Paebbl: Turning CO2 Emissions into Carbon-Storing Construction Material

The Challenge of Cement Production

• 🏭 Traditional cement production is a major contributor to global greenhouse gas emissions, accounting for six to eight percent.
• ⚠️ The core issue lies in limestone (calcium carbonate), which releases CO2 when heated, meaning even electrifying production won't eliminate all emissions.
• 🏗️ The construction industry is massive, producing 30 billion tons of concrete annually and requiring significant new infrastructure by 2050.

Nature's Carbon Cycle and Rock Weathering

• 🌍 Rock weathering is a natural process where rainwater dissolves CO2 from the atmosphere, converting it into stable minerals that lock carbon away for millennia.
• ⏳ This natural carbon sink is effective but extremely slow.

Paebbl's Accelerated Solution

• ⚡ Paebbl utilizes a process that mimics rock weathering but accelerates it using chemical reactors with increased pressure and temperature.
• 🧱 Their product has cementitious properties and can substitute traditional cementitious materials.
• 🧪 Unlike traditional cement, Paebbl's process uses minerals and actively adds CO2, transforming it into a solid product rather than releasing it.

Scaling and Economic Viability

• 📈 Paebbl has scaled production from kilograms to hundreds of kilograms per day and is moving towards continuous processes.
• 🏭 A demonstration plant in Rotterdam can process 900 tonnes of CO2 annually, producing 2,000-4,000 tons of material.
• 💰 The company aims for cost parity with traditional cement and supplementary materials in their first commercial plants.
• 🌐 Construction is a consistently growing industry, driven by both economic booms and government infrastructure spending, ensuring demand for materials.

The Future of Construction

• 💡 If concrete can shift from being a net emitter to a net carbon sink, it offers a significant societal solution to climate change.
• 💬 The potential exists to transform buildings from carbon sources into carbon absorbers.