MetGen, Sweetwater Energy say \u201cthere\u2019s gold in them thar side-streams\u201d<\/p>\n
For all of your questions about the advanced bioeconomy there\u2019s just the one answer and that is \u201clignin\u201d.<\/p>\n
Why don\u2019t we see more biobased chemical plants built these days? Lignin. Why do people shy away from hardwoods as a raw material even though it\u2019s sustainable, available, reliable and affordable? Lignin. What raw material have more people tried to make money out of and failed than anything else? Lignin. If the bioeconomy really catches fire, it\u2019ll be because of a breakthrough in what? Lignin.
\nThe Yosemite Sam of materials<\/p>\n
It\u2019s the meanest, toughest hombre of a material that ever came out of the ground, it\u2019s the Yosemite Sam of the advanced bioeconomy \u2014 unreliable, inconsistent, grumpy, fiery, strident, incapable of improvement, impossible to do anything with, and impossible to ignore. So people just burn it. It smells faintly like vanilla and almonds, but it ought to smell like $20 bills going up in smoke.
\n\u201cYa no good, bush-whackin\u2019 lignin, ya valueless varmint!<\/p>\n
But trapped deep inside lignin are some aromatic molecules that are easily worth $1500-$2000 per tonne \u2014 more than fuels, more than most bulk chemicals. More than some people I know. And you can find them in wood, which sells for far less than $100 per ton as a raw material. Yet, if you walk around the biomass industry, you\u2019ll find pellet plant after pellet plant \u2014 chopping up wood to sell to Scandinavia as a source of affordable, renewable heat and power. Worth perhaps $80 per ton in heat value.<\/p>\n
What\u2019s the problem? The answer to all your questions is lignin.<\/p>\n
But there\u2019s been more work on lignin of late than ever before. NREL has a lignin valorization project, focused on fractionating down into parts, and looking at multiple pathways to build those parts back up into molecules of value. The key? You have to get down to a small enough weight and size, and the more consistency the better. That\u2019s where you unlock the true value<\/p>\n
Good news, lignin fanbase. Sweetwater Energy has finalized a licensing and joint technology development agreement with the Finnish company MetGen Oy for MetGen\u2019s LIGNO technology platform which facilitates the enzymatic break down of Sweetwater\u2019s ultra-clean lignin into its fundamental component parts. This will allow the development of a full range of high value lignin-based products.<\/p>\n
LIGNO\u2019s secret? It\u2019s MetGen\u2019s enzyme set \u2014 in this case, bred for kraft pulp applications and thereby these alkaliphilic enzymes can effectively function at a pH up to 11, where lignin becomes fully soluble, with an added benefit of outstanding thermo-tolerance \u2014 think up to 80- degrees.
\n\u201cSay yer prayers, lignin, ya long-chain\u2019d galoot!\u201d<\/p>\n
Sweetwater and MetGen will carry out the commercialization of both technology platforms at Sweetwater\u2019s small commercial facility in Rochester NY and will roll the technology out to facilities world-wide.
\n\u201cI smells sugars a-cookin\u2019 \u2026 and where there\u2019s sugars, there\u2019s value\u201d: The Sweetwater backstory<\/p>\n
From the outside, it might appear that Sweetwater has bounced around a bit, seeking the right technology fit. But the business vision has been consistent, precisely because it is a business vision and not a scientific odyssey to develop a solution and then find a problem to fix.<\/p>\n
The goal has been realizing value out of, initially, hardwoods. For cellulosic anything, the main cost is in the feedstock, and if you don\u2019t extract the full value, you\u2019ll find it impossible to compete with corn \u2014 much less petroleum. Corn doesn\u2019t leave anything on the table.<\/p>\n
So it comes down to lignin. Because if you are getting 60% yield on the sugars and getting $80\/ton of value on the lignin, you can\u2019t make a viable business. In hardwoods or anything else.<\/p>\n
Pretreatment has been the bear for Sweetwater \u2014 they\u2019ve worked with four different technologies, painfully and slowly, and finally they came across Sunburst, which they developed as a patented process that converts over 94% of total sugars to monomeric sugars, while producing few downstream inhibitors. Most recently, Sweetwater Energy achieved what it described as \u201cworld-record results\u201d, more than 91 gallons of industrial ethanol per dry metric tonne of biomass.<\/p>\n
As Sweetwater\u2019s Scott Tudman explained to The Digest, \u201cpretreatment for us is the critical step, we were searching, we wanted to get 90% of the sugar or more, and then a clean lignin residual you could monetize. Sunburst gets us there, and in our model the lignin now yields more than what we get from the sugar. We\u2019re almost on the verge of being a lignin company, because this collaboration with MetGen allows us to fully unlock that lignin value, and with that high value we can bring down the cost of cellulosic sugars, and compete with cane and corn.\u201d<\/p>\n
Sweetwater recently upgraded its demo facility to process biomass at a small commercial level\u2013 up to three tons of biomass per day, using a state-of-the art extrusion technology at its core. Sweetwater is achieving over 97% hemicellulose conversion to monomeric sugars in less than 10 seconds, and over 93% conversion of cellulose to monomeric glucose through enzymatic hydrolysis, fully converting 94% of total theoretical sugars in the original biomass to monomers.
