Catalytic Pyrolysis Reactor for Zero-CO2 Hydrogen Production
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Solution Overview
Problem
Hydrogen production using methane pyrolysis results in waste heat loss and CO2 emissions, which are not only energy wasteful but also contribute to air pollution and climate change.
Innovation Solution
Integrating hydrogen production with a gas turbine system through catalytic pyrolysis, where waste heat from the pyrolysis process is captured and reused within the gas turbine system, thereby eliminating CO2 emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If methane pyrolysis is used for hydrogen production, then hydrogen can be produced without CO2 emissions, but waste heat is lost to the environment
Solution Approach 1:
The patent combines the methane pyrolysis hydrogen production system with a gas turbine power generation system into an integrated combined cycle system. The pyrolysis reactor is thermally coupled with the gas turbine, allowing waste heat from pyrolysis to be recovered and utilized for power generation, thereby eliminating both CO2 emissions and waste heat loss simultaneously
Solution Approach 2:
The patent converts the waste heat that would normally be lost during methane pyrolysis into a useful resource by directing it to the gas turbine combustor. This heat conversion transforms a harmful energy loss into beneficial power generation, improving overall system efficiency while maintaining zero CO2 emissions
2Device complexity
If waste heat is lost during hydrogen production, then the process is simple, but energy efficiency is reduced
Solution Approach 1:
The patent merges two previously separate processes (methane pyrolysis and gas turbine power generation) into an integrated system where the waste heat from pyrolysis is directly utilized by the gas turbine. This combination increases energy efficiency while the modular design maintains reasonable process complexity
Solution Approach 2:
The integrated system enables the methane pyrolysis process to serve multiple functions: hydrogen production, waste heat generation for power generation, and carbon utilization. The gas turbine simultaneously performs power generation and utilizes waste heat, creating a multi-functional system that improves energy efficiency
3Object-generated harmful factors
If CO2 is captured and stored, then emissions are reduced, but additional equipment and complexity are required
Solution Approach 1:
The patent extracts and eliminates CO2 emissions at the source by using catalytic methane pyrolysis instead of combustion-based processes. The pyrolysis reaction (CH4 → C + 2H2) inherently produces no CO2, removing the need for CO2 capture equipment entirely and simplifying the overall system
Solution Approach 2:
The patent changes the fundamental reaction parameter from combustion (which produces CO2) to catalytic pyrolysis (which does not). This parameter change in the chemical process fundamentally alters the emission profile, eliminating CO2 at the source rather than requiring post-combustion capture
4Object-generated harmful factors
If catalytic pyrolysis is used, then CO2 emissions are eliminated, but thermal energy must be supplied to the reactor
Solution Approach 1:
The integrated system enables the gas turbine to utilize the waste heat from the pyrolysis reactor to generate power, while the pyrolysis reactor receives thermal energy from the gas turbine exhaust. This self-service arrangement allows the system to sustain itself thermally without external energy input, improving overall efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integration enhances the overall efficiency of power generation and hydrogen production by converting waste heat into usable energy, while achieving zero CO2 emissions.
Implementation Method 1
a catalytic pyrolysis reactor configured to: (i) produce a hydrogen containing gas by pyrolyzing a hydrocarbon introduced therein
Implementation Method 2
be in thermal contact with the heated gas of the heated gas supply line
Implementation Method 3
a separator configured to extract a hydrogen gas from the hydrogen containing gas discharged from the catalytic pyrolysis reactor
Implementation Method 4
a gas turbine having a combustor configured to burn the hydrogen gas introduced therein from the separator
Data Source
AI summary
A system includes a hydrogen gas production system and a power generation system. The hydrogen gas production system includes a heated gas supply line configured for flow of a heated gas, a hydrocarbon supply line, a catalytic pyrolysis reactor configured to be in thermal contact with the heated gas of the heated gas supply line and produce a hydrogen containing gas by pyrolyzing a hydrocarbon introduced therein via the hydrocarbon supply line, and a separator configured to extract a hydrogen gas from the hydrogen containing gas discharged from the catalytic pyrolysis reactor. The power generation system includes a heated gas collection line configured to collect the heated gas after the thermal contact with the catalytic pyrolysis reactor and supply the heated gas to the power generation system, and a gas turbine having a combustor configured to burn the hydrogen gas introduced therein from the separator via a hydrogen supply line.