Catalyst for hydrogenation reaction comprising alginate-carbon beads and method of manufacturing same

Abstract

A catalyst for a hydrogenation reaction comprising alginate-carbon beads and a method for preparing the same are provided. The catalyst comprises: an alginate having pores and cross-linked by ions of a polyvalent metal; a carbon material dispersed in the alginate; and a metal supported on one or more selected from the group consisting of the alginate and the carbon material. This allows for the provision of a catalyst for the hydrogenation reaction of furfural with a carbon-containing bead-shaped Pd / C catalyst.

Description

Technology Field

[0001] The present invention relates to a catalyst for a hydrogenation reaction comprising alginate-carbon beads and a method for preparing the same. Background Technology

[0002] Molding catalysts is essential for industrial use, and recently, an eco-friendly method of shaping catalysts using biopolymer materials is gaining attention. Molded catalysts have the advantages of being easy to handle and recover, and convenient for reuse.

[0003] Conventional methods for manufacturing molded catalysts involve first preparing a catalyst in powder form using metal precursors and oxide supports via impregnation or precipitation methods, and then producing a molded catalyst using a molding device with various binders and additives. While this method is intuitive and suitable for mass production, it has the disadvantage that active metal particles may not be uniformly dispersed during the manufacturing process, potentially leading to low utilization of the active metal. Prior art literature

[0004] Korean Registered Patent No. 10-2548892 The problem to be solved

[0005] The objective of the present invention is to solve the above problems by providing a carbon-containing bead-type Pd / C catalyst and a catalyst for a hydrogenation reaction.

[0006] In addition, the invention provides a catalyst prepared by substituting a hydrogel with an alcogel to improve the stability of the catalyst. means of solving the problem

[0007] According to one aspect of the present invention, a catalyst is provided comprising: an alginate having pores and cross-linked by ions of a polyvalent metal; a carbon material dispersed in the alginate; and a metal supported on one or more selected from the group consisting of the alginate and the carbon material.

[0008] In addition, the above catalyst may be intended for use in a hydrogenation reaction.

[0009] In addition, the alginate cross-linked by the ions of the aforementioned polyvalent metal may be in the form of beads.

[0010] In addition, the above polyvalent metal may include one or more selected from the group consisting of Ca, Be, Mg, Sr, Ba, Mn, Fe, Co, Ni, and Zn.

[0011] In addition, the carbon material may include one or more selected from the group consisting of activated carbon, carbon black, carbon nanotubes, carbon nanofibers, graphene, and graphite.

[0012] In addition, the metal may include one or more selected from the group consisting of Pd, Pt, Rh, Ru, Ir, Os, Ni, Co, Cu, and Fe.

[0013] In addition, the carbon material may be surface-treated with acid and may include one or more selected from the group consisting of carboxyl groups and hydroxyl groups on the surface of the carbon material.

[0014] In addition, the catalyst may contain 100 to 400 parts by weight of the carbon material with respect to 100 parts by weight of the alginate.

[0015] In addition, the pore volume of the catalyst is 0.1 to 2 cm 3 It can be / g.

[0016] In addition, the specific surface area of ​​the catalyst is 300 to 1000 m² 2 It can be / g.

[0017] In addition, the diameter of the bead may be 1 to 10 mm.

[0018] In addition, the size of the pores may be 1 to 80 nm.

[0019] In addition, the metal may be included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total weight of the alginate and carbon material.

[0020] According to another aspect of the present invention, a method for manufacturing a catalyst is provided, comprising: (a) preparing a first solution comprising alginate, a carbon material, and water; (b) mixing the first solution with a second solution comprising ions of a polyvalent metal and water to produce carbon-alginate hydrogel beads; (c) impregnating the carbon-alginate hydrogel beads with alcohol to produce carbon-alginate alcohol gel beads; and (d) supporting a metal on the carbon-alginate alcohol gel beads to produce a catalyst comprising metal-supported carbon-alginate alcohol gel beads.

[0021] Additionally, the above step (a) may include (a-1) a step of preparing an aqueous alginate solution comprising alginate and water; and (a-2) a step of preparing a first solution comprising the aqueous alginate solution and a carbon material.

[0022] Additionally, the above step (b) may include (b-1) a step of preparing a second solution containing ions of a polyvalent metal and water; and (b-2) a step of preparing carbon-alginate hydrogel beads by adding the first solution in a dropwise form to the second solution.

