Effortless English - Bubba’s Food

Mini story 

Sara Smith, who lives in San Francisco, went shopping for cat food.
Sara is 30, and lives at 3037 Market St. She has livedthere since 1990. Sara is married. She is
married to a man named John. She has beenmarried for 7 years.
They have two children, and one very big cat. Their son Bob is five years old and their daughter
Nancy is three. Their cat, Bubba, is 2 years old. Bubba is huge. He weighs 258 pounds (117
kilos)!
At 9am, Sara got intoher car and droveto the pet store. She bought 68 bags of cat food for $10
each plus tax. The regular price was $15, so she got a good deal.The total was $680. She paid
by credit card.
On her way home, Sara stopped at a convenience store to buy milk. Bubba loves milk. The milk
was $3.00 for one gallon, and Sara bought 30 gallons. She paid $100 and got $10 back in
change.
Sara got homeat 11 a.m. Bubba was waiting at the door. He was very hungry.  

File audio:  

Bubba's Food.mp3

Full ( file mp3 + text + vocabulary ) 

Generic Process Schematic - petro plant

This image get from http://www.processengr.com/ 

CDU Process:  Distill and separate valuable distillates (naphtha, kerosene, diesel) and atmospheric gas oil (AGO) from the crude feedstock.

The atmospheric residue (AR) with high boiling point  above 350oC (623K) was chosen can be subjected to several treatments, i.e., deasphalting, hydroprocessing and vacuum distillation.

Products of the vacuum distillation are vacuum residue (VR) and VGO.

VR can be deasphalted to produce DAO and asphalt or directly hydroprocessed.

The VGO is usually used as the feed for production of light and/or middle distillates either via hydroprocessing (hydrocracking) or via catalytic cracking.

The FCC and coking of heavy feeds form an integral part of many petroleum refineries. Virgin VGOs, as well as pretreated DAOs and HGOs have been typical feeds for the former process. However, after modifications of the conventional cracking units, RFCC process may also be able to handle the unpretreated DAO and ARs derived from sweet crudes. Hydroprocessing is the process of choice for heavier ARs and VRs, as well as topped heavy crudes.

The asphalt and coke, as the final refinery residues, have an impact on the overall performance of petroleum refineries.

(Reference from ebook: Catalysts for Upgrading Heavy Petroleum Feeds, chapter 2 )                                                                        

Natural gas and oil gas - Classification

The classification natural gas and oil gas includes: