Ramsbottom Carbon Residue
Encyclopedia
Ramsbottom Carbon Residue, which abbreviation is RCR, is well known in the petroleum industry
as a method to calculate the carbon residue of a fuel. The carbon residue value is considered by some to give an approximate indication of the combustibility and deposit forming tendencies of the fuel.
. Carbon residue is an important measurement for the feed to the refinery process fluid catalytic cracking
and delayed coking
.
), Conradson Carbon Residue (CCR
) or Micro Carbon Residue (MCR
). Numerically, the CCR value is the same as that of MCR.
Sometimes the carbon residue value can be listed as residual carbon content, RCC, which is normally the same as MCR/CCR.
For the test 4 grams of the sample are put into a weighted glass bulb. The sample in the bulb is heated in a bath at 553°C for 20 minutes. After cooling the bulb is weight again and the difference noted.
Petroleum industry
The petroleum industry includes the global processes of exploration, extraction, refining, transporting , and marketing petroleum products. The largest volume products of the industry are fuel oil and gasoline...
as a method to calculate the carbon residue of a fuel. The carbon residue value is considered by some to give an approximate indication of the combustibility and deposit forming tendencies of the fuel.
History
This method originated from Dr J.R. Ramsbottom. under the supervision of Pr. Abdullah Ateeg.The carbon residue of a fuel
The Ramsbottom test (ASTM D-524) is used to measure carbon residues of an oil. In brief, the carbon residue of a fuel is the tendency to form carbon deposits under high temperature conditions in an inert atmosphere. This is an important value for the crude oil refinery, and usually one of the measurements in a crude oil assayCrude oil assay
A crude oil assay is essentially the chemical evaluation of crude oil feedstocks by petroleum testing laboratories. Each crude oil type has unique molecular, chemical characteristics. No crude oil type is identical and there are crucial differences in crude oil quality...
. Carbon residue is an important measurement for the feed to the refinery process fluid catalytic cracking
Fluid catalytic cracking
Fluid catalytic cracking is the most important conversion process used in petroleum refineries. It is widely used to convert the high-boiling, high-molecular weight hydrocarbon fractions of petroleum crude oils to more valuable gasoline, olefinic gases, and other products...
and delayed coking
Coker unit
A coker or coker unit is an oil refinery processing unit that converts the residual oil from the vacuum distillation column or the atmospheric distillation column into low molecular weight hydrocarbon gases, naphtha, light and heavy gas oils, and petroleum coke...
.
Calculation methods
There are three methods to calculate this carbon residue. It may be expressed as Ramsbottom Carbon Residue (RCRRCR
RCR may stand for:* Radio Caracas Radio* Association of Radio Industries and Businesses* Ramsbottom Carbon Residue* RCR Refrigeracion S.A. de C.V., a mexican HVAC Company* Richard Childress Racing, a championship-winning NASCAR team...
), Conradson Carbon Residue (CCR
CCR
-Music:* Creedence Clearwater Revival, a swamp rock band** Creedence Clearwater Revival , a 1968 debut album by Creedence Clearwater Revival** Creedence Clearwater Revisited, a rock band formed by former Creedence Clearwater Revival members...
) or Micro Carbon Residue (MCR
MCR
- Music :* Modena City Ramblers, an Italian folk rock band* My Chemical Romance, an American rock band* Middle Class Rut, an American rock band- Organisations :* Maryport and Carlisle Railway, a pre-gouping British railway company...
). Numerically, the CCR value is the same as that of MCR.
Sometimes the carbon residue value can be listed as residual carbon content, RCC, which is normally the same as MCR/CCR.
For the test 4 grams of the sample are put into a weighted glass bulb. The sample in the bulb is heated in a bath at 553°C for 20 minutes. After cooling the bulb is weight again and the difference noted.