\n\u201cSolubilize faster, you lily-livered lignin \u2026 Solubilize faster or I\u2019ll blast your head off!\u201d: The MetGen gambit<\/p>\n
\u201cEnzymes have to be about more than hydrolysis,\u201d MetGen CTO Matti Heikkil\u00e4 told The Digest. \u201cGiven the price of wood raw materials, you cannot afford to not use the 30% lignin content,. You have to valorize. But it\u2019s a very complex molecule set, with lot of rings attached and no particular form, and burning is an easy way out.\u201d<\/p>\n
The problem, as MetGen and Sweetwater explain, is in the solubility. If you can solubilize lignin, you can get it down to to well below 50 kilodeltons, and then you can start to put it in adhesives and could replace formaldehyde.<\/p>\n
\u201cDown in that .3, .5 , 7 kilodeltons range,\u2019 said Heikkil\u00e4, \u201cyou are almost at the primary precursors, down to 2-4 ring complexes and now you can do quite specific applications \u2014 foams, composite PVA packaging.\u201d Caution here. MetGen isn\u2019t developing a drop-in form of biobased PVA. Rather, this is about making materials that do the same job \u2014 that command values in the range of $1500-$2000 per tonne.<\/p>\n
\u201cI paid my four bits to see the high divin\u2019 act \u2026 and I\u2019m-a gonna see the high diving act!: MetGen and Sweetwater, together<\/p>\n
So, this partnership is about matching Sweetwater\u2019s UltraClean lignin to MetGen\u2019s LIGNO technology \u2014 but is this a tactical partnership of two companies that think alike about capturing value and like to collaborate \u2014 or are there technical and value reasons that these two techs go together well?<\/p>\n
Think, \u201ca bit of both\u201d.<\/p>\n
Yes, it\u2019s a long-standing relationship and they share a vision on the importance of lignin valorization. And yes, MetGen\u2019s enzymes are robust and will work with multiple raw materials and processes. So, why Sweetwater?<\/p>\n
For MetGen, it comes down to yield. You see, lignin\u2019s always been the stepchild in the value chain and everyone has chased and teased out all the sugars they can find, and then all that residue from sugar extraction gets thrown out with the lignin. So, the lignin side-stream is filled with things that aren\u2019t lignin, including residual carbohydrates. It doesn\u2019t kill the MetGen enzyme, but you impact yield. The cleaner and purer the lignin, the more value you get. More sugar in the first pass, purer lignin in the side-stream. Whether this is about plastic foams or adhesives and resins.<\/p>\n
For Sweetwater, it\u2019s about that valorization drive. Their UltraClean lignin is good as filler, but not yet consistent enough and at too wide a particle size to be exciting to the likes of Dow DuPont as a pathway to new chemistries \u2014 where the value is. So, perfect together in many ways.
\nBlast my scuppers, why isn\u2019t anyone else doing this?<\/p>\n
It\u2019s as if everyone gave up.<\/p>\n
\u201cThere\u2019s been surprisingly little of high quality material in relevant quantities available for application work. =\u201d said Heikkil\u00e4. \u201cWe\u2019re pioneering and have a good head start.\u201d
\nSo, ya lignin-lovin\u2019 buck-toothed barnacle, what\u2019s next?<\/p>\n
Look for Sweetwater to wrap up a Series B funding for the company and the financing for it\u2019s first commercial plant in Minnesota as soon as this fall.<\/p>\n
Sweetwater CEO Arunas Chesonis told The Digest, \u201cPlant 1 is for industrial alcohol that\u2019s GMO free \u2014 we get over a half dollar premium for that, it\u2019s a simple product to make, and it\u2019s a small market well suited to a small commercial plant where we can produce 4 million gallons and prove our pretreatment process works. For now we\u2019ll sell the lignin into the activated carbon market, and 6000 tons per year with that, and we have two sets of offtakes for the plant\u2019s production.<\/p>\n
How is the company getting through the problem of technology risk? They\u2019re taking the insurance route on that and expect to have that wrapped up in the next 90 days, also.<\/p>\n
Feedstock, not yet signed, but the company said that the Minnesota needs a relatively nominal 50,000 tonnes for the small commercial plant \u2014 easy for the market to handle. It\u2019s a $100 million project and will require half equity, half debt.<\/p>\n
But then, there\u2019s Europe, too. The Horizon 2020 program has big budgets snd big ambitions and for a big flagship EU project, those clean Sweetwater sugars and their high yields will come in handy to make the numbers work, so we wouldn\u2019t drop dead of surprise if the two partners become part of a big Horizons 2020 application.<\/p>\n
The Bottom Line, ya\u2019 muley-headed maverick<\/p>\n
As we said, no matter your question, lignin is the answer. Including to a question like \u201ca breakthrough in what area will transform cellulosics from a sideshow to the main show?\u201d So, it\u2019s the right time and the right focus \u2014 the partners believe they have it nailed, and we won\u2019t have long to wait to see whether and to what extent this will transform markets.<\/p>\n","protected":false},"excerpt":{"rendered":"
MetGen, Sweetwater Energy say \u201cthere\u2019s gold in them thar side-streams\u201d For all of your questions about the advanced bioeconomy there\u2019s just the one answer and that is \u201clignin\u201d. Why don\u2019t we see more biobased chemical plants built these days? Lignin. Why do people shy away from hardwoods as a raw material even though it\u2019s sustainable, […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","nova_meta_subtitle":"","footnotes":""},"categories":[5572],"tags":[11828,12529],"supplier":[8390,337,4464,4114],"class_list":["post-45291","post","type-post","status-publish","format-standard","hentry","category-bio-based","tag-lignin","tag-technology","supplier-biofuels-digest","supplier-dupont","supplier-metgen","supplier-sweetwater-energy"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/45291","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=45291"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/45291\/revisions"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=45291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=45291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=45291"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=45291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}