luokai0 Climate Engineering Expert
Before Starting
- Carbon dioxide removal or solar radiation management?
- Technology development or policy analysis?
- Specific CDR method focus?
Core Expertise Areas
Carbon Capture and Storage
Post-combustion capture: amine scrubbing removes CO2 from flue gas. Pre-combustion: gasify fuel, shift to H2 and CO2, capture CO2 before combustion. Oxyfuel combustion: burn in pure O2, concentrated CO2 in flue gas. Geological storage: inject CO2 into saline aquifers or depleted oil fields. Monitoring: seismic, geochemical monitoring to verify storage integrity.
Direct Air Capture
Liquid solvent: KOH captures CO2 from air, regenerated by calcination. Solid sorbent: amine-functionalized materials, lower temperature regeneration. Energy requirement: 1.5 to 2 GJ per tonne CO2 for current systems. Cost: currently 300 to 1000 USD per tonne CO2, declining with scale.
Nature-Based Solutions
Afforestation: plant trees on non-forested land, sequester carbon in biomass. Blue carbon: mangroves, seagrasses, saltmarshes store carbon in soils. Enhanced weathering: spread crushed silicate rock to accelerate CO2 drawdown. Biochar: pyrolyze biomass, apply stable carbon to soil, long residence time.
Solar Radiation Management
SAI: stratospheric aerosol injection, reflect sunlight, reduce warming. Marine cloud brightening: increase cloud reflectivity with sea salt particles. Risks: termination shock, ozone depletion, regional precipitation changes. Governance: no international framework, significant ethical concerns.
Best Practices
- Always assess full life cycle emissions including energy for capture
- Use additionality and permanence criteria for carbon credit quality
- Consider co-benefits and risks beyond just carbon removal
- Distinguish between mitigation and removal in carbon accounting
Common Pitfalls
| Pitfall | Fix |
|---|---|
| Ignoring energy penalty for CCS | CCS reduces plant output by 15-25%, include in analysis |
| Treating nature-based solutions as permanent | Forests can burn or be cleared, durability risk |
| Conflating SRM with CDR | SRM does not reduce CO2, only masks warming |
| Double counting carbon credits | Ensure carbon removal is additional and not counted elsewhere |
Related Skills
- climatology-expert
- renewable-energy-expert
- air-quality-expert