Organic hydride producing system, control device for organic hydride producing system, and control method for organic hydride producing system

Abstract

A control device of an organic compound producing system including an electrolytic bath and a catholyte supply device, wherein the electrolytic bath has a cathode chamber for accommodating a cathode electrode for reducing a raw material of an organic compound in a catholyte by electrolysis to generate the organic compound, wherein the catholyte supply device is capable of supplying any catholyte selected from a plurality of the catholytes having different concentrations of the raw material to the cathode chamber, and wherein the control device determines a specific concentration of the raw material according to a magnitude of a current flowing in the electrolytic bath and controls the catholyte supply device so as to supply to the cathode chamber the catholyte having the specific concentration of the raw material as determined.

1 . A control device of an organic compound producing system including an electrolytic bath and a catholyte supply device,
 wherein the electrolytic bath has a cathode chamber for accommodating a cathode electrode for reducing a raw material of an organic compound in a catholyte by electrolysis to generate the organic compound,   wherein the catholyte supply device is capable of supplying any catholyte selected from a plurality of the catholytes having different concentrations of the raw material to the cathode chamber, and   wherein the control device determines a specific concentration of the raw material according to a magnitude of a current flowing in the electrolytic bath and controls the catholyte supply device so as to supply to the cathode chamber the catholyte having the specific concentration of the raw material as determined.   
     
     
         2 . The control device of an organic compound producing system according to  claim 1 ,
 wherein the catholyte supply device includes a plurality of storages that individually store the plurality of catholytes, and   wherein the control device determines a lower limit value of a concentration of the raw material in a catholyte to be supplied to the cathode chamber based on the magnitude of the current, selects a storage that stores a catholyte having the specific concentration of the raw material from among the storages that store a catholyte having a concentration of the raw material equal to or more than the lower limit value, and controls the catholyte supply device so as to supply the catholyte from the selected storage to the cathode chamber.   
     
     
         3 . The control device of an organic compound producing system according to  claim 2 ,
 wherein the control device determines the lower limit value based on a decrease amount of the concentration of the raw material in the cathode chamber in addition to the magnitude of the current.   
     
     
         4 . The control device of an organic compound producing system according to  claim 2 ,
 wherein the control device selects the storage that stores the catholyte having a concentration of the raw material equal to or more than the lower limit value and closest to the lower limit value as the storage that stores the catholyte having the specific concentration of the raw material.   
     
     
         5 . The control device of an organic compound producing system according to  claim 1 ,
 wherein the catholyte supply device at least includes:   a first storage structured to store a first catholyte having a first concentration of the raw material;   a second storage structured to store a second catholyte having a second concentration of the raw material lower than the first concentration of the raw material; and   a third storage capable of receiving supply of the first catholyte from the first storage and supply of the second catholyte from the second storage, and   wherein the control device controls the catholyte supply device so as to supply the first catholyte and the second catholyte to the third storage to generate the catholyte having the specific concentration of the raw material, and to supply the catholyte from the third storage to the cathode chamber.   
     
     
         6 . The control device of an organic compound producing system according to  claim 5 ,
 wherein the control device determines the specific concentration of the raw material based on a decrease amount of the concentration of the raw material in the cathode chamber in addition to the magnitude of the current.