[0023] Additionally, the above step (d) may include: (d-1) a step of preparing a metal precursor solution containing a metal precursor; (d-2) a step of preparing a mixture by mixing the metal precursor solution and the carbon-alginate alcohol gel beads; and (d-3) a step of preparing a catalyst containing metal-supported carbon-alginate alcohol gel beads by adding a reducing agent to the mixture and reducing the metal precursor.

[0024] In addition, after step (d), the method for manufacturing the catalyst may further include step (e) of drying the metal-supported carbon-alginate alcohol gel beads to produce a catalyst comprising metal-supported carbon-alginate beads.

[0025] According to another aspect of the present invention, a method for hydrogenating furfural is provided, comprising the step of hydrogenating furfural (FF) in the presence of a catalyst to produce one or more selected from the group consisting of furfuryl alcohol (FAL), tetrahydrofurfuryl alcohol (THFAL), tetrahydrofurfural (THFF), and 2-methylfuran (2-MF).

[0026] In addition, the catalyst may include a metal supported on one or more selected from the group consisting of an alginate that has pores and is cross-linked by ions of a polyvalent metal, a carbon material dispersed in the alginate, and the alginate and the carbon material. Effects of the invention

[0027] The present invention can provide a carbon-containing bead-type Pd / C catalyst and a catalyst for the hydrogenation reaction of furfural.

[0028] In addition, an alcogel catalyst with improved stability can be provided by substituting the hydrogel with an alcogel.

[0029] In addition, by including palladium and increasing the effective metal area on the surface of the support to increase the reaction active sites, a catalyst with high dispersion can be provided.

[0030] In addition, the above catalyst has the effect of exhibiting high performance in the furfural hydrogenation reaction. Brief explanation of the drawing

[0031] These drawings are for reference to explain exemplary embodiments of the present invention, and therefore, the technical concept of the present invention should not be interpreted as being limited to the attached drawings. FIG. 1 is a flowchart illustrating a method for manufacturing a catalyst comprising carbon-alginate alcogel beads of the present invention. FIG. 2 is a schematic diagram showing a method for manufacturing carbon-alginate alcogel beads of the present invention. Figure 3 shows the bead shape and surface shape (SEM) of the comparative example and Example 1 of the present invention. Figure 4 shows the specific surface area and pore size (BET) of the comparative example and Example 1 of the present invention. Figure 5 shows the compressive strength results of the comparative example and Example 1 of the present invention. Specific details for implementing the invention

[0032] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention.

[0033] However, the following description is not intended to limit the present invention to specific embodiments, and detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions could obscure the essence of the present invention.

[0034] The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to indicate the presence of the features, numbers, steps, actions, components, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, or combinations thereof.

[0035] Additionally, terms including ordinal numbers, such as "first," "second," etc., used below may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0036] Furthermore, when it is stated that a component is "formed" or "laminated" on another component, it should be understood that while it may be formed or laminated by being directly attached to the entire surface or one surface of the other component, there may also be other components present in between.

[0037] Hereinafter, a catalyst for a hydrogenation reaction comprising alginate-carbon beads and a method for manufacturing the same will be described in detail. However, this is presented as an example and is not intended to limit the present invention, and the present invention is defined only by the scope of the claims set forth below.

[0038] The present invention provides a catalyst comprising: an alginate having pores and cross-linked by ions of a polyvalent metal; a carbon material dispersed in the alginate; and a metal supported on one or more selected from the group consisting of the alginate and the carbon material.

[0039] In addition, the above catalyst may be intended for use in a hydrogenation reaction.

[0040] In addition, the alginate cross-linked by the ions of the aforementioned polyvalent metal may be in the form of beads.

[0041] In addition, the above polyvalent metal may include one or more selected from the group consisting of Ca, Be, Mg, Sr, Ba, Mn, Fe, Co, Ni, and Zn.

[0042] In addition, the shape of the alginate can be maintained through ionotropic gelation by cross-linking with divalent ions.

[0043] In addition, the above alcogel can be formed by immersing a hydrogel containing carbon and alginate in ethanol.

[0044] In addition, the carbon material may include one or more selected from the group consisting of activated carbon, carbon black, carbon nanotubes, carbon nanofibers, graphene, and graphite, preferably carbon black.

[0045] In addition, the metal may include one or more selected from the group consisting of Pd, Pt, Rh, Ru, Ir, Os, Ni, Co, Cu, and Fe.

[0046] In addition, the carbon material may be surface-treated with acid and may include one or more selected from the group consisting of carboxyl groups and hydroxyl groups on the surface of the carbon material.

