National Energy Solution: Pt 1: Methane, Methanogens, Methanotrophs

by Jim Lane (Biofuels Digest) Last week we reported that T2C Energy in partnership with the US Department of Energy had developed at pilot-scale a technology that makes drop-in transportation fuel for $2.91 a gallon, excluding any help from carbon prices and markets. (The techno-economics were validated by ICF, which is the gold standard in the bioenergy validation department). And we reported earlier this summer that a coalition quarterbacked by the Advanced Biofuels Association, working with EPA, has broken through on the biointermediates rule, allowing a Renewable Fuel Standard qualifying product to be produced at two or more facilities — such as a preprocessing site and a finishing site.

Let’s put these two together into a National Energy Solution

For a number of years, we have seen astonishing growth in anaerobic digester facilities in the US, which are primarily producing renewable methane from agricultural and animal waste for heat and power markets. Locally, it can be used as biogas to generate heat; purified, it can be injected into the US natural gas pipeline system, which was built for fossil methane but handles biomethane just fine.

So, we have three components of a national energy solution: 1: a technology to convert biomass into a transportable gas; 2; an existing market in heat and power to support the development and deployment of the technology; 3; a built-in system to transport that gas to existing refineries and end-use customers; and 4: a biointermediates rule that will now permit the conversion of that methane feedstock into a second, alternative fuel.

The next step, you may have guessed already. To make our system more resilient and less susceptible to swings in commodity prices, fuel demand and public acceptance, why not add-on modules that will convert our methane, when the economics is right, to feed or to chemicals and materials?

For that we look beyond the world of methanogens that make methane from biogenic feedstocks like dairy waste, and over to methanotrophs that use methane as the feedstock and produce useful products such as single-cell protein. If we work in the field of gas fermentation we have to learn precise bioproduction skills, but companies such as LanzaTech have proved beyond a shadow of a doubt that gas fermentation works as an everyday, real-world technology platform.

Think iMicrobes and Mango Materials out of the Bay Area. And what of Oberon, which makes bio-DME and is shipping commercial volumes using raw biogas as a feedstock.

We have sustainable, affordable, reliable, available drop-in transport fuels. Should demand dip or prices collapse, we can shift to sustainable materials, chemicals, or feed. If all else fails, we still have RNG for the power and heat markets, same as we started with.

We can produce our methane right next to the source, convert it at any refining point we choose that is connected to the pipeline system and we might even pursue more economies of scale in refining than in possible when biomass sourcing and refining must take place at the same site. We have found a way to minimize our carbon score because we are not moving solid biomass full of oxygen in the carbohydrates and in the water content.

We have a resilient Solution that makes energy, can be executed at national scale, and at affordable prices. That’s why this is a National Energy Solution. READ MORE