Institute of Chemical Technology

Indian Institute of Technology Delhi

Ongc Energy Centre Trust

Ongc Energy Centre

Ongc Energy Centre Trust Oil and Natural Gas Corporation

Ongc Energy Centre Trust Oil and Natural Gas Corporation Limited (ongc)

Parvatalu Damaraju

Ganapati Dadasaheb Yadav

Bantwal Narayana Prabhu

Nuzhath Joeman Thomas

Dilip Madhusudan Kale

Ashwini Bhagavan Nirukhe

Anil Bhardwaj

Prakash Santoshrao Parhad

Sreedevi Upadhyayula

Bharat Bhargava

Prabhu Bantwal Narayana

Thomas Nuzhath Joeman

Kale Dilip Madhusudan

Bhardwaj Anil

Ashok Niwritti Bhaskarwar

Satinath Banerjee

Yadav Ganapati Dadasaheb

Kishore Kondamudi

Parhad Prakash Santoshrao

Nirukhe Ashwini Bhagavan

A process for decomposition of sulfuric acid, particularly a process for catalytically decomposing sulfuric acid is used to obtain sulfur dioxide therefrom. Catalysts are used for improving the dissociation efficiency by lowering the activation energy barrier for the reaction.

Process for conversion of sulfur trioxide and hydrogen production

The electrolysis of cuprous chloride was carried out in the electrochemical cell. The particle size, current density, cathodic current efficiency, conversion of cuprous chloride and yield of copper formed depends strongly on current flow, heat transfer and mass transfer operation. The current flow, heat transfer and mass transfer are depends on surface area ratio of anode to cathode, distance between electrodes, concentration of HCl, applied voltage, flow rate of electrolyte, CuCl concentration and reaction temperature. The electrolysis of cuprous chloride as a part of Cu&#x2014;Cl thermochemical cycle for hydrogen production is experimentally demonstrated in proof-of-concept work.

Effect of operating parameters on the performance of electrochemical cell in copper-chlorine cycle

The electrochemical cell consists of hollow tube and centralized copper rod. The tubes have first and second ends. The first end cap is used to close the first open end. The anolyte inlet is extended through the first end cap in anolyte compartment and catholyte inlet is extended through the first end cap in catholyte compartment. The anolyte and catholyte compartments are separated by ion exchange membrane fixed over inner hollow tube having holes on the surface. A first Teflon gasket has provision for inlet of anolyte and catholyte tube is secured between first tubes end and first end cap. The copper rod is placed at the center of the tubes acts as cathode. The circular ring works as scrapper to take out deposited copper is provided. A second end cap is used to close the second open. A second Teflon gasket is secured between second tubes end and second end cap. The second end cap has provision for anolyte outlet and comprises a conical dome to collect the deposited copper and transport it along with catholyte. The anolyte trappers and catholyte trappers are connected through the tubes to anolyte and catholyte half cells. The anolyte and catholyte are re-circulated through peristaltic pumps, one on each side.

Electrochemical cell used in production of hydrogen using Cu&#x2014;Cl thermochemical cycle

The present invention discloses a method for thermochemical production of hydrogen and oxygen from water by a low temperature, multi-step, closed, cyclic copper-chlorine (Cu&#x2014;Cl) process involving the reactions of copper and chlorine compounds. A method for production of hydrogen via Cu&#x2014;Cl thermochemical cycle consists of four thermal reactions and one electrochemical reaction and one unit operation. The cycle involves six steps: (1) hydrogen production step; (2) copper production step; (3) drying step; (4) hydrogen chloride production step; (5) decomposition step; (6) oxygen production step. The net reaction of the sequential process is the decomposition of water into hydrogen and oxygen. The methods for production of copper oxide which comprises contacting copper chloride particles with superheated steam and production of oxygen comprises reaction of copper oxide with dry chlorine as a part of hydrogen production by thermochemical Copper-Chlorine (Cu&#x2014;Cl) cycle. The reactions are performed in a flow through type quartz reactor as fixed bed type at high temperature and atmospheric pressure.

Hydrogen production method by multi-step copper-chlorine thermochemical cycle

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New Delhi, India

Parvatalu Damaraju