[0047] In addition, the catalyst may contain 100 to 400 parts by weight of the carbon material with respect to 100 parts by weight of the alginate. If the carbon material is less than 100 parts by weight with respect to 100 parts by weight of the alginate, the active metal is not fully supported and the strength of the material is weakened, which is undesirable. If it exceeds 200 parts by weight, it becomes difficult to uniformly mix the carbon alginate solution, which may cause nozzle clogging, which is also undesirable.

[0048] In addition, the pore volume of the catalyst is 0.1 to 2 cm 3 It may be / g. The pore volume of the catalyst is 0.1 cm. 3 If it is less than / g, the mass transfer rate decreases, which becomes a factor that lowers catalytic activity and is undesirable, and 2 cm 3 If it exceeds / g, the strength weakens and the stability of the catalyst decreases, which is undesirable.

[0049] In addition, the specific surface area of ​​the catalyst is 300 to 1000 m² 2 / g, preferably 400 to 500m 2 It may be / g. The specific surface area of ​​the above catalyst is 300 m² 2 If it is less than / g, the active sites on which the metal is supported decrease, resulting in uneven metal loading, which becomes a factor that lowers the activity of the catalyst and is therefore undesirable.

[0050] In addition, the diameter of the beads may be 1 to 10 mm, preferably 1 to 5 mm. If the diameter of the beads is less than 1 mm, it is undesirable because the size of the catalyst is small and separation and recovery are not easy, and if it exceeds 10 mm, it is undesirable because the cross-linking of the alginate is insufficient, resulting in low strength and stability.

[0051] In addition, the size of the pores may be 1 to 80 nm. If the pore size is less than 1 nm, it is undesirable because the low pore size results in a low material transfer rate and a decrease in the activity of the catalyst, and if it exceeds 80 nm, it is undesirable because the stability of the catalyst decreases due to low mechanical strength resulting from the large pore size.

[0052] In addition, the metal may be included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total weight of the alginate and carbon material. If the metal is less than 0.1 parts by weight based on 100 parts by weight of the total weight of the alginate and carbon material, the active metal content is low and the activity of the catalyst is low, which is undesirable; and if it exceeds 10 parts by weight, the active metal is not completely supported on the bead-type catalyst, which is undesirable.

[0053] According to another aspect of the present invention, a method for manufacturing a catalyst is provided, comprising: (a) preparing a first solution comprising alginate, a carbon material, and water; (b) mixing the first solution with a second solution comprising ions of a polyvalent metal and water to produce carbon-alginate hydrogel beads; (c) impregnating the carbon-alginate hydrogel beads with alcohol to produce carbon-alginate alcohol gel beads; and (d) supporting a metal on the carbon-alginate alcohol gel beads to produce a catalyst comprising metal-supported carbon-alginate alcohol gel beads.

[0054] Additionally, the above step (a) may include (a-1) a step of preparing an aqueous alginate solution comprising alginate and water; and (a-2) a step of preparing a first solution comprising the aqueous alginate solution and a carbon material.

[0055] In addition, step (b) can be stirred overnight at a speed of 100 to 700 rpm, preferably 600 rpm. If step (a) is less than 100 rpm, it is undesirable because the alginate aqueous solution and carbon are not stirred evenly, and if it exceeds 700 rpm, it is undesirable because the solution splashes out to the surroundings and the carbon content changes.

[0056] Additionally, the above step (b) may be performed for 1 to 3 hours, preferably 2 hours. If the above step (b) is performed for less than 1 hour, the alginate does not sufficiently ion exchange with calcium, so sodium remains in the alginate, which is undesirable.

[0057] Additionally, the above step (b) may include (b-1) a step of preparing a second solution containing ions of a polyvalent metal and water; and (b-2) a step of preparing carbon-alginate hydrogel beads by adding the first solution in a dropwise form to the second solution.

[0058] Additionally, the above step (d) may include: (d-1) a step of preparing a metal precursor solution containing a metal precursor; (d-2) a step of preparing a mixture by mixing the metal precursor solution and the carbon-alginate alcohol gel beads; and (d-3) a step of preparing a catalyst containing metal-supported carbon-alginate alcohol gel beads by adding a reducing agent to the mixture and reducing the metal precursor.

[0059] In addition, after step (d), the method for manufacturing the catalyst may further include step (e) of drying the metal-supported carbon-alginate alcohol gel beads to produce a catalyst comprising metal-supported carbon-alginate beads.

