Quote:
Originally Posted by 5cilinder
There was a scientific research that warned against useage agains premium diesel wich contained GTL (transformed gas into synthetic diesel) in combination with dpf's
Gtl burnes very clean but has the sideeffect to produce extra thin "supersoot"
wich needs higher temperatures to burn 650c/700c instead of 600c
Wih adblue systems it will probably burn , but dpf with post injection to produce 600c temperatures dpf's can plug or excessivly regenerate
|
Great, how do you know what fuel contains this stuff? Wikipedia says
"As of 2007, almost all diesel fuel available in the United States of America, Canada and Europe is the ULSD type." this worrying but another publication from Chevron in 2007 states this about GTL:
"
GAS-TO-LIQUID DIESEL
Another class of synthetic (non-crude oil derived) diesel fuel that has received significant attention recently is referred to as gas-to-liquid (GTL) diesel. GTL diesel is produced from natural gas using the Fischer-Tropsch® process, which was first developed in the 1920s. The Fischer-Tropsch® process uses special catalysts to convert natural gas through a carbon monoxide-hydrogen intermediate into a mixture of synthetic hydrocarbons referred to as syncrude. The syncrude is further refined via isomerization, hydrocracking/ hydrotreating, and fractionation processes to produce a completed fuel.
GTL processes can yield high-quality fuels with exceptional properties. Refined syncrude diesel, GTL diesel, is composed almost exclusively of paraffins, with virtually no aromatic hydrocarbon or olefins content. In addition, GTL diesel fuel is nearly free of sulfur and nitrogen. The cetane number of GTL diesel is significantly higher than conventional diesel – typically in the range from 70 to 75. GTL diesel is characterized by poor lubricity and must be treated with a commercial lubricity additive. In addition, it also has poor cold flow properties, limiting its potential use in cold weather applications.
At the same time, properly treated GTL diesel is fully compatible with existing diesel engine technology and can be used interchangeably (and mixed) with conventional diesel fuel. The energy density of GTL diesel is similar to conventional diesel. Typically, GTL diesel results in lower hydrocarbon, carbon monoxide, nitrogen oxide, and particulate emissions when compared with conventional diesel fuel. GTL diesel does not provide any advantage, however, in terms of CO2 tailpipe emissions.
GTL diesel has not seen widespread commercial use. Its intrinsic advantage of upgrading low-grade natural gas to valuable liquid products is balanced against capital investment and production costs, which are significantly higher for GTL fuels than for its crude- dervied counterparts. However, over the past decade, technological advances have been made that significantly reduce the cost of producing GTL fuels. As GTL production technology continues to improve and global energy demand continues to increase,
GTL fuels will become increasingly cost competitive and will become more common in the marketplace."
The full article is here:
http://www.chevronwithtechron.com/pr...ech_Review.pdf
So it gives the higher cetane number which is good (as mentioned before) but from what 5cylinders says it could be damaging the DPFs. Ah well just have to hope the DPF doesn't throw its legs in the air and give up regardless what fuel pump I use. I am now more confused than ever so better go and wash the car - it is Sunday after all!!!