Bio-assisted process for conversion of carbon dioxide to fuel precursors

Patent metadata

Field	Value
Publication number	US-2019292571-A1
Application number	US-201916296172-A
Country	US
Kind code	A1
Filing date	Mar 7, 2019
Priority date	Mar 8, 2018
Publication date	Sep 26, 2019
Grant date	—

Abstract

The present invention provides a semi-conducting biogenic hybrid catalyst capable of reducing CO2 into fuel precursors. Specifically, the present application involves a method for bio-assisted conversion of CO2 to fuel precursors using said semiconducting biogenic hybrid catalyst in batch and continuous mode.

First claim

1 . A semi-conducting biogenic hybrid catalyst capable of reducing CO 2 into fuel precursors, said catalyst consisting:
(a) electroactive microorganism selected from the group consisting of Enterobacter aerogenes MTCC 25016, Serratia sp. MTCC 25017, Shewanella sp. MTCC 25020, Alcaligenes sp. MTCC 25022, Pseudomonas aeruginosa MTCC 1036 , Ochrobactrum anthropi ATCC 49188 , Ochrobactrum anthropi MTCC 9026, and Pseudomonas alcaliphila MTCC 6724; and (b) semi conducting particles comprising a precursor metal component, electron facilitator and dye molecule; wherein the semi conducting particles are located on cell surface of the electroactive microorganisms.

2 . A method for bio-assisted conversion of CO 2 to fuel precursors employing the semiconducting biogenic hybrid catalyst as claimed in claim 1 , said method comprising:
(a) adding the semi-conducting biogenic hybrid catalyst as claimed in claim 1 to culture medium in a transparent reactor; (b) sparging CO 2 through the culture medium and irradiating the transparent reactor with a light source having wavelength >400 nm; and (c) recovering the fuel precursors from the culture medium;
wherein the fuel precursors are selected from the group consisting of methanol, ethanol, acetic acid, butanol, isopropanol, butyric acid, and caproic acid.

3 . A method for bio-assisted conversion of biogas to fuel precursors employing the semiconducting hybrid catalyst as claimed in claim 1 , said method comprising:
(a) adding the semi-conducting biogenic hybrid catalyst as claimed in claim 1 to culture medium in a glass column; (b) sparging biogas through the culture medium and irradiating the glass column with a light source having wavelength >400 nm; and (c) recovering the fuel precursors from the culture medium;
wherein the fuel precursors comprise a mixture of methanol, ethanol, and acetic acid.

4 . A process for synthesizing a semiconductor biogenic-hybrid catalyst, said process comprising:
(a) selectively culturing electroactive microorganisms selected from the group consisting of Enterobacter aerogenes MTCC 25016, Serratia sp. MTCC 25017, Shewanella sp. MTCC 25020, Alcaligenes sp. MTCC 25022, Pseudomonas aeruginosa MTCC 1036 , Ochrobactrum anthropi ATCC 49188 , Ochrobactrum anthropi MTCC 9026, and Pseudomonas alcaliphila MTCC 6724; (b) mixing at least a salt, at least one 2D material, and an electron facilitator, in presence of a surface directing agent to obtain a semiconducting hybrid solution; (c) adding the semiconducting hybrid solution of step (b) to the electroactive microorganism culture of step (a) to obtain an initiator culture; (d) providing counter ion precursor to the initiator culture of step (c); and (e) separating the semiconductor biogenic-hybrid catalyst from the culture; wherein the salt is selected from the group consisting of CuCl 2 , CdCl 2 , ZnCl 2 , ZnBr 2 , GaCl 3 , InCl 3 , FeCl 2 , FeCl 3 , SnCl 2 , SnCl 4 , Cd(NO 3 ) 2 , Ga(NO 3 ) 3 , Ln(NO 3 ) 3 , Zn(NO 3 ) 2 , Fe(NO 3 ) 3 , CdCO 3 , CdSO 4 , FeSO 4 , ZnSO 4 , Fe 2 O 3 , CdO, Ga 2 O 3 , Ln 2 O 3 , ZnO, SnO, SnO 2 , Fe(OH) 3 , Zn(OH) 2 , FeOOH, FeO(OH), Cd(CH 3 COO) 2 , Iron perchlorate, Copper perchlorate, Copper EDTA complex, Nickel alkylamine complex, Iron piperidine complex, Cadmium pyridine complex, Iron bipyridine salt and Iron acac complex; wherein the 2D material is selected from the group consisting of graphene, porous graphene, gC 3 N 4 , single walled CNT, MoS 2 , WS 2 , SnS 2 , phosphorene, graphene nanoparticles, TiC, and borophene; wherein the electron facilitator is selected from the group consisting of neutral red, azo-dyes, Iron porphyrin complex, Schiff base complex, multi walled CNT, Cd (II) or Cu (II) imidazole complex, and Ruthenium complex; wherein the surface directing agent is selected from the group consisting of Tween, sodium lauryl sulfate, p-172, Lauryl dimethyl amine oxide, Cetyltrimethylammonium bromide, Polyethoxylated alcohol, Polyoxyethylene sorbitan Octoxynol (Triton X100), N, N-dimethyldodecyl amine-N-oxide, Hexadecyltrimethylammonium bromide, Polyoxyl 10 lauryl ether, Brij 721, sodium deoxycholate, sodium cholate, Polyoxyl castor oil (Cremophor), Nonylphenol ethoxylate (Tergitol), Cyclodextrins, Lecithin, and Methylbenzethonium chloride (Hyamine); and wherein the counter ion precursor is a gaseous material or an organosulfur compound.

5 . The process as claimed in 4 , wherein the gaseous material is selected from the group consisting of H 2 S containing gas, industrial flue gas, and bio gas.

6 . The process as claimed in claim 4 , wherein the organosulfur compound is selected from the group consisting of methanethiol, ethanethiol, propanethiol, butanethiol, thiophenol, ethanedithiol, 1,3ropanedithiol, 1,4 butanedithiol, thiophene, 2-mercaptoethanol, 3-mercaptopropanol, 4mercaptophenol, dithiothreitol, cysteine, homocysteine, methionine, thioserine, thiothreonine, thiotyrosine, glutathione, 2-thiouracil, 6-methyl-2-thiouracil, 4-thiouracil, 2,4dithiouracil, 2-thiocytosine, 5-methyl-2-thiocytosine, 5-fluoro-2-thiocytosine, 2-thiothymine, 4-thiothymine, 2,4-dithiothymine, 6-thioguanine, 8-thioadenine, 2-thioxanthine, 6-thioxanthine, 6-thiohypoxanthine, 6-thiopurine, dimethyl sulfide, diethyl sulfide, diphenyl sulfide, biotin, cystine, lipoic acid, diphenyl disulfide, iron disulfide, 2-hydroxyethyl di sulfide, thioacetic acid, trimethylsulfonium, diphenylmethyl sulfonium chloride, dimethylsulfoxide, dim ethyl sulfone, thioketone, thioamide, thiocyanate, isothiocyanate, thiocarbamate, and dithiocarbamates.

Assignees

• Indian Oil Corp Ltd

Inventors

• Kumar Manoj
• Sahoo Prakash Chandra
• Sandipam Srikanth
• Puri Suresh Kumar
• RAMAKUMAR Sankara Sri Venkata

Classifications

• C12P7/40

  containing a carboxyl group {including Peroxycarboxylic acids} · CPC title

• C12P7/04

  acyclic · CPC title

• C12P7/065

  with microorganisms other than yeasts · CPC title

• C12P7/54 Primary

  Acetic acid (vinegar C12J) · CPC title

• C12P7/16

  Butanols · CPC title