NEW RESULTS ABOUT THE MECHANISM OF TLE FOULING IN STEAM CRACKERS

被引:35
作者
KOPINKE, FD [1 ]
BACH, G [1 ]
ZIMMERMANN, G [1 ]
机构
[1] WIP RES GRP, O-7050 LEIPZIG, GERMANY
关键词
FOULING; INHIBITION OF COKE FORMATION; PYROLYSIS; RADIOTRACER; STEAM CRACKING;
D O I
10.1016/0165-2370(93)80021-Q
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The deposition of coke-like products was studied in the postcracking zone (< 500-degrees-C) of a laboratory pyrolysis reactor coupled with a thermobalance. By means of C-14-labelled hydrocarbons, data on the contribution of individual feedstock components to the coke formation were obtained. Reactive, volatile hydrocarbons, like toluene and hexyne, do not contribute significantly to the deposits if they pass the postcracking zone undecomposed. The results favour as a dominant mechanism in transfer line heat exchanger fouling the condensation of heavy components of the fuel oil fraction and precipitation of tar droplets. At a catalytically active steel surface the coke formation from a cracker effluent at 500-degrees-C is strongly influenced by steam dilution.
引用
收藏
页码:45 / 55
页数:11
相关论文
共 16 条
[1]  
Albright L. F., 1983, PYROLYSIS THEORY IND
[2]   COKE FORMATION DURING PYROLYSIS - ROLES OF RESIDENCE TIME, REACTOR GEOMETRY, AND TIME OF OPERATION [J].
ALBRIGHT, LF ;
MAREK, JC .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1988, 27 (05) :743-751
[3]   MECHANISTIC MODEL FOR FORMATION OF COKE IN PYROLYSIS UNITS PRODUCING ETHYLENE [J].
ALBRIGHT, LF ;
MAREK, JC .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1988, 27 (05) :755-759
[4]   ANALYSIS OF COKE PRODUCED IN ETHYLENE FURNACES - INSIGHTS ON PROCESS IMPROVEMENTS [J].
ALBRIGHT, LF ;
MAREK, JC .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1988, 27 (05) :751-755
[5]  
DENTE ME, 1983, AICHE M HOUSTON
[6]  
FROMENT GF, 1990, REV CHEM ENG, V6, P293
[7]  
HORAK J, 1986, INT CHEM ENG, V26, P547
[8]  
HUNDROTS RS, 1989, CHEM ENG RES DES, V67, P632
[9]  
KAISER V, 1984, OIL GAS J, V82, P66
[10]   RELATIVE RATES OF COKE FORMATION FROM HYDROCARBONS IN STEAM CRACKING OF NAPHTHA .2. PARAFFINS, NAPHTHENES, MONOOLEFINS, DIOLEFINS, AND CYCLOOLEFINS, AND ACETYLENES [J].
KOPINKE, FD ;
ZIMMERMANN, G ;
REYNIERS, GC ;
FROMENT, GF .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1993, 32 (01) :56-61