[0060] In addition, the above step (e) may be performed at a temperature of 100 to 120°C. If the above step (e) is performed at a temperature below 100°C, the moisture in the catalyst is not completely evaporated, so water remains in the catalyst, which is undesirable, and if the temperature exceeds 120°C, the structure of the alginate decomposes, resulting in a decrease in strength or the destruction of the shape of the catalyst, which is undesirable.

[0061] Additionally, steps (d-1) and (d-2) may be performed for 1 to 3 hours, preferably 2 hours. If steps (d-1) and (d-2) are performed for less than 1 hour, it is undesirable because diffusion does not occur sufficiently and water is not replaced with alcohol.

[0062] According to another aspect of the present invention, a method for hydrogenating furfural is provided, comprising the step of hydrogenating furfural (FF) in the presence of a catalyst to produce one or more selected from the group consisting of furfuryl alcohol (FAL), tetrahydrofurfuryl alcohol (THFAL), tetrahydrofurfural (THFF), and 2-methylfuran (2-MF).

[0063] In addition, the catalyst may include a metal supported on one or more selected from the group consisting of an alginate that has pores and is cross-linked by ions of a polyvalent metal, a carbon material dispersed in the alginate, and the alginate and the carbon material.

[0064] [Example]

[0065] Hereinafter, preferred embodiments of the present invention will be described. However, this is for illustrative purposes only and does not limit the scope of the present invention.

[0066] Preparation Example: Preparation of Carbon-Alginate Beads

[0067] Preparation Example 1: Preparation of Carbon-Alginate Bead Alcogel Immersed in Alcohol

[0068] To obtain a homogeneous solution, 3.0 g of sodium alginate was poured into 150 mL of deionized water while stirring for 2 hours to prepare an alginate solution (2% w / v). Then, 4 g of carbon was added to the mixture and mixed using a homogenizer at 600 rpm for 24 hours. To form carbon-alginate hydrogel beads, the homogeneous alginate-carbon solution was added dropwise to a 4% (w / v) calcium chloride solution while slowly stirring for 2 hours. Afterward, the hydrogel was immersed in ethanol overnight to form an alcogel support. The prepared alcogel was stored in ethanol for further use to finally produce carbon-alginate bead alcogels.

[0069] Preparation Example 2: Preparation of carbon-alginate beads not immersed in alcohol (C-AB)

[0070] To obtain a homogeneous solution, 3.0 g of sodium alginate was poured into 150 mL of deionized water while stirring for 2 hours to prepare an alginate solution (2% w / v). Then, 4 g of carbon was added to the mixture and mixed using a homogenizer at 4000 rpm for 2 hours. To form carbon-alginate hydrogel beads, the homogeneous alginate-carbon solution was added dropwise to a 4% (w / v) calcium chloride solution while slowly stirring for 2 hours. Afterward, the beads were washed three times with deionized water to remove excess sodium and calcium ions. The washed beads were stored in water for further use to produce the final carbon-alginate beads.

[0071] Example: Preparation of Palladium-Supported Catalyst

[0072] Example 1: Preparation of Pd / CA Catalyst

[0073] The alcogel prepared in Preparation Example 1 was synthesized by a chemical reduction method and reduced with sodium borohydride using ethanol as a solvent. 0.1 M H2PdCl4 was dissolved in 100 ml of a 0.526 mM trisodium tartrate solution at 5°C while stirring at 200 rpm. Then, 19 g of the wet alcogel prepared in Preparation Example 1 was added to the Pd precursor solution and stirred continuously for 24 hours. After continuous stirring, 0.3 M sodium borohydride containing ethanol as a solvent was added dropwise to the solution to [prepare] Pd 2+ The ions were reduced for 2 hours. The prepared bead-type Pd / C catalyst was activated in ethanol using a 100 mL autoclave reactor under a hydrogen or nitrogen atmosphere. Finally, the resulting black spherical beads were washed with ethanol and dried in an 80°C oven to prepare the final Pd / CA catalyst.

[0074] Example 2: Catalytic Activation

[0075] Example 2-1: Pd / CAH 2 (50) Catalyst manufacturing

[0076] In the preparation process of Example 1, the final activated Pd / CA-H2 (50) catalyst was prepared by activating it in ethanol at a temperature of 50°C for 2 hours using an autoclave reactor in a hydrogen atmosphere.

[0077] Example 2-2: Pd / CAH 2 (100) Catalyst manufacturing

[0078] A final activated Pd / CA-H2 (100) catalyst was prepared in the same manner as in Example 2-1, except that it was activated at a temperature of 100°C instead of 50°C.

