InEnTec PEM — Eliminated

Status: Eliminated

What It Is

InEnTec's Plasma Enhanced Melter (PEM) is a plasma gasification system that converts waste into syngas and hydrogen while vitrifying inorganic residue into a marketable glass product (Synglass). Founded as an MIT Plasma Science & Fusion Center spinoff (1995), InEnTec has deployed 13 systems worldwide and operates the Columbia Ridge facility in Oregon producing 1,500 kg H₂/day.

On paper, the PEM looked attractive: it produces hydrogen, generates syngas for electricity, and creates a saleable glass byproduct. It was the other serious contender alongside PyroGenesis PRRS.

Why It Was Eliminated

1. No marine experience whatsoever — InEnTec has never built, tested, or operated any system at sea. Zero marine engineering capability. 2. Refractory-lined chamber — the #1 failure mode in plasma gasification at scale (see AlterNRG, Europlasma, Plasco — all failed due to refractory degradation). Ship vibration and thermal cycling would accelerate this. 3. Molten glass bath — PEM maintains a pool of molten glass at 1,200–1,400°C. On a moving ship, this liquid would slosh, potentially contacting electrodes, breaching containment, or causing arc instability. This is a fundamental physics problem, not an engineering problem. 4. SeaChange partnership stalled — the one concept that proposed putting PEM on a ship (SeaChange) has been dormant since 2020. No progress. 5. Tiny company — 29 employees, no manufacturing capability for marine-grade systems. 6. Two US plants closed — due to undisclosed technical issues.

Under What Conditions It Could Be Revisited

Essentially never for The Claw's marine application. InEnTec would need to:

• Develop a refractory-free design (contradicts their core architecture)
• Build marine-grade systems (requires years of development)
• Test under ship motion conditions (unprecedented for them)

Key Research

• InEnTec Standalone Deep Dive — full company and technology profile
• Processing Technology Selection — the decision document
• PRRS Deep Dive — the technology that was chosen instead