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Dortmund Data Bank
Thermophysical Data for Process Design
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DDB#	Name	CAS-RN	Formula
174	Water	7732-18-5	H₂O	Overview	Details
579	Methanethiol	74-93-1	CH₄S	Overview	Details
1051	Methane	74-82-8	CH₄	Overview	Details
2187	Methyldiethanolamine (MDEA)	105-59-9	C₅H₁₃NO₂	Overview	Details

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Mixture Data

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**Vapor-Liquid Equilibria (VLE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	7	260	32
579	Methanethiol		12	n.a.
1051	Methane			5

**Heats of Mixing (HE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	65	7
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Gas Solubilities (GLE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	21	128	n.a.
579	Methanethiol		1	n.a.
1051	Methane			1

**Activity Coefficients at Infinite Dilution (Pure Solvents) (ACT)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	5	n.a.	n.a.
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Liquid-Liquid Equilibria (Miscibility Gaps) (LLE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	5	n.a.	n.a.
579	Methanethiol		1	n.a.
1051	Methane			n.a.

**Heat Capacities of Mixtures, Excess Heat Capacities (CPE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	n.a.	69
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**(A)zeotropic Data (AZD)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	2	11	11
579	Methanethiol		5	n.a.
1051	Methane			n.a.

**Solid-Liquid Equilibria (SLE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	1	6
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Densities and Volumes of Mixtures, Excess Volumes (VE)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	17	145
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Critical Data of Mixtures (CRI)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	5	n.a.
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Mixture Viscosities (VIS)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	n.a.	157
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Mixture Surface Tensions (MSFT)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	51	38
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Mixture Speeds of Sound (MSOS)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	n.a.	6
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Mixture Thermal Conductivities (MTCN)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	9	1
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Mixture Dielectric Constants (MDEC)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	n.a.	4
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Mixture P-v-T Data (MPVT)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	20	67
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Gas Hydrate Data (GHD)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	1	246	n.a.
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Diffusion Coefficients (DIF)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	8	9
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Further Thermodynamic Properties (X)**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	n.a.	55	18
579	Methanethiol		n.a.	n.a.
1051	Methane			n.a.

**Total**
DDB#	Name	579	1051	2187	Methyldiethanolamine (MDEA)
174	Water	41	876	570
579	Methanethiol		19	n.a.
1051	Methane			6

Dortmund Data Bank Version: February 2024

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