| 查看: 135 | 回复: 3 | |||
| 当前主题已经存档。 | |||
| 【悬赏金币】回答本帖问题，作者chuanchangli将赠送您 4 个金币 | |||
chuanchangli金虫 (小有名气)
|
[求助]
【求1993年一英文文献】+【有效期至2008年6月15日】
|
||
|
题目：《Endothermic character of toluene adsorption from supercritical carbon dioxide on activated carbon at low coverage 》的全文 Auteur(s) / Author(s) RECASENS F. ; VELO E. ; LARRAYOZ M. A. ; PUIGGENE J. ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s) Univ. politèc. Catalunya, ETSEIB, dep. chemical eng., 08028 Barcelona, ESPAGNE Résumé / Abstract Heat effects and volumetric properties are analyzed for the adsorption of toluene from supercritical carbon dioxide onto activated carbon at the limit of zero coverage, based on existing data for the system. Using values of the adsorption equilibrium constant at different temperatures as a function of fluid density, large, negative partial molar volumes for toluene in the fluid were obtained, which were previously unavailable. Numerical integration of the differential equation that expresses the isobaric temperature dependence of the equilibrium constant, coupled with parameter optimization, enabled us to estimate the differential enthalpy of toluene adsorption onto the surface from the ideal gas at the same pressure and temperature, in addition to the enthalpy of transfer from the fluid to the surface |
回复此楼» 猜你喜欢
一志愿北化求调剂
已经有4人回复
-
085601材料工程找调剂
已经有6人回复
-
318一志愿吉林大学生物与医药 求调剂
已经有3人回复
-
一志愿双一流机械285分求调剂
已经有4人回复
-
332求调剂
已经有8人回复
-
一志愿郑州大学，080500学硕，总分317分求调剂
已经有7人回复
-
一志愿武汉理工，总分321，英一数二，求老师收留。
已经有8人回复
-
375求调剂
已经有3人回复
-
南京大学化学调剂
已经有7人回复
-
070300化学354求调剂
已经有5人回复
wgf332
铁杆木虫 (著名写手)
- 应助: 0 (幼儿园)
- 金币: 8032.1
- 散金: 427
- 帖子: 2803
- 在线: 258.5小时
- 虫号: 545807
- 注册: 2008-04-14
- 性别: GG
- 专业: 多相流热物理学
★ ★
chuanchangli(金币+2,VIP+0):谢谢
chuanchangli(金币+2,VIP+0):谢谢
|
F. Recasens1, E. Velo, M. A. Larrayoz and J. Puiggené Department of Chemical Engineering, ETSEIB, Universitat Politècnica de Catalunya, Diagonal 647, E-08028 Barcelona Spain Received 3 July 1992; revised 15 February 1993. Available online 4 January 2002. This article is not included in your organization's subscription. However, you may be able to access this article under your organization's agreement with Elsevier. Abstract Recasens, P., Velo, E., Larrayoz, M.A. and Puiggené, J., 1993. Endothermic character of toluene adsorption from supercritical carbon dioxide on activated carbon at low coverage. Fluid Phase Equilibria, 90: 265-287. Heat effects and volumetric properties are analyzed for the adsorption of toluene from supercritical carbon dioxide onto activated carbon at the limit of zero coverage, based on existing data for the system. Using values of the adsorption equilibrium constant at different temperatures as a function of fluid density, large, negative partial molar volumes for toluene in the fluid were obtained, which were previously unavailable. Numerical integration of the differential equation that expresses the isobaric temperature dependence of the equilibrium constant, coupled with parameter optimization, enabled us to estimate the differential enthalpy of toluene adsorption onto the surface from the ideal gas at the same pressure and temperature, in addition to the enthalpy of transfer from the fluid to the surface. This is found to be large and positive near the critical conditions. Using the thermodynamic analysis of Kelley and Chimowitz, our results show that in terms of the enthalpy of transfer, the isothermal adsorption from a supercritical fluid is an endothermic process, thus explaining the retrograde behavior experimentally observed for the regeneration of carbon with supercritical CO2 at conditions not far from the solvent's critical point. Author Keywords: theory; method of calculation; infinite dilution; adsorption enthalpies; partial molar volumes; supercritical carbon dioxide; activated carbon; toluene 只能找到这些，全文没找到 |
2楼2008-06-13 22:16:06
3楼2008-06-13 23:07:51
4楼2008-06-14 00:21:50
