Biodiesel Sludge Converted to Hydrogen


241469637_3334f8faa3_m.jpg What to do with the byproduct of biodiesel? You know, that low-grade sludge that’s produced, molecule for molecule, alongside biodiesel. Well, scientists at the University of Leeds have turned the unwanted crude glycerol (sludge) into a high-value hydrogen rich gas. The novel process developed by Valerie Dupont and her co-investigators mixes glycerol with steam at controlled temperatures and pressures, separating the waste product into hydrogen, water and carbon dioxide, with no residues. A special absorbent material filters out the CO2, leaving a purer product.

Currently hydrogen production is expensive and unsustainable, using either increasingly scarce fossil fuels or other less efficient methods such as water electrolysis. The new process is near carbon neutral, since the CO2 generated is not derived from the use of fossil fuels.

Let’s hope the new processes emerging from a worldwide explosion of research prove green, sustainable, and economically feasible.

Julia Whitty is Mother Jones’ environmental correspondent. You can read from her new book, The Fragile Edge, and other writings, here.

THANK YOU.

We recently wrapped up the crowdfunding campaign for our ambitious Mother Jones Corruption Project, and it was a smashing success. About 10,364 readers pitched in with donations averaging $45, and together they contributed about $467,374 toward our $500,000 goal.

That's amazing. We still have donations from letters we sent in the mail coming back to us, so we're on pace to hit—if not exceed—that goal. Thank you so much. We'll keep you posted here as the project ramps up, and you can join the hundreds of readers who have alerted us to corruption to dig into.

We Recommend

Latest

Sign up for our newsletters

Subscribe and we'll send Mother Jones straight to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate

Share your feedback: We’re planning to launch a new version of the comments section. Help us test it.