Improved calculations increased toluene conversion at Taiwan refinery

Journal Article · Mon Jun 13 04:00:00 EDT 1994 · Oil and Gas Journal; (United States)

OSTI ID:7013209

Tsai, T C; Hu, H C; Tsai, K Y ^[1]; Jeng, F S ^[2]

---

1. Chinese Petroleum Corp., Chiayi (Taiwan, Province of China)
2. Chinese Petroleum Corp., Kaohsiung (Taiwan, Province of China)

A new method of calculating catalyst circulation rate on-line improved the operating efficiency of the moving-bed transalkylation unit at chinese Petroleum Corp.'s (CPC) refinery at Kaohsiung, Taiwan. The improved measurements increased toluene conversion by 3 wt %/pass and reduced energy usage by about $220,000/year in the xylene production unit. Among the processes that produce mixed-xylenes, toluene disproportionation toluene/nine-carbon aromatics (A9) transalkylation are the major production routes. Catalyst circulation rate is an important operating variable. It affects reactor and regenerator operations and unit performance. Reliable measurement of circulation rate thus is necessary to the efficient operation of a transalkylation unit. CPC has developed a reliable and accurate on-line CCR measurement method for moving-bed transalkylation units. The method is based on a heat balance calculation in the reactor.

• OSTI ID: 7013209
• Journal Information: Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 92:24; ISSN OIGJAV; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKYLATED AROMATICS
ALKYLATION
AROMATICS
ASIA
CALCULATION METHODS
CATALYSTS
CHEMICAL REACTIONS
CHINA
ECONOMICS
EFFICIENCY
HYDROCARBONS
INDUSTRIAL PLANTS
ISLANDS
MASS TRANSFER
ON-LINE MEASUREMENT SYSTEMS
ON-LINE SYSTEMS
ORGANIC COMPOUNDS
PETROLEUM REFINERIES
PHYSICAL PROPERTIES
SPECIFIC HEAT
TAIWAN
THERMODYNAMIC PROPERTIES
TOLUENE
XYLENE-PARA
XYLENES