ADSORPTION AND STRIPPING OF ETHANOL FROM AQUEOUS SOLUTION USING SEPABEADS207 ADSORBENT
M A Z IN A B D U L H U SSE IN B E D E N
ADSORPTION AND STRIPPING OF ETHANOL FROM AQUEOUS SOLUTION USING SEPABEADS207 ADSORBENT
M A Z IN A B D U L H U SSE IN B E D E N
A d isse rta tio n su b m itte d in fu lfillm en t o f th e re q u ire m e n ts fo r th e a w a rd o f th e d eg ree o f
M a s te r o f E n g in e erin g (C hem ical)
F a c u lty o f C h em ical E n g in e erin g U niv ersiti T eknoiogi M alay sia
ACKNOWLEDGEMENT
I would like express my sincere gratefulness to Allah for giving me strength and w isdom in whole my studying. Also I w ant to take this opportunity to introduce my gratefully acknowledge to my supervisors Dr. M UH AM M AD ABBAS AHM AD ZAINI and Dr. TU AN AM RAN TU AN to help me in this work. Their dedication, skillful guidance, helpful suggestions and encouragem ent m ade m e able to deliver a dissertation in an appreciable quality and standard, also I w ant to introduce my thanks to Dr. UM I AISA H to help me in first part o f the thesis.
Deep appreciation I w ant to introduce to my family especially my dear wife to give m e the hope and concentrate on my study.
I owe my special thanks to my friend Safaa Abdulhussein and to lab. mates Mr. M oham m ad Latfi, Mr. A hm ad Bukhairy, Mr. M oham m ed Rafiza, Mr. zulkifli, M iss.Saadiah, M r.M oham ad H alim and Miss. Aishah for their kindness, helping me and sharing their experience. G reat thanks to all staff o f chemical engineering departm ent to support and advise m e to finalize my project.
ABSTRACT
There is a problem o f increasing o f CO2 and CO in environm ent from the use o f fossil fuel. Ethanol is a good alternative fuel or additive to gasoline to improve octane num ber, using ethanol will decrease CO and CO2 emissions. For these reasons, production o f ethanol by ferm entation is a prom ising solution. This w ork aim ed to evaluate suitable technique o f separation using adsorption method. B est conditions o f adsorption and stripping processes were studied in this work. The ethanol solution with 10wt% concentration, i.e., sim ilar to the product o f ferm entation process was used as feed. The separation was occurred in adsorber tube containing polym er Sepabeads207 at different tem peratures (20 - 40°C), also (pH) (4 - 7), tim e o f adsorption (5 - 25 minutes). Also tim e o f stripping (desorption) was studied betw een 15 and 35 m inutes at different tem peratures o f air (80 - 95°C). The evaporated ethanol was condensed by cold w ater and the concentration o f liquid ethanol was m easured using refractom eter and gas chromatography. The results show the best conditions for adsorption process are: tim e = 5 m inutes; tem perature = 20 °C and pH= 4, while the best conditions for striping process are: tim e = 15 m inutes and tem perature = 80 °C. By applying the best conditions for both adsorption and stripping processes, ethanol concentration o f 46wt% was able to be obtained. The adsorbent capacity o f Sepabeads207 is 0.22g ethanol/g adsorbent, while the adsorbent selectivity is 7.75 — g e t h a n o l/ g w a te r ( a d so rb ed )— the
g e t h a n o l/g w a te r (o rig in a l s o lu t io n )
efficiency o f adsorbent is 100%. From this study can be concluded that using o f Sepabeads207 to adsorb ethanol in static solution better than continues w ith applying best conditions.
ABSTRAK
Terdapat m asalah dengan peningkatan CO2 dan CO dalam persekitaran hasil daripada penggunaan bahan api fosil. Etanol adalah pilihan bahan api yang baik atau sebagai bahan tam bah dalam petrol untuk m eningkatkan nom bor oktana, penggunaan etanol akan m engurangkan pelepasan CO dan CO2. Justeru, penghasilan etanol m elalui penapaian m erupakan bakal jalan penyelesaian. Kajian ini bertujuan untuk menilai teknik pem isahan yang sesuai dengan kaedah penjerapan. Keadaan terbaik proses penjerapan dan pelucutan telah dikaji. Larutan etanol berkepekatan 10wt%, iaitu kepekatan yang sam a dengan produk proses penapaian digunakan sebagai suapan. Pem isahan berlaku dalam turus penjerapan yang m engandungi polim er Sepabeads207 pada suhu (20 - 40°C), ju g a pH (4-7), dan m asa penjerapan (5 - 25 m init) yang berbeza. Juga m asa pelucutan (penyahjerapan) dikaji di antara 15 dan 35 minit, dan pada suhu udara yang berbeza (80 - 95°C). Etanol tersejat telah dicairkan dengan air sejuk dan kepekatan cecair etanol diukur dengan refraktom eter dan gas kromatografi. Keputusan m enunjukkan keadaan terbaik untuk proses penjerapan ialah: m asa = 5 minit; suhu = 20°C dan pH = 4, m anakala keadaan terbaik untuk proses pelucutan ialah: m asa = 1 5 m init dan suhu = 80°C. Dengan m enggunakan keadaan terbaik untuk kedua-dua proses penjerapan dan pelucutan, kepekatan etanol 46wt% telah diperolehi. M uatan penjerap Sepabeads207 ialah 0.22g etanol / g penjerap, m anakala pem ilihan penjerap ialah 7.75 dan kecekapan 100%. D aripada kajian ini dapat disim pulkan bahaw a Sepabeads207 m enjerap etanol lebih baik dalam larutan statik berbanding turus dengan m engenakan keadaan terbaik.