[0079] Examples 2-3: Pd / CAH 2 (150) Catalyst manufacturing

[0080] A final activated Pd / CA-H2 (150) catalyst was prepared in the same manner as in Example 2-1, except that it was activated at a temperature of 150°C instead of 50°C.

[0081] Examples 2-4: Pd / CAN 2 (50) Catalyst manufacturing

[0082] In the preparation process of Example 1, the final activated Pd / CA-N2 (50) catalyst was prepared by activating it in ethanol at a temperature of 50°C for 2 hours using an autoclave reactor in a nitrogen atmosphere.

[0083] Examples 2-5: Pd / CAN 2 (100) Catalyst manufacturing

[0084] A final activated Pd / CA-N2 (100) catalyst was prepared in the same manner as in Examples 2-4, except that it was activated at a temperature of 100°C instead of 50°C.

[0085] Examples 2-6: Pd / CAN 2 (150) Catalyst manufacturing

[0086] A final activated Pd / CA-N2 (150) catalyst was prepared in the same manner as in Examples 2-4, except that it was activated at a temperature of 150°C instead of 50°C.

[0087] Comparative Example: Preparation of Pd / C-AB Catalyst

[0088] Spherical Pd / C-AB catalysts were synthesized by a chemical reduction method and reduced using sodium borohydride as a reducing agent. 0.1 M H2PdCl4 was dissolved in 100 ml of a 0.526 mM trisodium tartrate solution at 5°C while stirring at 200 rpm. Then, 19 g of the wet C-AB support prepared in Preparation Example 2 was added to the Pd precursor solution and stirred continuously for 24 hours. After continuous stirring, 100 ml of a 0.3 M sodium borohydride solution was added dropwise to the solution to [reduce] the Pd 2+The ions were reduced for 2 hours. The black spherical beads produced were washed and then dried using a freeze dryer to prepare the final Pd / C-AB catalyst.

[0089] Table 1 below summarizes the conditions in the manufacturing process of Examples 1 to 2-6 and the Comparative Example.

[0090] division Alcohol immersion activate Activating gas Activation temperature (°C) Example 1 O - - Example 2-1 O H2 50 Example 2-2 O H2 100 Examples 2-3 O H2 150 Examples 2-4 O H2 50 Examples 2-5 O N2 100 Examples 2-6 O N2 150 Comparative example X - -

[0091] [Test Example]

[0092] Test Example 1: Verification of bead shape and surface morphology

[0093] Figure 3 shows the bead shape and surface shape (SEM) of the comparative example and Example 1 of the present invention.

[0094] Referring to Figure 3, it was confirmed that the carbon-alginate hydrogel beads shrank to a diameter of 2.93 mm as moisture within the catalyst evaporated during the drying process, whereas the carbon-alginate alcogel beads maintained their shape during the drying process and had a size of 3.6 mm. Additionally, in the SEM results, regarding the surface appearance of the catalyst, it was observed that the pores of the carbon-alginate hydrogel beads were blocked due to shrinkage, whereas the pores of the carbon-alginate alcogel beads were maintained and pores were observed in the surface appearance.

[0095] Test Example 2: Confirmation of Specific Surface Area and Pore Size

[0096] Figure 4 shows the specific surface area and pore size (BET) of the comparative example and Example 1 of the present invention.

[0097] Table 2 summarizes the specific surface area and pore size (BET) of the comparative example and Example 1 of the present invention.

[0098] division Specific surface area(m 2 / g) Pore volume(cm 3 / g) BeadDiameter(mm) Comparative example 688.12 0.63 2.93 Example 1 421.18 1.06 3.60

[0099] Referring to Figure 4 and Table 2, the results of nitrogen adsorption and desorption analysis and pore volume distribution showed that the carbon-alginate hydrogel beads had reduced pore volume and pore diameter due to pore shrinkage, while the carbon-alginate alcogel beads maintained a porous structure and had high pore volume and pore diameter.

[0100] Test Example 3: Compressive Strength Analysis

[0101] Figure 5 shows the compressive strength results of the comparative example and Example 1 of the present invention.

[0102] Referring to Figure 5, the carbon-alginate hydrogel bead catalyst exhibited a phenomenon where the catalyst broke when compression was applied. However, the carbon-alginate alcogel beads showed flexible properties where the shape was not destroyed when compression was applied to the catalyst. Compared to the alginate hydrogel, the catalyst prepared with alginate alcogel exhibited a form with excellent viscoelasticity after drying. This confirmed that the carbon-alginate alcogel catalyst possesses high stability with minimal damage to the catalyst.

