Latest revision as of 13:01, 26 July 2025

Basics

Often abbreviated as PODE ‘’’p’’’oly’’’O’’’xymethylene’’’d’’’ymethl’’’e’’’ther, OMEx ( ‘’’O’’’xy’’’m’’’ethyle dimethyl ‘’’e’’’thers where X is the chain length) or more infrequently POMDME
Polyoxymethylene Dimethyl Ethers are a class of Oligomers (Something in between a compund and a giant chain polymer) related to DME
They have the advantage of being liquid at STP
- Thus they can be used with more conventional fuel system/blended into Diesel Fuel (in a similar manner to how Biodiesel is currently blended, or how Ethanol and other Alcohol Fuels are blended into Gasoline
More complex to synthesize than Methanol or DME however

Called Dimethoxymethane
- Also known as “Formaldehyde dimethylacetal”
- C₃H₈O₂
- (CH3O)2CH2
- (CH₃O)₂CH₂
Properties (as of now pulled from wikipedia):
- Density: 0.8593 g cm−3 (at 20 °C)
- Melting Point −105 °C
- Boiling Point 42 °C
- Vapor Presssure 330 mmHg (20 °C)
  - Need to see how this compares to how RVP is measured
- NIOSH (US health exposure limits):
  - PEL TWA of 1000 ppm
  - REL TWA of 1000 ppm
  - IDLH TWA of 2200 ppm
  - GRANTED as with more novel/niche chemicals take this with a grain of salt
  - ALSO need to see if standard 5 Gas Monitors / LEL + VOC meters will accurately pick up the presence + concentration of this

@@ Line 5: / Line 5: @@
 **Thus they can be used with more conventional fuel system/blended into Diesel Fuel (in a similar manner to how [[Biodiesel]] is currently blended, or how [[Ethanol]] and other [[Alcohol Fuels]] are blended into [[Gasoline]]
 *More complex to synthesize than [[Methanol]] or [[DME]] however
+=Oligomers=
+==OME₁==
+*Called Dimethoxymethane
+**Also known as  “Formaldehyde dimethylacetal”
+**C₃H₈O₂
+** (CH3O)2CH2
+** (CH₃O)₂CH₂
+*Properties (as of now pulled from wikipedia):
+**Density: 0.8593 g cm−3 (at 20 °C)
+**[[Melting Point]] −105 °C
+**[[Boiling Point]] 42 °C
+**[[Vapor Presssure]] 330 mmHg (20 °C)
+***Need to see how this compares to how [[RVP]] is measured
+**[[NIOSH]] (US health exposure limits):
+***[[PEL]] [[TWA]] of 1000 ppm
+***[[REL]] [[TWA]] of 1000 ppm
+***[[IDLH]] [[TWA]] of 2200 ppm
+***GRANTED as with more novel/niche chemicals take this with a grain of salt
+***ALSO need to see if standard [[5 Gas Monitors]] / [[LEL]] + [[VOC]] meters will accurately pick up the presence + concentration of this
 =Synthesis=