ppm CO, 21 ppm H ₂ and 146 ppm NOx are measured.

In the liquid BHET-plasma reaction (liquid in BHET state, Plasma On), CO 8890 ppm, H ₂ 2502 ppm, and NOx 171 ppm were measured, resulting in a 0.2 g reduction in BHET.

That is, the liquid BHET-plasma reaction can greatly increase the amount of syngas generated compared to the solid BHET-plasma reaction.

5 is a diagram showing an actual example of a plasma electrode.

Unlike the prior art, the plastic decomposition and synthesis gas production system 100 uses an electrode capable of generating plasma inside a BHET in a liquid state.

The plasma electrode according to the present invention can use an electrode capable of generating plasma inside liquid BHET.

As shown in FIG. 5, the plasma electrode according to the present invention may be a wire-wire electrode capable of generating plasma even inside liquid BHET or a surface discharge electrode capable of generating a large amount of plasma. .

6 is a diagram showing an actual example of a heating system.

The plastic decomposition and synthesis gas production system 100 may include a heating system for producing BHET in a liquid state.

The heating system according to the present invention is a system capable of heating a reactor above the melting point of BHET.

The melting point of BHET is between 106 and 109 °C.

The heating system is a system capable of uniformly heating the reactor through a medium.

The heating sequence may be in the order of heater → medium (oil) → reactor (BHET).

7 is a view for explaining a plasma generation position change experiment.

The plastic decomposition and synthesis gas production system 100 has a process feature that determines the amount of gas generated according to the plasma generating location (inside or outside the BHET).

Looking at the gas analysis according to the location of plasma generation, as shown in FIG. 7, it can be confirmed that CO 16 ppm, H ₂ 6 ppm, and NOx 0 ppm are generated inside the liquid BHET (h = 5 mm). That is, if the plasma generation location is inside the BHET, the plastic decomposition and synthesis gas production system 100 may perform the NOx reduction process.

On the liquid BHET surface (h = 0 mm), CO 5927ppm, H ₂ 234ppm, and NOx 82ppm can be confirmed. That is, if the plasma generation location is the BHET surface, the plastic decomposition and syngas production system 100 may perform a syngas generation efficiency process.

The present invention is a technology for decomposing liquid BHET through a plasma reaction and generating synthesis gas in the process.

The present invention is a process including a process of heating BHET to make it into a liquid, a process of reacting the liquid BHET with plasma, and a control system for adjusting the plasma generation location and the amount of BHET.

In the plasma reaction process, it is possible to generate plasma by placing a plasma electrode inside or on the surface of liquid BHET.

When comparing the gas concentrations generated by reacting solid and liquid BHET with plasma, it can be confirmed that using liquid BHET increases the amount of H2 and CO by 119 times and 4445 times, respectively, than using solid BHET. can

According to the present invention, it is possible to adjust and optimize the position of the plasma electrode and the BHET supply amount by confirming the analysis result of the generated gas and reflecting it to the BHET-plasma reaction process.

In the present invention, by adjusting the position of the electrode, it is possible to control the generation amount of syngas or suppress the generation of NOx gas.

Hereinafter, in FIG. 8, a work flow of the syngas production system 100 according to embodiments of the present invention will be described in detail.

8 is a flowchart illustrating a syngas production method according to an embodiment of the present invention.

The syngas production method according to this embodiment may be performed by the syngas production system 100 .

First of all, the plastic decomposition and synthesis gas production system 100 interlocks with the supply of BHET (Bis(2-hydroxyethyl) Terephthalate) to the reaction chamber to melt the BHET to produce liquid BHET in a liquid state (810). Step 810 may be a process of making liquid BHET in a liquid state by applying heat to melt BHET in a solid state supplied to the reaction chamber.

Here, BHET may be a monomeric intermediate material of PET produced by a depolymerization process by mixing waste polyester with ethylene glycol.

In making liquid BHET, the plastic decomposition and syngas production system 100 may employ a heating system capable of heating BHET above its melting point.

That is, the plastic decomposition and synthesis gas production system 100 can uniformly heat the BHET by transferring the heat output from the heater to the BHET through a medium.