[0103] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

Claims

Claim 1 A catalyst comprising: an alginate containing pores and cross-linked by ions of a polyvalent metal; a carbon material dispersed in the alginate; and a metal supported on one or more selected from the group consisting of the alginate and the carbon material; wherein the polyvalent metal comprises one or more selected from the group consisting of Ca, Be, Mg, Sr, and Ba, and the supported metal comprises one or more selected from the group consisting of Pd, Pt, Rh, Ru, Ir, and Os, and is intended for use in a hydrogenation reaction. Claim 2 delete Claim 3 A catalyst according to claim 1, characterized in that the alginate cross-linked by the ions of the polyvalent metal is in the form of beads. Claim 4 delete Claim 5 A catalyst according to claim 1, characterized in that the carbon material comprises one or more selected from the group consisting of activated carbon, carbon black, carbon nanotubes, carbon nanofibers, graphene, and graphite. Claim 6 delete Claim 7 A catalyst according to claim 1, characterized in that the carbon material is surface-treated with an acid and the surface of the carbon material comprises one or more selected from the group consisting of carboxyl groups and hydroxyl groups. Claim 8 A catalyst according to claim 1, characterized in that the catalyst comprises 100 to 400 parts by weight of the carbon material with respect to 100 parts by weight of the alginate. Claim 9 In claim 1, the pore volume of the catalyst is 0.1 to 2 cm 3 A catalyst characterized by being / g. Claim 10 In claim 1, the specific surface area of ​​the catalyst is 300 to 1000 m² 2 A catalyst characterized by being / g. Claim 11 A catalyst according to claim 3, characterized in that the diameter of the bead-shaped alginate is 1 to 10 mm. Claim 12 A catalyst according to claim 1, characterized in that the size of the pores is 1 to 80 nm. Claim 13 A catalyst according to claim 1, characterized by containing 0.1 to 10 parts by weight of the metal based on 100 parts by weight of the total weight of the alginate and carbon material. Claim 14 (a) a step of preparing a first solution comprising alginate, a carbon material, and water; (b) a step of preparing carbon-alginate hydrogel beads by mixing the first solution with a second solution comprising ions of a polyvalent metal and water; (c) a step of preparing carbon-alginate alcohol gel beads by impregnating the carbon-alginate hydrogel beads with alcohol; (d) a step of preparing metal-supported carbon-alginate alcohol gel beads by supporting a metal on the carbon-alginate alcohol gel beads; and (e) a step of preparing a catalyst comprising metal-supported carbon-alginate beads by drying the metal-supported carbon-alginate alcohol gel beads; wherein the polyvalent metal in step (b) is Ca, Be, Mg. A method for preparing a catalyst, comprising one or more selected from the group consisting of Sr and Ba, wherein the supported metal of step (d) comprises one or more selected from the group consisting of Pd, Pt, Rh, Ru, Ir, and Os, and wherein the catalyst of step (e) is intended for use in a hydrogenation reaction. Claim 15 A method for manufacturing a catalyst according to claim 14, wherein step (a) comprises: (a-1) a step of preparing an aqueous alginate solution containing alginate and water; and (a-2) a step of preparing a first solution containing the aqueous alginate solution and a carbon material. Claim 16 A method for manufacturing a catalyst according to claim 14, wherein step (b) comprises: (b-1) a step of preparing a second solution containing ions of a polyvalent metal and water; and (b-2) a step of preparing carbon-alginate hydrogel beads by adding the first solution in a dropwise form to the second solution. Claim 17 A method for manufacturing a catalyst according to claim 14, wherein step (d) comprises: (d-1) a step of preparing a metal precursor solution containing a metal precursor; (d-2) a step of preparing a mixture by mixing the metal precursor solution and the carbon-alginate alcohol gel beads; and (d-3) a step of preparing a catalyst containing metal-supported carbon-alginate alcohol gel beads by adding a reducing agent to the mixture and reducing the metal precursor. Claim 18 delete Claim 19 A method for hydrogenating furfural, comprising the step of hydrogenating furfural (FF) in the presence of a catalyst according to claim 1 to produce one or more selected from the group consisting of furfuryl alcohol (FAL), tetrahydrofurfuryl alcohol (THFAL), tetrahydrofurfural (THFF), and 2-methylfuran (2-MF). Claim 20 delete

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