Tuesday, October 15, 2019

Here, we pump ocean water through the co2 extracotrs


Of the three places where carbon is stored—atmosphere, oceans, and land biosphere—approximately 93 percent of the CO2is found in the oceans.

Read more: http://www.waterencyclopedia.com/Bi-Ca/Carbon-Dioxide-in-the-Ocean-and-Atmosphere.html#ixzz62Sjz9Buh


We do this as part of desalinization, a two process, extract water and co2.  Heat evaporate the water, obtain gaseous CO2 and H2O. Let the CO2 be held in a metal organic framework. The whole process fed by solar electric.  The MOF tranferred to another process that makes alcohol or lipids from the CO2.

It is a energy storage device with clean water by product, runs on surplus solar electric, generate stable fluid or solid carbon fuel storage.  I guess the immediate output is a flaky crystal of organic compound connecting metal atoms in a lattice infused with carbon.  Sort of unstable, but can be transferred conveniently to a further energy intensive process.

A kind of annealing process on the lattice:
Now, scientists from Agrawal's lab have greatly improved the gas separation by making the MOF lattice structure rigid. They did this by using a novel "post-synthetic rapid heat treatment" method, which basically involved baking a popular MOF called ZIF-8 (zeolitic imidazolate framework 8) at 360°C for a few seconds.The method drastically improved ZIF-8's gas-separation performance -- specifically in 'carbon capture', a process that captures carbon dioxide emissions produced from the use of fossil fuels, preventing it from entering the atmosphere. "For the first time, we have achieved commercially attractive dioxide sieving performance a MOF membrane," says Agrawal.The scientists attribute the improvement to a shrinkage of the lattice parameters which makes the chemical bonds of MOF more rigid. The essential chemical composition, bonding environment, and crystallinity of the material was unaffected by the new procedure."Rapid heat treatment is an easy and versatile technique that can vastly improve the gas-separation performance of the MOF membranes," says Agrawal. "By making the lattice rigid, we can efficiently carry out a number of separations."
One has to boil the ocean water, one way or the other, to extract the pure gases for filtering.  The result is a lattice of rigid salt crystal with trapped CO2.  We end up with a huge accumulation of filters, filled with carbon and we have to process it further. Something like the plastic problem, but the energy input is much smaller, and extracted from the ocean. It is easier to recyle the carbon in these 'porous rocks'., but we need a use for it, like feed stock for bio fuel or carbon brick or plastic.

We now have confidence that we can concentrate environmental CO2 in one spot and process it further. That was the big if, in terms of acreage, and that was why I was interested in ocean farming, to reduce acreage for energy.  This concept proves a big bottle neck is gone, having complex equipment in the field is not needed when we can ship the extracted CO2 to a processing plant.

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