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Kinetic Understanding of the Syngas-To-DME Reaction System and Its Implications to Process and Economics

Xiang-Dong Peng

Air Products and Chemicals, Inc.

In this pdf format, this document has 53 pages and is 998.1kb.

Table of Contents

Abstract 2

1

 Introduction 2
2 Details of Experiments and Simulations 4
3 Kinetic Understanding 6
  3.1 The Relative Rate of Each Reaction and Their Roles in the Synergy 8
3.2 The Best Gas Composition for the LPDMETM Process 16
  3.2.1 A General Approach for Analysis of the Best Reactor Feed - Two-Term Approach 17
3.2.2 Illustration of the Approach Using a Single Reaction System with Power-Law Rate Expression 19
3.2.3 Application to Syngas-to-Methanol Reaction System 24
3.2.4 The Best Feed Composition for the Syngas-to-DME Reaction System 28
3.2.5 Discussion 32
4 The Schemes of the Syngas-to-DME Process Based on the Best Reactor Feed 34
  4.1 Simulation Details 35
4.2 Selection of a Recycle Scheme and Overall Reaction 35
4.3 Dependence of DME Productivity and Material Utilization on the Feed Gas Composition in the Chosen Recycle Case 36
4.4 Integration between the Syngas-to-DME Reactor and Syngas Generation Units 38
  4.4.1 Syngas-to-DME + CO2 Methane Reformer 39
4.4.2 Syngas-to-DME + CO2 Methane Reformer 41
4.4.3 Syngas-to-DME + Steam Methane Reformer + H2 Product 43
4.5 Discussion 46
5 Operating Regimes for the Syngas-to-DME Process and Economical Implications 47
References 51