Here, the melting point of BHET may be 106 degrees to 109 degrees.

The heating system may include a heater that dissipates heat and a medium such as oil that transfers heat from the heater to the BHET. The medium can heat-lock the glass BHET vessel.

The order of heating by the heating system may be in the order of heater-medium (oil)-reactor (BHET).

In addition, the plastic decomposition and synthesis gas production system 100 reacts plasma generated as power is supplied to the reaction chamber with the liquid BHET to produce synthesis gas (820). Step 820 may be a process of obtaining recyclable synthesis gas by electrically reacting the molten liquid BHET with plasma.

Plasma refers to a state in which negatively charged electrons and positively charged ions are mixed in a neutral gas, and is quasi-neutral because the number of negative and positive charges is almost equal as a whole.

The syngas produced in the plastic decomposition and syngas production system 100 may include CO, H ₂ , and the like as components.

In particular, the plastic decomposition and syngas production system 100 produces syngas using BHET in a liquid state compared to syngas produced from BHET in a conventional solid state, thereby increasing the amount of the components of the syngas produced. can be greatly increased.

In one embodiment, the plastic decomposition and syngas production system 100 can produce syngas by flexibly adjusting the components of the syngas.

To this end, the plastic decomposition and synthesis gas production system 100 may change the composition of the synthesis gas by adjusting the position of the electrode generating the plasma in consideration of the target process.

In the present invention, the position of the electrode to be adjusted may be inside the liquid BHET or outside (surface) of the liquid BHET. The electrode can be exemplified by a wire-wire electrode capable of generating plasma even inside liquid BHET or a surface discharge electrode capable of generating a large amount of plasma.

If the target process is a 'NOx reduction process', the plastic decomposition and synthesis gas production system 100 adjusts the position of the electrode to the inside of the liquid BHET to produce synthesis gas with reduced NOx content and less impurities. can be produced. That is, the plastic decomposition and synthesis gas production system 100 adjusts the position of the electrode into the liquid BHET, and through the reaction between the plasma generated in the liquid BHET and the liquid BHET, CO and H ₂ are converted into main components (NOx). is almost zero), so that a syngas with less impurities can be produced.

If the target process is a 'synthesis gas generation efficiency process', the plastic decomposition and synthesis gas production system 100 adjusts the position of the electrode to the surface of the liquid BHET to make the components of the syngas produced. The respective contents of phosphorus CO and H ₂ can be made close to the numerical values stipulated in advance. That is, the plastic decomposition and synthesis gas production system 100 adjusts the position of the electrode to the outside of the liquid BHET, and through the reaction between the plasma generated outside the liquid BHET and the liquid BHET, synthesis gas containing CO and H ₂ , respectively, is produced. can make it

In one embodiment, the plastic decomposition and syngas production system 100 may automatically supply fresh BHET to the reaction chamber.

To this end, the plastic decomposition and syngas production system 100 measures the height of the liquid BHET in the reaction chamber, and determines the supply of new BHET to the reaction chamber based on the measured height. can That is, the plastic decomposition and syngas production system 100 measures the amount of BHET consumed according to the production of syngas by measuring the height of the liquid BHET remaining in the reaction chamber, and the measured height is the selected reference value If it is below, it is possible to automatically supply new BHET to the reaction chamber.

In another embodiment, the plastic decomposition and syngas production system 100 may control process conditions for producing syngas.

To this end, the plastic decomposition and syngas production system 100 may analyze the syngas to perform feedback and automatic control of process conditions. That is, the plastic decomposition and syngas production system 100 may support feedback and automatic control for adjusting/changing process conditions for producing syngas in the future through analysis of the syngas.

Here, the process conditions refer to process specifications for producing syngas, and examples thereof include designation of a plasma generation location and adjustment of BHET supply timing.

According to one embodiment of the present invention, bis(2-hydroxyethyl) terephthalate (BHET) generated during the depolymerization of PET is decomposed into plasma, and syngas such as CO and H ₂ is generated in the process, A synthesis gas production method and apparatus can be provided.

