1115 Internet Journey: Coal to Liquid Fuel

Nov 10, 2008

November 11, 2008 (20081111_Internet_Journey)

Dear Bill,

I will begin to take you on a whirlwind tour of places to visit on the Internet. First, I must do some experimentation concerning the blog tool I am using for this writing. Therefore, I shall begin by showing you a series of places to visit. You need merely read the few words I write and then click on the URL presented in the body of the text.

Let’s practice a bit by researching one of our favorite discourse topics: coal to liquid fuel and plastics. One aspect of the overall material and energy flow system of turning eastern Montana lignite coal into liquid fuel is the coal gasification and production of syngas. Please study the following diagram and take note of the syngas flow.
http://upload.wikimedia.org/wikipedia/commons/9/96/IGCC_diagram.svg
Now take note of the picture in its true context. Be sure to explore a few URLs on the following page and use the back button to come back to here (http://blog.peaceengine.com/). If your browser is correctly setup you will notice that the URL links are changed as you click on them.
http://en.wikipedia.org/wiki/Integrated_Gasification_Combined_Cycle

Now study the following picture by clicking on the thumbnail image below.

Saturday, November 15, 2008

In the http://upload.wikimedia.org/wikipedia/commons/9/96/IGCC_diagram.svg
flow diagram notice the system which removes oxygen from the air. That oxygen is fed into the gasifier ensuring clean combustion of the coal.

Nitrogen is a by product of the oxygen separation from air. Nitrogen has its uses, in fertilizer, for example, http://en.wikipedia.org/wiki/Fertilizer

The primary goal is oxygen. Another alternative source of oxygen is the electrolysis of water, for example, by means of electricity from wind turbines and the direct current power grid.

Hydrogen is a far more useful by product because it can be bonded with carbon, forming polymers used in the plastics industry. Given recent concern about releasing carbon into the atmosphere, bonding the carbon with hydrogen in plastics makes more sense that bonding it with oxygen and releasing the carbon as carbon dioxide.

In terms of balanced science, one must accept the truth that plants breathe in carbon-dioxide and breathe out oxygen, as part of photosynthesis http://en.wikipedia.org/wiki/Photosynthesis

Therefore, it makes sense that during times of global earth warmth, when more of the earth’s surface is covered with plants, a carbon-dioxide rich atmosphere is conducive to the quick expansion of plant life.

Gasification is a thermo-chemical process in which carbonaceous (carbon-rich) feedstocks such as coal, petro-coke or biomass are converted into a gas consisting of hydrogen and carbon monoxide (and lesser amounts of carbon dioxide and other trace gases) under oxygen depleted, high pressure, high-heat and/or steam conditions. The resulting gaseous compound is called Syngas. http://fossil.energy.gov/programs/powersystems/gasification/howgasificationworks.html

In the case of eastern Montana lignite coal, its high water content means that the coal slurry supply needs less outside water coming into the rod mill. Raw sewage and agricultural bio-mass can be mixed with the coal feed stock. Such a system affords a community a full spectrum recycling solution for its carbon supply.

Syngas can be directly converted to DME using the Liquid Phase Dimethyl Ether Synthesis (LP-DME) process developed at the University of Akron in conjunction with Electric Power Research Institute. This direct one-step conversion of syngas-to-DME can then be an ideal front end for further conversion to diesel. http://www.netl.doe.gov/publications/proceedings/97/97cl/peng.pdf