Gold Catalyst Found To Turn Natural Gas Into Methanol
Natural gas is one of the greenest fossil fuels, it still emits greenhouse gases into the atmosphere when burned so the researchers devised novel ways of converting methane, which accounts for 70-90% of natural gas, into more useful products, such as a fuels and chemicals, in a simple, cost-effective and low-carbon manner.
In a study published in Nature Catalysis, the team led by Cardiff Catalysis Institute researchers has demonstrated, for the first time, the direct conversion of methane into methanol and acetic acid using a gold catalyst. Until now, this has only been achieved through indirect routes which include multiple steps that are highly energy consuming and very costly.
To achieve the creation of methanol and acetic acid the team reacted methane with oxygen in the presence of a catalyst made from gold and the zeolite ZSM-5.
By examining the catalyst using high-powered electron microscopy, it was revealed that the active catalyst did not contain gold atoms or clusters, but rather gold nanoparticles – extremely small particles between 3 to 15 nanometers in size that can exhibit significantly different physical and chemical properties to their larger material counterparts.
The production of methanol using this catalyst was expected; however, the novelty of the new method came in the production of acetic acid. Acetic acid is a common industrial chemical with large quantities used to make products such as ink for textile printing, dyes, photographic chemicals, pesticides, pharmaceuticals, rubber and plastics.
Methanol, meanwhile, is commonly used as a precursor to many other commodity chemicals, as well as a biofuel.
Despite the well-known inertness of the precious metal gold, pioneering research by scientists at the Cardiff Catalysis Institute has demonstrated that it is, in fact, an extremely efficient and reliable catalyst that can be used effectively in many important industrial processes.
Co-author of the study Professor Graham Hutchings, Regius Professor of Chemistry from the Cardiff Catalysis Institute said, “The oxidation of methane, the main component of natural gas, to selectively form oxygenated chemical intermediates using molecular oxygen has been a long-standing grand challenge in catalysis. We have successfully demonstrated this for the very first time in this study, providing an important first step towards the creation of important fuels and chemicals in a simple and cost-effective way.”
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This is quite the head turning news as gold isn’t thought of as a catalyst due to its stability. Perhaps this work will trigger more investigation and research in the hope that those catalysts with short working lifespans might be modified to last a lot longer or work more effectively.
Gold isn’t cheap, but if it proves to have longevity the cost of use might be attractive after all. Target one, platinum applications.
The post Gold Catalyst Found To Turn Natural Gas Into Methanol first appeared on New Energy and Fuel.
Source: https://newenergyandfuel.com/http:/newenergyandfuel/com/2022/02/24/gold-catalyst-found-to-turn-natural-gas-into-methanol/
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