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Companies Partner to Advance Metal-Bath Gasification Technique for Coal-to-Liquids

22 April 2006

Hydromax1
Depiction of the HydroMax process.

Diversified Energy Corporation and Alchemix Corporation are working together to accelerate the development of Alchemix’ HydroMax process, a distinct approach to gasification for hydrogen production or the production of a syngas for Fischer-Tropsch conversion into liquid fuels.

Although HydroMax can process a variety of hydrocarbon feedstocks, including biomass waste, sludge, and old tires, the partnership is focusing on the development of coal-to-liquids processing, with Alchemix providing the gasification front-end to the Fischer-Tropsch process.

Following a detailed analysis of the current US energy situation, worldwide energy demand, limited oil and natural gas supplies and an assessment of all potential energy alternatives, we concluded that gasification must be an element of the country’s energy portfolio.

Transportation fuels, which account for nearly all petroleum imports, will experience severe price increases as a result of decreasing oil supply and increasing worldwide demand. One HydroMax plant can produce 242 Million gallons of conventional transportation fuel per year, enough to power 240,000 automobiles, and we are convinced that this technology will have a major energy and economic impact.

—W. David Thompson, Diversified CEO

The United States has a 275-year supply of coal and there is more energy value in coal under the state of Illinois alone than in all of Saudi Arabia. HydroMax allows us to put the US on the path to energy independence. Doubling our current coal production would provide us with enough energy to replace all imported oil.

—Robert Horton, Alchemix Chairman

Under terms of the agreement, Diversified Energy will invest $5 Million in Alchemix in exchange for stock, a technology license, and a management/development contract for the HydroMax demonstration program. The two companies are currently pursuing both government and public/private equity sources to complete funding of a pilot-plant demonstration program. Major industrial and utility strategic partners are also being sought to support technology and commercial plant development.

Alchemix designed the HydroMax process to be lower in cost than more conventional gasifications technologies. The company asserts that HydroMax could reduce gasification capital costs by a 50%, and undercut the production economics of conventional steam methane reforming (SMR) or the gasification of petroleum coke by a factor of ten. On the other hand, the process throws off more carbon dioxide—65% more when compared to Steam Methane Reforming.

(Alchemix is quick to point out that when biomass, sewage sludge or municipal waste is used as the carbon source, the process is CO2 neutral since all inputs are renewable.)

The hydrogen production process. For hydrogen production, HydroMax uses a two-step process that combines two conventional industrial process technologies in a single reactor vessel.

Alchemix2_1
The basic HydroMax hydrogen production cycle. Click to enlarge.

The first stage uses steam in contact with molten iron to form iron oxide and release hydrogen. The hydrogen is not commingled with carbon monoxide or other gases—as a result, separation costs are eliminated.

In the second stage, carbon is added to reduce the iron oxide back to pure metal—a typical metal smelting method. The inputs are steam, oxygen and carbon; the outputs are hydrogen, steam, carbon dioxide, and co-generated electricity.

Iron is not consumed in the process, and remains molten whether in oxide or metal form. The iron acts as a carrier for the oxygen from one part of the process to the other. After some experimentation, Alchemix selected a mixture of iron and tin. Iron strongly attracts the oxygen in steam to form iron oxide. The tin does not oxidize but allows operation at lower temperatures and helps to remove sulfur at low cost.

Both production and reduction process steps occur in the same reactor at the same temperature (1,250º C), eliminating the need to move, cool or heat the metal bath. Alchemix worked with Rio Tinto and HIsmelt to adapt a smelting reactor to be its HydroMax vessel.

A HydroMax production plant will require two or more reactors operating in tandem to produce hydrogen continuously—i.e., when the first reactor is in the first hydrogen production stage, the second reactor will be in the second iron oxide reduction stage.

Alchemix3
The tailored syngas production cycle. Click to enlarge.

The syngas production process. The Fischer-Tropsch process requires carbon as well as hydrogen in the syngas used as an input. To tailor HydroMax for syngas production requires the injection of a hydrocarbon together with steam in the first stage.

By measuring and controlling the amount of steam and hydrocarbon with on-line analyzers and controllers, a tailored syngas can be produced, and then routed to the Fischer-Tropsch reactor.

Carbon dioxide and emissions. On a total output basis, Alchemix calculates that HydroMax emits 16.3 pounds of CO2 per pound of hydrogen produced, while Steam Methane Reforming emits 9.9 pounds of CO2 per pound of hydrogen.

In the basic hydrogen production process, however, the hydrogen and carbon dioxide streams are never co-mingled, allowing a HydroMax plant to capture CO2 at a cost that is an order of magnitude lower than that associated with carbon capture for alternate methods of production, according to the company.

As to other emissions and residues:

  • Particulates in the gas stream exiting the reactor are captured in a baghouse.

  • Sulfur dioxides in the exhaust gas stream are removed in a state-of-the-art scrubber

  • Mercury is removed with activated carbon.

  • Ash-forming minerals associated with the carbon source are dissolved into the slag layer within the HydroMax reactor.

