化学工程
化學工程
화학공정
CHEMICAL ENGINEERING
2014年
3期
33-38
,共6页
吴建民%孙启文%张宗森%庞利峰
吳建民%孫啟文%張宗森%龐利峰
오건민%손계문%장종삼%방리봉
费托合成油品%加氢裂化异构化%热力学分析%反应限度
費託閤成油品%加氫裂化異構化%熱力學分析%反應限度
비탁합성유품%가경열화이구화%열역학분석%반응한도
Fischer-Tropsch syncrude%hydrocracking and isomerization%thermodynamic analysis%reaction limit
利用 Benson 基团贡献法和 ABWY 法计算了费托合成油品的标准摩尔生成焓、标准熵及摩尔定压热容等基础数据，在298-750 K，对费托合成油品加氢裂化异构化反应体系的反应焓、吉布斯自由能以及平衡常数等热力学数据进行了计算；对体系中各反应的热力学可能性与生成顺序进行了判断以及各反应的热力平衡与限度进行了分析。结果表明：费托合成油品加氢裂化异构化反应是放热反应，低温时大部分反应在热力学上均能够自发的进行，且平衡常数均较大，能够进行到较高的程度；从热力学上看，升高温度不利于加氢裂化异构化反应的进行，适宜反应温度的选择应兼顾各种反应的进行；烯烃比烷烃更容易发生加氢裂化异构化反应；所获得的热力学数据可为费托合成油品加氢裂化异构化工艺研究、反应器开发以及新型催化剂研制等提供理论依据。
利用 Benson 基糰貢獻法和 ABWY 法計算瞭費託閤成油品的標準摩爾生成焓、標準熵及摩爾定壓熱容等基礎數據，在298-750 K，對費託閤成油品加氫裂化異構化反應體繫的反應焓、吉佈斯自由能以及平衡常數等熱力學數據進行瞭計算；對體繫中各反應的熱力學可能性與生成順序進行瞭判斷以及各反應的熱力平衡與限度進行瞭分析。結果錶明：費託閤成油品加氫裂化異構化反應是放熱反應，低溫時大部分反應在熱力學上均能夠自髮的進行，且平衡常數均較大，能夠進行到較高的程度；從熱力學上看，升高溫度不利于加氫裂化異構化反應的進行，適宜反應溫度的選擇應兼顧各種反應的進行；烯烴比烷烴更容易髮生加氫裂化異構化反應；所穫得的熱力學數據可為費託閤成油品加氫裂化異構化工藝研究、反應器開髮以及新型催化劑研製等提供理論依據。
이용 Benson 기단공헌법화 ABWY 법계산료비탁합성유품적표준마이생성함、표준적급마이정압열용등기출수거，재298-750 K，대비탁합성유품가경열화이구화반응체계적반응함、길포사자유능이급평형상수등열역학수거진행료계산；대체계중각반응적열역학가능성여생성순서진행료판단이급각반응적열력평형여한도진행료분석。결과표명：비탁합성유품가경열화이구화반응시방열반응，저온시대부분반응재열역학상균능구자발적진행，차평형상수균교대，능구진행도교고적정도；종열역학상간，승고온도불리우가경열화이구화반응적진행，괄의반응온도적선택응겸고각충반응적진행；희경비완경경용역발생가경열화이구화반응；소획득적열역학수거가위비탁합성유품가경열화이구화공예연구、반응기개발이급신형최화제연제등제공이론의거。
The standard molar enthalpy of formation,the standard entropy and isobaric molar heat capacity of Fischer-Tropsch syncrude were estimated by Benson group contribution method and ABWY method.The enthalpy change,Gibbs free energy change and equilibrium constant of hydrocracking and isomerization reaction of Fischer-Tropsch syncrude were calculated as a function of the temperature from 298 K to 750 K.The thermodynamic possibility and formation sequences of hydrocracking and isomerization reaction of Fischer-Tropsch syncrude were judged.Meanwhile,the thermodynamic equilibrium and the limit of different reaction steps were also analyzed. The results show that the hydrocracking and isomerization reaction of Fischer-Tropsch syncrude is an exothermic reaction,most of which are spontaneous at low temperature and can reach to a deep extent.Improving the temperature is not good for hydrocracking and isomerization reaction from a thermodynamic point of view.The choice of the suitable temperature should take into account all the reactions.The occurrence of the hydrocracking and isomerization reaction of alkene is easier than that of alkane.The thermodynamic data obtained can provide the theoretical basis for the study of hydrocracking and isomerization reaction of Fischer-Tropsch syncrude process, reactor development and new catalyst preparation.