In addition, according to the present invention, it is possible to solve the problem of plastic waste treatment and utilize it in the field of generating syngas.

In addition, according to the present invention, by using BHET in a liquid state, it is possible to produce a larger amount of CO and H ₂ as compared to conventional technologies using BHET in a solid state.

In addition, according to the present invention, it is possible to efficiently decompose plastic waste and generate syngas by connecting in series or concurrently with the conventional plastic (PET) depolymerization process.

In addition, according to the present invention, it is possible to provide a synthesis gas production method and apparatus that replaces the conventional plastic pyrolysis process.

The syngas production method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program commands recorded on the medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. The device can be commanded. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed on networked computer systems and stored or executed in a distributed syngas production method. Software and data may be stored on one or more computer readable media.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described syngas production method, and/or the described systems, structures, devices, circuits, etc., are combined in a different form than the described syngas production method, or Appropriate results can be achieved even when combined, substituted or substituted by other components or equivalents.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

100: syngas production system
110: heating unit 120: reaction unit
130: control unit 140: analysis unit

Claims (10)

Melting BHET (Bis(2-hydroxyethyl) Terephthalate) in conjunction with the supply of BHET to the reaction chamber to produce liquid BHET in a liquid state;
producing synthesis gas by reacting plasma generated as power is supplied to the reaction chamber with the liquid BHET; and
Through the analysis of the synthesis gas, as a step of changing the 'designation of the location of the plasma generation' as a process condition for producing the synthesis gas later, in consideration of the content of 'NOx' in the synthesis gas, the electrode generating the plasma Changing the 'designation of the location of the plasma generation' so that the position of is adjusted to the inside or surface of the liquid BHET.
Synthesis gas production method comprising a. According to claim 1,
Changing the composition of the syngas by adjusting the position of the electrode in consideration of the target process
Synthesis gas production method further comprising a. According to claim 2,
If the target process is a 'NOx reduction process',
Changing the composition of the syngas,
Adjusting the position of the electrode to the inside of the liquid BHET to produce syngas with reduced NOx content and less impurities.
Synthesis gas production method comprising a. According to claim 2,
If the target process is a 'synthesis gas generation efficiency process',
Changing the composition of the syngas,
Adjusting the position of the electrode to the surface of the liquid BHET so that the content of CO and H ₂ , which are components of the syngas produced, approaches a predefined value.
Synthesis gas production method comprising a. According to claim 1,
The step of melting the BHET to produce liquid BHET in a liquid state,
Uniformly heating the BHET by transferring heat output from the heater to the BHET through a medium.
Synthesis gas production method comprising a. According to claim 1,
measuring the height of the liquid BHET within the reaction chamber; and
Based on the measured height, determining the supply of new BHET to the reaction chamber.
Synthesis gas production method further comprising a. a heating unit that interlocks with the supply of BHET (Bis(2-hydroxyethyl) Terephthalate) to the reaction chamber and melts the BHET to produce liquid BHET in a liquid state;
a reaction unit for producing synthesis gas by reacting plasma generated as power is supplied to the reaction chamber with the liquid BHET; and
An analysis unit that changes the 'designation of the location of plasma generation' as a process condition for producing syngas in the future through analysis of the syngas.
including,
The analysis unit,
Considering the content of 'NOx' in the syngas, the position of the electrode generating the plasma is adjusted to the inside or surface of the liquid BHET, so that the 'designation of the location of the plasma generation' is changed.
Syngas production system. According to claim 7,
The syngas production system,
A controller that changes the composition of the syngas by adjusting the position of the electrode in consideration of the target process
A syngas production system further comprising a. According to claim 8,
If the target process is a 'NOx reduction process',
The control unit,
By adjusting the position of the electrode to the inside of the liquid BHET, so that a syngas with less impurities with reduced NOx content is produced
Syngas production system. According to claim 8,
If the target process is a 'synthesis gas generation efficiency process',
The control unit,
The position of the electrode is adjusted to the surface of the liquid BHET so that the content of CO and H ₂ , which are constituents of the syngas produced, approaches a predetermined value
Syngas production system.

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