  • The slag is tapped periodically and quenched to become a pozzolanic material, which can be used as a replacement for Portland cement.

Alchemix began working on the HydroMax technology in 2000. Since that time, Alchemix Corporation has built several small pilot systems and developed its Hydromax reactor. It has yet to run an integrated pilot plant on a sustained basis to confirm current design, operating assumptions and economics prior to commercialization. The company estimates it will need some $300 million in commitments over the next few years to commercialize the HydroMax technology.

Alchemix had been focusing on the construction of a hydrogen production plant at one of the oil sands upgraders in Alberta, Canada, as a likely outcome. (Hydrogen is used to upgrade the bitumen.) Now it appears that a CTL project might be a possible outcome as well.

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April 22, 2006 in Coal-to-Liquids (CTL), Gasification, Hydrogen | Permalink | Comments (8) | TrackBack (2)

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Comments

Perhaps it could be mated to the algal oil technology to consume the carbon.Perhaps we can fulfill a function by writing these companies with our suggestions.Rather than snipe at each other we could be a clearing house of ideas.At worst we would be an annoyance,at best we could provide an interconnect that accelerates an energy revolution.I am intrigued by this website.I would be thrilled if it could become a living market of ideas for business and politcians to tap into.{write your reps and tell them about this site}the people that write the policies would then be educated on the plethora of emerging technologies at our disposal.Lets unite as Americans rather than fight as dems repubs,greens security peeps,this tech or that tech.I like my life in this country,lets work together to assure its continuation.

The people who have been writing policy have K Street adresses. Getting new ideas to people paid to listen to only one side of an argument involves extreme difficuty.

I didnt say it would be easy.I cant believe the first post was a whiny defeatist woe is us post.I didnt like the rallies for illegal immigration so I went to numbersusa.com and faxed my dismay to congress.They were getting 50,000 faxes in a day!Organize with others that share your point of view and the net can be a force multiplier.I am a republican but because I dont want my two kids in the military to die in an oil war I embrace alternatives to oil.We are in a war where we pay the costs of both sides.I have found common interest and goals with the lefties on this site.Lets work to move the country towards independent and cleaner energy.This is in the interest of left and right.There is no magic bullet tech to clean nirvana or independece heaven.There is instead a multi faceted approach that will embrace many technologies for periods of time that will then give way to others.We can fight at the threshhold or take the first step up.

They say they can easily capture the CO2 with this process. But what are they going to do with the CO2? Increased coal mining for energy is a formula for disaster unless the carbon is *permanently* sequestered somehow. Coal in the ground is sequestered forever.

Future Gren is developing the sequestration tech.Algal oil is one partial answer.There is no magic bullet but rather a series of steps that will lead to a clean and free future.Coal will be part of this process so lets look for the cleanest way to use it.We have met the enemy and he is us.The energy usage of the average American means that coal and many other sources need to be in the mix.I have just finished hanging laundry to avoid using energy.Conservation is needed and will help but is also just one piece of the puzzle.I believe my kids will live in a future of distributed energy.Most or all of the energy they use will be produced at home or close by.solar roofing,siding,windows,turby turbine,trash to energy at the dump.bri inc.,star tech etc.In my state the liberal reps{kennedy kerry etc}are joined with the repub governor to kill the cape wind project.I am at war with both parties on this.This peoject would be a pice of the puzzle that keeps my kids from fighting in the middle east.Join the war and go to www.capewind.org.Kennedy {dem} has Joined with Stevens{repub}to slip a poison pill into coast gaurd funding bill to give gov romney {repub} authority to kill the project.The project would provide seventy five percent of the power needs of Cape Cod.Clean ocean breeze power,no co2,just annoys millionares views from Nantucket and Marthas Vineyard.Dem and repub millionares.It has passed its environmental reviews.Green groups are flocking to its defence.If thousands of you support Capewind it would be a demonstration of the power of this site when we lefties and righties work together for a better future for our kids

If the carbon dioxide could be fed directly to algae and the algae in turn dried and used to run the iron-reduction process, the carbon loop could be closed and the system used to produce nothing but hydrogen.  Some CO2 would be lost along with the vented oxygen from the algae, but it could be replaced by biomass.

The big difficulty with these systems has got to be cost.  Sure, all of this stuff is possible, but if it isn't even remotely competitive nobody is going to build one.

Last, making hydrogen from coal does nothing to improve coal's environmental impact at the mine (tailings, subsidence, damage to water tables, mountains destroyed) or the expense of storing and using hydrogen.  Batteries are still about 1/10 the cost of hydrogen tanks and fuel cells, and they're improving at a blistering pace.

here is a real solution...similar to above post

see link for new ethanol feedstock from algae...

it uses CO2 to grow...

this technology can be added to this process to use the captured CO2...

http://www.usatoday.com/tech/science/2006-01-10-algae-powerplants_x.htm

http://www.veridium.com/news.php?id=29

ROI gets better everyday for these solutions war = expensive oil/gas in the UK they pay £1 a Litre thats say a exchange rate of $1.50. 1.50 x 4.54 = $6.81 a gallon.

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