过程工程学报
過程工程學報
과정공정학보
The Chinese Journal of Process Engineering
2007年
6期
1243-1248
,共6页
周建新%徐宏%张莉%刘京雷%戚学贵%彭博
週建新%徐宏%張莉%劉京雷%慼學貴%彭博
주건신%서굉%장리%류경뢰%척학귀%팽박
atmospheric pressure chemical vapor deposition%SiO2/S coating%HP40 tube%coke
SiO2/S coating was prepared on the inner surface of an HP40 tube using dimethyldisulfide and tetraethylorthosilicate by atmospheric pressure chemical vapor deposition (APCVD) to alleviate catalytic coking on the inner surface of radiant tube for ethylene production in petrochemical plants. The comparative coking experiments with the coated and uncoated HP40 tubes were carried out under the same cracking conditions. SiO2/S coating was compact and had excellent anti-coking property. The coke on the coated HP40 tube was about 22% of that on the uncoated HP40 tube, and only small granular coke was deposited on the coated HP40 tube. However, the filamentous coke formed on the uncoated HP40 tube. The thermal stability of SiO2/S coating was satisfactory at cracking temperature, and the anti-coking property of SiO2/S coating was still over 60% after 3 coking and decoking cycles.
