Modified Red Mud Catalyst for Autothermal Reforming
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Solution Overview
Problem
Current catalyst technologies for autothermal reforming of methane are inadequate in providing cost-effective and durable solutions due to rapid deactivation from coke formation and high temperatures, leading to inefficiencies in hydrogen production.
Innovation Solution
The use of modified red mud as a catalyst composition containing Periodic Table Group VIB metal oxides, such as chromium, molybdenum, and tungsten, along with nickel, which acts as both a catalyst and support, enhancing acidity and stability for autothermal reforming processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional catalysts are used for methane reforming, then hydrogen production can be achieved, but rapid deactivation occurs due to coke formation on the catalyst surface
Solution Approach 1:
The patent modifies the chemical parameters of the catalyst by incorporating Periodic Table Group VIB metal oxides (chromium, molybdenum, or tungsten) into the red mud composition. These metal oxides alter the surface chemistry and acidity of the catalyst, reducing coke formation and preventing rapid deactivation while maintaining hydrogen production efficiency
Solution Approach 2:
The patent creates a composite catalyst material by combining red mud with Periodic Table Group VIB metal oxides. This composite structure leverages the synergistic effects of the red mud support and the metal oxide active sites, achieving both high productivity and reliability by preventing coke formation while maintaining catalytic activity for hydrogen production
2Productivity
If high temperatures are applied for methane conversion, then conversion efficiency improves, but catalyst deactivation occurs through sintering or coking
Solution Approach 1:
The patent modifies the thermal and chemical parameters of the catalyst by incorporating Periodic Table Group VIB metal oxides into red mud. These modifications enhance the catalyst's thermal stability and resistance to sintering, allowing operation at high temperatures needed for efficient methane conversion while preventing catalyst deactivation
Solution Approach 2:
The patent converts the potential harm of high temperatures (which cause sintering and coking) into a benefit by using Periodic Table Group VIB metal oxides that stabilize the catalyst structure. The metal oxides act as structural promoters that prevent sintering at high temperatures, allowing the process to operate at optimal conversion temperatures without catalyst degradation
3Ease of manufacture
If standard catalyst compositions are used, then the process can proceed, but cost-effectiveness and durability are insufficient
Solution Approach 1:
The patent uses red mud, a cheap waste material from alumina production, as the catalyst support. This low-cost material is modified with small amounts of Periodic Table Group VIB metal oxides to extend its使用寿命 and durability, achieving cost-effectiveness without sacrificing process durability
Solution Approach 2:
The patent modifies the compositional parameters of the inexpensive red mud by adding Periodic Table Group VIB metal oxides. This modification transforms the waste material into a durable catalyst that maintains activity over extended periods, achieving both cost-effectiveness and durability simultaneously
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 approach significantly improves methane conversion and hydrogen production, with modified red mud catalysts demonstrating higher activity and durability compared to unmodified red mud, achieving sustained performance over extended periods.
Implementation Method 1
providing a methane feed with oxygen and carbon dioxide to react over the modified red mud catalyst composition at increased temperature and increased pressure to produce synthesis gas comprising H2 and CO
Implementation Method 2
Enhanced-acidity Group VIB catalyst compositions are disclosed, in some embodiments further including nickel
Data Source
AI summary
Methods for autothermal reforming over a modified red mud catalyst composition, one method including providing a methane feed with oxygen and carbon dioxide to react over the modified red mud catalyst composition at increased temperature and increased pressure to produce synthesis gas comprising H2 and CO, the composition comprising red mud material produced from an alumina extraction process from bauxite ore; nickel oxide, the nickel oxide present at between about 5 wt. % to about 40 wt. % of the modified red mud catalyst composition; and a Periodic Table Group VIB metal oxide, the Group VIB metal oxide present at between about 1 wt. % and about 30 wt. % of the modified red mud catalyst composition.