Purification of Acrylic acid from the Ternary System (Acrylic acid + Water + Acetic acid) using Melt Crystallization
- 주제(키워드) ternary SLE , Crystallization , Visual method , Wilson , NRTL , 삼성분계 고-액상평형 , 결정화 , 육안관측법
- 발행기관 고려대학교 대학원
- 지도교수 강정원
- 발행년도 2023
- 학위수여년월 2023. 8
- 학위구분 석사
- 학과 대학원 화공생명공학과
- 세부전공 화공생명공학전공
- 원문페이지 86 p
- UCI I804:11009-000000277442
- DOI 10.23186/korea.000000277442.11009.0000130
- 본문언어 영어
초록/요약
A study was conducted to reduce energy costs and carbon emissions by designing a melting crystallization process of acrylic acid. Based on the ternary solid-liquid phase equilibrium(SLE), pure acrylic acid was obtained from major impurities. The solid-liquid phase equilibrium data of the ternary acrylic acid-water-acetic acid constituting the eutectic system were measured using visual observation with an uncertainty of 0.3 K in the 245.0–290.0 K range. The system was simulated using the Wilson model and the NRTL model, and parameters that could well explain the experimental values were selected. The process operation efficiency according to the selection of models and parameters was compared from various viewpoints. The Wilson model best explained the system when the parameters were adjusted by dividing the zones by reflecting both binary and ternary experimental data.
more초록/요약
아크릴산의 용융 결정화 공정을 설계하여 에너지비용 및 탄소배출량을 절감시키기 위한 연구가 수행되었다. 삼성분계 고-액 상평형에 기반하여 주요 불순물로부터 순수한 아크릴산을 얻어내고자 하였다. 공융계를 이루는 아크릴산-물-초산의 삼성분계 고-액 상평형도 데이터가 245.0-290.0 K 범위에서 0.3K 의 불확도를 가지고 육안 관측법을 이용하여 측정되었다. Wilson 모델과 NRTL 모델을 이용하여 시스템이 모사되었고, 실험값을 잘 설명할 수 있는 파라미터를 선정하였다. 모델 및 파라미터의 선택에 따른 공정 운영 효율을 다양한 관점에서 비교하였다. Wilson 모델에서 이성분계 및 삼성분계 실험 데이터를 모두 반영하여 구역을 나누어서 파라미터를 조정하였을 때 가장 계를 잘 설명하였다.
more목차
TABLE OF CONTENTS
ABSTRACT ...........................................................................................................................i
국문 초록...............................................................................................................................ii
TABLE OF CONTENTS .....................................................................................................iii
LIST OF TABLES ................................................................................................................v
LIST OF FIGURES..............................................................................................................vi
NOMENCLATURE.............................................................................................................ix
CHAPTER 1. INTRODUCTION..........................................................................................1
CHAPTER 2. THEORETICAL STUDY ..............................................................................6
2.1 Acrylic Acid Production Process...........................................................................6
2.1.1 Synthesis of Acrylic acid ..........................................................................6
2.1.2 Purification of Acrylic acid.......................................................................7
2.2 Melt Crystallization .............................................................................................10
2.2.1 Definition of Melt Crystallization...........................................................10
2.2.2 Technical Aspect of Melt Crystallization ...............................................12
2.3 Solid-Liquid Phase Equilibrium (SLE)................................................................16
2.3.1 Binary Solid-Liquid Equilibrium............................................................19
2.3.2 Ternary Solid-Liquid Equilibrium ..........................................................19
2.4 Thermodynamic Modeling ..................................................................................23
2.4.1 Wilson model..........................................................................................25
2.4.2 NRTL model ...........................................................................................26
2.5 Determination of Solid-Liquid Equilibrium ........................................................27
2.5.1 Analytical Method...................................................................................27
2.5.2 Thermal Method......................................................................................28
2.5.3 Synthetic method.....................................................................................29
CHAPTER 3. EXPERIMENTAL STUDY.........................................................................31
3.1 Materials..............................................................................................................31
iv
3.2 Solubility Measurement.......................................................................................31
3.2.1 Step-Warming Visual Observation .........................................................31
3.2.2 Differential Scanning Calorimeter (DSC)...............................................33
CHAPTER 4. RESULT AND DISCUSSIONS ..................................................................36
4.1 Binary SLE diagram ............................................................................................36
4.2 Ternary SLE diagram ..........................................................................................43
4.2.1 Representation of Phase Diagram...........................................................43
4.2.2 Effect of Parameter Regression and Modeling .......................................48
4.2.3 Effect of Model Selection .......................................................................55
4.3 Design of Crystallization Process........................................................................63
4.3.1 Parameter Regression..............................................................................63
4.3.2 Selection of Regression Data ..................................................................63
4.3.3 Distillation and Crystallization ...............................................................67
CHAPTER 5. CONCLUSION ............................................................................................68
REFERENCES....................................................................................................................70
