Biomass Co-feed for Catalyst Makeup in Coal Gasification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing catalytic gasification processes for converting carbonaceous feedstocks into gaseous products require external catalysts, increasing costs and reducing the overall utilization of feedstocks, as they do not effectively utilize intrinsic catalytic activity within the feedstocks.
Innovation Solution
A continuous process that recovers alkali metal compounds from char produced during gasification and reuses them as catalysts, supplemented by biomass as a source of alkali metal to maintain a steady-state operational molar ratio, thereby reducing raw material costs and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external catalysts are provided separately from feedstocks, then catalytic activity for methane formation is improved, but process cost increases and feedstock utilization decreases
Solution Approach 1:
The feedstock serves its own catalytic needs by utilizing intrinsic catalysts already present within the carbonaceous material itself, eliminating the need for separate external catalyst addition. This self-service approach reduces process cost while maintaining catalytic activity for methane formation.
Solution Approach 2:
The feedstock performs multiple functions: it serves as both the carbon source for gasification and as the source of catalytic activity through its intrinsic catalysts. This multi-functionality increases feedstock utilization efficiency while avoiding the need for separate catalyst procurement and handling.
2Reliability
If external catalysts are provided separately from feedstocks, then catalytic activity for methane formation is improved, but overall feedstock utilization decreases
Solution Approach 1:
The feedstock utilizes its own intrinsic catalysts to perform the gasification reaction, meaning the catalytic function is integrated within the feedstock itself. This eliminates the need for separate catalyst material that would not contribute to feedstock utilization metrics.
Solution Approach 2:
The catalytic function is merged with the feedstock material by utilizing intrinsic catalysts that are already part of the carbonaceous feedstock composition. This combining of feedstock and catalyst functions maximizes the utilization of the feedstock material.
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 process enhances the conversion efficiency of carbonaceous feedstocks into gaseous products like methane and other hydrocarbons, reducing raw material costs and environmental impact by utilizing intrinsic catalysts and minimizing catalyst loss.
Implementation Method 1
The catalytic gasification of such materials to produce methane and other value-added gases
Implementation Method 2
reacting the carbonaceous feedstock in a gasification reactor in the presence of steam under suitable temperature and pressure to form gaseous products
Data Source
AI summary
Continuous processes are provided for converting a carbonaceous feedstock comprising biomass containing alkali metal, non-biomass components, and at least one gasification catalyst including an alkali metal recovered from solid char, into a plurality of gaseous products including methane and at least one or more of hydrogen, carbon monoxide, and other higher hydrocarbons.