sparky wrote:.
Funny I didn't follows the Lynch thread , But I guess it's some kind of synchronicity ,
the part about the rum was very interesting
back to Venezuela , so far , My understanding is that they sinmply mix their crap with lighter stuff to create blend
is it possible , if uneconomical to hydrogenize the heavies to change their carbon chains ?
it's more of a refinery man subject , I would be keen to know if there has been any production
after all if one is talking of coal to liquid , this would be already half the way there
Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
ROCKMAN wrote:vt - You've awaked some deeply buried memory. Seems like it might have been scuttle butt inspired by the "Arab Embargo" in the 70's.
ROCKMAN wrote:Now that I think of it: why are we talking about Orimulsion since it appears Venezuela stopped selling it 10 years ago? Interesting story about that...from 2007:
New Brunswick Premier Shawn Graham says a failed multimillion-dollar fuel deal between NB Power and the Venezuelan government is a closed chapter in the province's history. The deal was dubbed the "Orimulsion fiasco" by the Liberals during the 2006 election campaign, with Liberal Leader Graham promising an inquiry into what went wrong. Last week, the utility announced it had reached an out-of-court settlement, with Venezuela agreeing to pay NB Power $338 million.
NB Power said it had signed a supply contract with a Venezuelan government-owned fuel company in 2004 to buy inexpensive Orimulsion fuel. Venezuela then stopped selling the fuel, causing the deal to fall through, but not before $700 million was spent to refurbish the Coleson Cove generating stationto burn the bitumen-based fuel.
Objectives of the Present Study
The objective of the study is to identify the impact of the Crude Oil (CRO) and Light Fuel Oil (LFO) on Wartsila Engine and the engine performance. It also aims to know the economic significance to the Plant Operation and effect on the Surrounding environment.
There is a big increase on spare parts usage since the start of the CRO[Crude Oil] operation. This means that the quality of fuel has a big contribution on the wear and tear of the engine parts and directly affecting the engine performance. It has also a big impact economically in terms of spare parts cost. During the engine overhauling, a significant amount of carbon deposit was found on the engine combustion chamber as shown on the picture above fig. (4.4) and fig. (4.5). Too much carbon accumulation on the camber will increase the risk of cylinder bore polishing and will eventually leads to lose compression, high lube oil consumption and decrease on engine performance.
Since the start of CRO operation, several instances of engine hard starting had been experienced. The problem has been addressed by replacing the injection pumps. During the inspection, pitting/erosion marks on the plunger and barrel and broken delivery valve springs were found as shown on Fig.(4.6) and Fig. (4.7). The pitting and erosion marks are normally noticeable during major overhaul in which plunger and barrels are due for replacement. However, this problem on the injection pumps happened even far below the recommended overhauling interval. The early deterioration of the injection pumps can be attributed due to a high TAN[Total Acid Number] of the crude oil.
Fuel leakage on the fuel lines is a common issue since the start of crude oil operation. Most of these leaks caused an engine forced stoppage. During the inspection as shown in Fig. (4.8), Fig. (4.9) and Fig. (4.10) erosion on the sealing surface caused the fuel high pressure pipes and injector connecting piece fuel leakages. The erosion seems to be an acid attack and can also be attributed to due to the high TAN of the crude oil.
Too much carbon deposit was also noted on the fuel injector nozzle Fig. (4.11) that can be due to low quality of fuel. Poor fuel injection will cause higher fuel consumption, low engine performance, carbon build-up on the combustion chamber and soon will have a consequential damage on the engine components and may even bring an engine breakdown if taken for granted for a longer time.
A complete CRO analysis is needed to have an accurate interpretation of the fuel properties and its impact on the engine components and how to do any possible adjustments to fine tune the engine operation. An additional fuel treatment process may be required to lower the TAN (i.e. Total Acid Number) of the crude oil.
Toxicity
Crude oil is a mixture of many different kinds of organic compounds, many of which are highly toxic and cancer causing.
Exhaust
When oil or petroleum distillates are burned usually the combustion is not complete. This means that incompletely burned compounds are created in addition to just water and carbon dioxide .The other compounds are often toxic to life. Examples are carbon monoxide and methanol. Also, fine particulates of soot blacken humans' lungs and cause heart problems or death. Soot is cancer. Therefore, safety precaution must be taken when dealing with petroleum exhaust.
Acid Rain
High temperatures created by the combustion of petroleum cause nitrogen gas in the surroundings air to oxidize, creating nitrous oxides. Nitrous oxides, along with sulfur dioxide from the sulfur in the oil, combine with water in the atmosphere to create acid rain. Acid rain causes many problems such as dead trees and acidified lakes with dead fish. Trees killed by acid rain, an unwanted side effect of burning petroleum. Acid rain leads to increased corrosion of machinery.
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