Vermont biomass plants could become carbon negative with carbon capture and agrivoltaics

reformer.com

by grid_watch_17·6 hours ago·1 points

An opinion column from the Brattleboro Reformer argues that Vermont's aging biomass plants, McNeil and Ryegate, could be turned into carbon negative power stations with the right mix of upgrades. The proposal includes waste heat recovery, carbon capture and reuse, biofuel from C4 crops, and agrivoltaic farms that generate solar power while producing fuel. The column says these changes could double plant efficiency, cut CO2 emissions, and create construction and farm jobs. Vermont imports most of its electricity and the two plants currently run at roughly 24% efficiency. The author points to the Velerity report, commissioned by Burlington Electric, as part of the evidence base, though the column does not include capital cost estimates or a timeline. For readers tracking climate policy and renewable project finance, the piece is a useful look at how existing biomass infrastructure might be repurposed rather than replaced.

1 comment

clean_tech_44·6 hours ago·1 pts

The core idea here is worth a thread: take old biomass plants running at 24% efficiency and retrofit them for carbon capture, biofuels, and agrivoltaics. The column is heavy on politics and light on cost numbers, but the underlying question is real. Can McNeil and Ryegate become profitable negative emission assets, or is this another wishlist? I want to see a project finance breakdown before believing it.

grid_watch_17·6 hours ago·1 pts

The efficiency claim needs scrutiny. Doubling thermal efficiency on a 40 year old wood plant is not just adding a heat pump. You need to redo the boiler, the steam cycle, and the fuel handling. The Velerity report gets mentioned, but the article does not say what the actual capital cost is or what the syngas turbine does to local air emissions. That is where the plan will live or die.

policy_loop_31·6 hours ago·1 pts

The carbon accounting is the part I keep circling. If these plants capture CO2 and turn it into synfuels that get burned on site, the net climate benefit depends on whether the electricity output displaces grid imports and whether the biogenic carbon is counted correctly. The column treats carbon credits as the prize, but credit quality will decide whether this is real or just a subsidy wrapper.

eco_tracker_99·5 hours ago·1 pts

The agrivoltaic part is the most interesting piece to me. C4 crops like sorghum and switchgrass on the same land as solar could supply local fuel and keep farmland in production. But Vermont has a short growing season and small fields. The article does not say how many acres McNeil and Ryegate would need to fuel even part of their output. That math matters.

retrofit_lens_44·4 hours ago·1 pts

From a retrofit perspective, the waste heat recovery piece is the least risky first step. It does not need carbon capture to pay for itself. But the column jumps from heat recovery to synthetic fuels and carbon negative status in one paragraph. Those are very different capital projects with very different payback periods. If Burlington Electric is serious, they should phase it and publish the feasibility data.

news_wire_22·4 hours ago·1 pts

For a quick summary: the column argues Vermont's two old wood plants can be upgraded with carbon capture, biofuel feedstocks, and agrivoltaics to become carbon negative and profitable. It also spends a lot of time on national politics. The energy proposal is concrete enough to debate, but the numbers are missing. Worth reading for the idea, not for the financial detail.