2022
DOI: 10.1016/j.cej.2021.131020
|View full text |Cite
|
Sign up to set email alerts
|

Proof of concept of hydrothermal oxidation for treatment of triazine-based spent and unspent H2S scavengers from offshore oil and gas production

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

4
16
0

Year Published

2023
2023
2024
2024

Publication Types

Select...
6
1

Relationship

2
5

Authors

Journals

citations
Cited by 19 publications
(20 citation statements)
references
References 40 publications
4
16
0
Order By: Relevance
“…The actual pH established in the aqueous phase in contact with the sour gas stream in field operational use depends on the balance between the H 2 S absorption, which tends to decrease the pH of the aqueous phase, and the scavenging reactions, which tend to increase it. Technical solutions of HET have a pH of around 11 (see Section ), while spent scavenger samples are seen with a pH of around 9 . The pH of the aqueous phase in contact with the sour gas is expected to be in the range from 8–9 to 11–12.…”
Section: Methodsmentioning
confidence: 99%
See 3 more Smart Citations
“…The actual pH established in the aqueous phase in contact with the sour gas stream in field operational use depends on the balance between the H 2 S absorption, which tends to decrease the pH of the aqueous phase, and the scavenging reactions, which tend to increase it. Technical solutions of HET have a pH of around 11 (see Section ), while spent scavenger samples are seen with a pH of around 9 . The pH of the aqueous phase in contact with the sour gas is expected to be in the range from 8–9 to 11–12.…”
Section: Methodsmentioning
confidence: 99%
“…Monoethanolamine (MEA) is the main impurity of this solution. The concentrations of HET and MEA were determined by means of GC-FID analysis, according to a method reported elsewhere, 13 and were found to be 2.60 ± 0.06 and 2.06 ± 0.39 M, respectively. The density of the triazine solution was measured by weighing accurately measured volumes of the solution by means of an analytical balance (Sartorius 1702, accuracy 0.1 mg).…”
Section: Methodsmentioning
confidence: 99%
See 2 more Smart Citations
“…The H 2 S scavenger is typically based on 1, 3,5-hexahydrotriazines (henceforth "triazines"), that are widely used in the field, and particularly water-soluble variants such as 1,3,5-tri-(2-hydroxyethyl)-hexahydro-S-triazine (HET, also known as MEA-triazine) (Kelland, 2014;Taylor et al, 2019). Since HET is typically injected in stoichiometric excess, with respect to H 2 S, it ends up partly unreacted (unspent scavenger), together with the reaction products (spent scavengers), in the wastewater stream that is separated from the natural gas (Kelland, 2014;Montesantos et al, 2022). In line with the reaction scheme generally accepted in the literature, the main scavenging reaction products that appear in the spent scavenger wastewater are monoethanolamine (MEA) and 5-(2-hydroxyethyl)hexahydro-1,3, 5-dithiazine (DTZ) (Bakke et al, 2001;Romero et al, 2021;Taylor and Matherly, 2010).…”
Section: Introductionmentioning
confidence: 99%