简介:Thisarticlereferstotheresultsofsmall-scaleandcommercialtestsonhigh-temperaturecrackingofC4fractioninFCCunittoincreasethepropyleneyield.ThebenchtestsrevealedthattheconversionrateofC4fractionduringhigh-temperaturecrackingreached37.38%andpropyleneyieldwasequalto15.60%withtheconversionrateofC4olefinsequatingaround50%.Theresultsofcommercialapplicationshowedthatadoptionofthetechnologyforhigh-temperaturecrackingofC4fractioninFCCunithadledtoanincreaseofpropyleneyieldby2.16%withnoremarkablechangesintheyieldsandpropertiesofotherproducts.
简介:BMIL-53(Fe)/MWCNTshybridmaterialwaspreparedviathesolvethermalsynthesismethod.TheresultingsampleswerecharacterizedbyX-raydiffraction,FT-IRspectroscopy,scanningelectronmicroscopy,UV-Visabsorptionspectroscopy,theBrunauer-Emmet-Tellermethod,andphotoluminescencespectroscopy.TheresultshowedthattheintroductionofmultiwalledcarbonnanotubestotheMIL-53(Fe)canincreasethesurfaceareaofthecomposites,suppresstherecombinationofphotogeneratedelectron-holepairsandpromotetheelectrontransferprocess.ThehybridmaterialshowedoptimalphotocatalyticperformanceinthedegradationofRhodamineBundertheirradiationofultravioletandnaturallight.
简介:DuringJuneandJuly2003,JingmenPetrochemicalCompanycardedoutthecommercialtestontechnologyforhigh-temperaturecrackingofC5fractiontodecreaseolefincontentofgasolineinDCCU.ThetestresultsshowedthattheolefincontentofDCCgasolinehaddecreasedfrom68.32m%to42.5m%,meanwhilethepropyleneyieldincreasedby0.90m%.
简介:炼油事业部目前正在着手解决重一C6分离装置压降上升问题,以实现装置的安全稳定运行。5月份,重一操作人员在监测时发现,C6分离装置反应系统压降明显上升。技术人员经过分析认定,原料烯烃含量较高,提高反应温度后反应器床层上部瓷球、催化剂结焦导致反应器压降上升。另外,目前使用的MH-508催化剂不能适应反应状况,也是导致反应器压降上升的原因之一。为了确保生产稳定,装置操作人员通过精心调节,设定原料烯烃含量指标,修改反应温度指标,更新氢压机,使装置的反应压降明显降低。为了进一步降低反应压降,事业部决定于近期启用HDO-18催化剂。该催化剂是一种低温催化剂,已经在燕山、茂名石化公司使用,证明可使C6分离装置的反应温度下降,并确保产品质量达到特定企业指标。