
Chemical Recycling Mini-Landscape: Cellulose
This document is a cellulose-specific version of the larger chemical recycling landscape, and is the slideset that was used in the recorded lecture on cellulose recycling. It highlights the challenges, limitations, and opportunities for scaling chemical recycling technologies. The mini-landscape contrasts mechanical and chemical recycling, explores key innovations, and assesses the impact of recycling processes on sustainability and circularity for cellulose recycling.
Last updated: 15/08/2023
Introduction & Key Terms
Textile Waste Crisis: A significant portion of textile waste is incinerated or sent to landfill due to the lack of scalable recycling solutions.
Mechanical vs. Chemical Recycling:
- Mechanical Recycling involves physical processes such as shredding, producing lower-quality fibres with limited recyclability.
- Chemical Recycling breaks down materials into monomers or polymers, maintaining fibre quality and enabling greater circularity.
Cellulosic Fibre Recycling:
- Cotton, linen, hemp, and bamboo are converted into Man-Made Cellulosic Fibres (MMCFs) through chemical processes.
- Recycling degrades cellulose over time, meaning MMCFs cannot be recycled indefinitely.
- Most innovators focus on pre-consumer waste, as post-consumer feedstock often contains contaminants that complicate processing.
Innovation Opportunities:
- Improved sorting and pre-processing to handle blended and coloured textiles.
- Development of energy-efficient and less chemically intensive recycling processes.
- Expansion of infrastructure to process post-consumer waste at scale
Contents
- Introduction: The Need for Chemical Recycling
- Comparison: Mechanical vs. Chemical Recycling
- Chemical Recycling Categories
- MMCF Recycling
- Polyester Recycling
- Blended Textile Separation
- Challenges in Chemical Recycling of Cellulose
- Innovation and Market Opportunities
- Pre-processing and Sorting Improvements
- Chemical Efficiency in Pulping and Fibre Spinning
- Scaling Post-Consumer Waste Processing
- Recycling Processes for Cellulosic Fibres
- Viscose vs. Lyocell Fibre Spinning
- Two-Step Cellulose Recycling Process
- Industry Players and Value Chain Analysis
- Future Outlook and Questions for Innovation Scouting