How long does it take to fuel the "typical" CNG car?

Coal, Corn, and CNG!

Seriously, yes, we are having supply problems because the world is sucking on the SAME hose( oil supplies).
But,
What if .....traders can no longer ship energy to the highest bidder?
What if .....the USA had energy resources that could not be easily exported, to say, China or India?( I know we don't presently do this)
WHAT would happen is the price of energy would stablize or actually DECREASE in the USA!
Unless the aluminium battery is realized, the ONLY energy source that cannot be exported is ELECTRICITY!
If Congress and the Adminstration focued on DIRECT electric energy production(wind, solar, tidal),
We will have Peace, Power and Price, to our advantage.

Let the rest of the world fight over the remaining drops from the oil hose.

Michigan imports about 25% of its electricity from Canada. Decades ago Bucky Fuller showed us how a global electrical grid could be established with a very high capacity 50 mile link across the Bering Sea. A global grid could distibute solar and wind power from wherever it is generated to wherever it is needed 24/7/365.

I own a CNG business in the UK that supplies trucks. The storage vessels are rated at 300 bar, with a 250bar settled pressure. Range is 450 miles, engines 380 bhp, dedicated CNG. All vehicles love to run on CNG, only a matter of time before the UK catches up wiuth Germany which has built 700 CNG stations in the last 3 years....why convert natural gas to hydrogen when you can just burn it directly in the engine!! Low pollution, low CO2, low noise.....no issues at all!

NG is awfully hard to transport. In developed countries construction of new pipelines is next to impossible. Compression and liquefaction takes sizable part of its energy. For US driver, who inflate their tires only when he will notice sparks from the rim scratching asphalt, 300 bar NG tank is a ticking bomb. One explosion will be enough for US lawyers to bankrupt whole NG industry. Yes, NG buses are the cleanest vehicles possible, and NG is great for refuse trucks and lorries too, thought due to high maintenance cost NG buses are no less expensive to run then clean diesel (at least in NY, where diesel fuel is not artificially overpriced)

Note, however, that NG is a source for synthesis of methanol, ethanol, butanol, synthetic gasoline and diesel, MTBE, DME, etc. It is possible to convert NG to liquid at remote wellhead and transport it as liquid. Huge gas-to-liquid plants begin operation in Bahrain and China. I believe it is the best technology we have at hand.

If Pakistan has 26.83 TcF of proven reserves, and pumps 0.84 TcF per year, then it will deplete its proven reserves in about 32 years. That's not a long time.

0.84 TcF, as of the year 2003, does not account for the rapid growth in demand that an en masse switchover of automobiles from gasoline to CNG will produce, nor does it account for the continuing growth in demand that a growing population and growing economy will produce.

On the other hand, 26.83 TcF accounts for only the proven and feasibly recoverable reserves at the moment. That number could grow with further prospecting and technological developments. But I wonder what its natural upper limit really is.

I am not confident that CNG is anything more than a middle-term stopgap for a country like Pakistan.

Andrey - Re: "NG is awfully hard to transport." Not correct. We've got vast pipeline networks spanning hundreds of thousands (millions?) of miles throughout the world. It is in fact easier (and safer) to transport than gasoline, diesel or propane.
Brett,
Go educate yourself, before you make these senseless statements. I suggest you start with thermodynamics. Basically, it comes down to this: the lower the density of a fluid, the more energy-intensive it is to transport. Hence it always requires more energy to move a ton of gas than a ton of liquid. So it requires more energy to transport gas, i.e. it is more expensive.

It should be obvious that a gas transportation system is a lot more complicated that a liquid transportation system. Hint: you can open a liquid system and look inside, with no real loss of the fluid. Try that with a gaseous system!

As for safety, see the previous point. If your system springs a leak, the escaping gas has the potential to burn as fast as it escapes. For a liquid to burn, it must first evaporate. While some fluids evaporate rapidly (gasoline) others do not (diesel, crude, etc.)

Bottom line: It is always harder and less safe to transport fuel gas compared to liquid fuel.

Along with Pakistan's milestone, World has 5 million + CNG powered vehicles.

As for the short range, current CNG powered vehicles have a cylinder with only 200 bar capacity, 400 bar is technically proven and if this is implemented, vehicles will have 400 mile range which is good enough.

The best bet is the bi-fueled vehicles with a 20-30 mile CNG range pretty much like the proposed plugin hybrids.

It will sell fast whether the place has CNG supply or not.

CNG can be produced cheaply and efficiently from gasification of all types of inedible waste biomass, in comparison to much more expensive, complex and slow process of cellulosic ethanol production. Thus, CNG can be considered also as a potentially renewable fuel. If this resource is very efficiently used, along with mixed-in hydrogen produced from renewable sources such as solar and wind energy, we can clearly and cleanly move away from fossil fuels that are polluting and causing global warming.
Roger, can't say I am beside myself when it comes to cellulosic ethanol, except that it is a huge step forward from the politically-favored, but idiotic corn ethanol.

That said, I still think a liquid fuel is the way to go. So I would take the syngas from your biomass gasification step and convert it to liquid fuel, via Fischer-Tropsch. Some important advantages:
1. Fuel chemically identical to existing fuels: Can be blended at any convenient ratio, and scaled up as it matures. No need to build a "hydrogen highway".
2. After blending it can be pumped in existing pipelines, unlike E85 or eben E10.
3. No issue with gelling, unlike biodiesel in Minnesota this winter.
4. No need to change anything in your car. In fact, you won't even notice the difference!

Seems like a no-brainer to me: produce fuels identical to the existing supplies, except we switch from crude to local supply. And this way you can pace it to any convenient rate.

I am study engineering of machine at universty and I ınterested about lng (liquified natural gas) tecnology and ı wondering how we can use lng in our vehicles ?
I mean what is process.

CNG in Pakistan is a thriving business. New stations are popping up every week somewhere or the other.
The only drawback i see is the lack of trunk space.
Other than that, it's pretty cheap and cool!

We specialize in the manufacture of LPG equibement
we are at your disposal for any information and ask you d "agree sir our Sincerely