Technology

Synthetic Biologists Develop Tool to Observe Bacterial Signal Processing in Real Time
Technology

Synthetic Biologists Develop Tool to Observe Bacterial Signal Processing in Real Time

A team of synthetic biologists at Rice University claim they have developed the first method for observing the real-time activity of some signal-processing circuits in bacteria, including deadly pathogens that use the circuits to increase their virulence as well as…

Cornea Implants Bioengineered from Pig’s Skin Used to Restore Vision in Humans
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Cornea Implants Bioengineered from Pig’s Skin Used to Restore Vision in Humans

Approximately 12.7 million people around the world are blind due to corneal stromal disease. Although a transplanted cornea from a human donor is the only way of regaining vision, only 1 in 70 patients receives a cornea transplant. Now, researchers…

Vegan Biomaterials Could Replace Chemicals In Crop Management
Technology

Vegan Biomaterials Could Replace Chemicals In Crop Management

Recent research shows that new vegan-based biomaterials could be used instead of chemical products and pesticides to help farmers manage their crops in a more eco-friendly and sustainable way.

Christopher Barton began his career in the aerospace industry, but now sees an opportunity to use carbon dioxide to create useful materials like silica, in a way that is cheaper and with a lower carbon footprint than current methods. “The logic was that CO2 is the most abundant, low cost potential feedstock in the world, and the business model should be profitable without relying on a carbon tax,” Barton says. He set up Barton Blakeley at Rothamsted Research’s site in Harpenden, UK, where an anaerobic digester nearby provides a good source of CO2, and Rothamsted could provide analytical support and other agricultural waste materials as potential feedstocks. The CO2 is blended into a fuel mixture, which is fed into the company’s Hyper Xi process reactor. There are multiple reactions occurring in the reactor simultaneously, he explains. “That gives us the ability to break up the carbon dioxide.” The oxygen from the CO2 combines with a metal to form various metal oxide powders, depending on the other fuels that are fed into the reactor. “The majority of the mass from the CO2 – the oxygen – is stored within the powder product.” The carbon can be used to functionalise the end product, distributed into other reaction products, or can be recycled to regenerate more of the fuel mixture, he says. Initially, the company has focused on silica as a cost-effective product with high demand. By tuning the reactor conditions, a variety of different grades and forms of silica can be achieved. That includes a hydrophobic fumed silica covered in methyl or short alkyl groups – derived in part from the carbon from the CO2 in the fuel mixture. This kind of hydrophobic silica has a well-established market, but it is expensive and energy-intensive to make. “We skip out quite a few of the energy-intensive and siloxane-based steps,” Barton says. The overall carbon footprint of silica from the Hyper Xi process is significantly lower than current commercial production methods used by the global silicones industry. “Fumed silica has a pretty huge carbon footprint – it’s about 30kg of CO2 equivalent per kilogram of material produced,” says Barton. “If we buy in the fuel materials for our process – which is completely different and involves very different chemistry – you can quite comfortable halve that.” Barton believes that accounting for recycling of the fuels and sourcing some of the inputs from waste materials like rice husk ash, or fabrication waste from the aerospace industry, could eventually bring that figure closer to a 90% reduction in carbon footprint. The company has now built a larger, pilot-scale plant, with an aim to refine the process and prove its business model works. “It’s capable of consuming about 6 tonnes-worth of CO2 per year, and we’re expecting that to make about 3–4 tonnes of silica powder,” explains Barton. “We have the capability to have a kilotonne scale plant either in construction or completed within the next five years. Our plans are to go as high scale as quickly as possible. Mostly because, while a kilotonne plant is great, until it’s on a megatonne scale, it’s not really doing anything to help fix the planet.”
Technology

Rocket Power for CO2 Conversion

Christopher Barton began his career in the aerospace industry, but now sees an opportunity to use carbon dioxide to create useful materials like silica, in a way that is cheaper and with a lower carbon footprint than current methods. 

Gel Developed from Spider Silk Proteins for Biomedical Applications
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Gel Developed from Spider Silk Proteins for Biomedical Applications

A team of scientists from the Karolinska Institute in Sweden and the Swedish University of Agricultural Sciences reported that spider silk proteins can be incorporated into biologically active proteins and be converted into a gel at body temperature. The study…

Scientists Use Melamin to Capture CO2
Technology

Scientists Use Melamin to Capture CO2

A team of scientists from the University of California, Berkeley, Stanford and University of Texas have created a cheap, easy and energy-efficient way to capture carbon dioxide from smokestacks, using an inexpensive polymer called melamine.