Shell's clean energy ambitions in Brazil are in jeopardy as Raízen, its joint venture with Cosan, faces a deepening debt crisis. The world's largest sugarcane ethanol producer is struggling with R$55bn in debt, poor harvests, and high interest rates, causing its share price to plummet.

Despite intense negotiations over a rescue package, a capital injection has proven elusive. Cosan recently withdrew from a proposed R$4.5bn lifeline after Shell opposed splitting the company. The impasse has raised concerns about the future of one of Shell's key clean energy investments.

Raízen's troubles have caught the attention of Brazilian authorities, with President Lula da Silva summoning stakeholders to discuss preventing bankruptcy. The company posted a R$15.6bn loss in Q3 and is seeking creditor approval for an out-of-court restructuring. While the crisis poses challenges for Shell's Brazil operations, a potential upside exists: high oil prices could make ethanol more competitive against petrol if the company survives this turbulent period.