The primary component of natural gas, methane, is itself a potent greenhouse gas. A recent study, affiliated with UNIST has unveiled a high performance catalyst for methane conversion to formaldehyde.
This breakthrough has been led by Professor Kwang-jin Ahn and his team in the School of Energy and Chemical Engineering at UNIST in collaboration with Professor Ja Hun Kwak (School of Energy and Chemical Engineering, UNIST), Professor Eun Duck Park from Ajou University, and Professor Yoon Seok Jung from Hanyang University.
In this work, the team has presented an excellent ‘methane oxidase catalyst’ consisting of nanomaterials. This material has a stable structure and high reactivity at high temperatures, increasing the efficiency of converting methane to formaldehyde more than twice as much as before.
Methane, like petroleum, can be converted into useful resources through chemical reactions. The main ingredient of shale gas, which is attracting attention in the US in recent years, is methane, and the technology to make high value-added resources with this material is also recognized as important. The problem is that the chemical structure of methane is so stable that it does not easily react to other substances. So far, methane has been used primarily as fuel for heating and transportation.
A high temperature above 600 ° C is required to effect a reaction that changes the chemical structure of methane. Therefore, a catalyst having a stable structure and maintaining reactivity in this environment is required. Previously, vanadium oxide (V2O2) and molybdenum oxide (MoO3) were known to be the best catalysts. When these catalysts were used, the formaldehyde conversion of methane was less than 10%.
Professor Ahn made a catalyst that could convert methane to formaldehyde using nanomaterials. Formaldehyde is a useful resource widely used as a raw material for bactericides, preservatives, functional polymers and the like.
The catalyst has a core-shell structure consisting of vanadium oxide nanoparticles surrounded by a thin aluminum film, with the aluminum shell surrounding the vanadium oxide particles. The shell protects the grain and keeps the catalyst stable and maintains stability and reactivity even at high temperatures.
In fact, when the catalytic reaction was tested with this material, vanadium oxide nanoparticles without aluminum shells had a structural loss at 600 ° C. and lost catalytic activity. However, nanoparticles made from core-shell structures remained stable even at high temperatures. As a result, the efficiency of converting methane to formaldehyde increased by more than 22%. It turned methane into a useful resource with more than twice the efficiency.
“The catalytic vanadium oxide nanoparticles are surrounded by a thin aluminum film, which effectively prevents the agglomeration and structural deformation of the internal particles,” says Euiseob Yang from the Department of Chemical Engineering at UNIST partook as the first author of this study. “Through the new structure of covering the atomic layer with nanoparticles, Thermal stability and reactivity at the same time.”
This research is particularly noteworthy in terms of improvement in the catalyst field, which has not made great progress in 30 years. The catalytic technology to produce formaldehyde in methane has not made much progress since it was patented in the US in 1987.
“The high-efficiency catalyst technology has been developed beyond the limits of the technology that has remained as a long-lasting technology,” says Professor Ahn. “The value is high as a next-generation energy technology utilizing abundant natural resources.”
He adds, “We plan to expand the catalyst manufacturing technology and catalyst process process so that we can expand our laboratory-level achievements industrially. The catalyst technology has a considerable effect on the chemical industry and contributes to the national chemical industry. I want to develop a practical technology that can do it.”
The Latest on: Waste methane
via Google News
The Latest on: Waste methane
- Methane Rule Rollback: A One-Two Punch Against Climate And Big Industryon September 6, 2019 at 7:38 am
Why do we care about methane leaks? If the problem were simply that we were losing valuable Btu’s that we could have used to dry our laundry, then perhaps we need not worry: industry on its own would ...
- Pig farm develops ways to turn waste into fertilizers and poweron September 5, 2019 at 6:30 pm
At Henan Yifa Animal Husbandry, a pilot of the cooperation project, recycling systems were built to turn pig waste into methane, which is then turned into electricity. Previously, the company's 60,000 ...
- Methane emissions continue to dropon September 5, 2019 at 4:00 pm
In the oil and natural gas industry, you don't get very far without making use of valuable resources rather than treating them as waste. So, it probably shouldn't surprise you that methane emissions ...
- Everything you should know about methane as regulations loosenon September 5, 2019 at 12:29 pm
The bulk of human-caused methane, about 56 percent, comes from livestock, rice cultivation, and waste. In livestock production, animals' manure and cow burps release methane into the atmosphere. Rice ...
- Methane emissions, pollution hit record in Permian: studyon September 4, 2019 at 4:23 pm
The report estimates the volumes of methane from natural gas burned off or vented into the atmosphere averaged 663 million cubic feet per day in the second quarter, more than triple the amount of ...
- Permian methane emissions back on the rise after small dipon September 4, 2019 at 6:34 am
The report estimates that the volumes of methane from natural gas burned off or vented into the atmosphere averaged of 663 million cubic feet per day in the second quarter, which is more than triple ...
- Food Waste Is a Huge Environmental Problem. Here's 5 Ways to Reduce Yourson September 3, 2019 at 8:26 am
Cutting back on food waste could help the environment in a few ... But as food rots in landfills, it also produces methane, one of the greenhouse gases that contribute to climate change—so ...
- Is France’s groundbreaking food-waste law working?on August 31, 2019 at 2:05 pm
This is obviously not only a massive waste of food, it's also a big contributor to global warming because as it decomposes in landfills it releases methane. In fact according to the UN Food and ...
- The EPA Says Methane Rules Are Bad for Industry—It's Wrongon August 30, 2019 at 9:16 am
Wetlands, bogs, and swamps also release methane to the atmosphere as part of a natural carbon cycle. Decomposing waste at the bottom of landfills creates methane, as do cows. Experts say each ...
- What Is Methane, Anyway?on August 29, 2019 at 2:54 pm
basically—and 16 percent of global methane emissions are generated by organic waste decomposing in landfills. Methane can be also be released through the storage and use of manure for fuel (9 percent) ...
via Bing News