Thermochemical conversion of black liquor organics into fules

Licenciate thesis

Research output: ThesisLicenciateTheses

Abstract

A low-viscosity fuel oil has been prepared from black liquor by the following process: i) thermal treatment of black liquor at 300-350°C under pressure (20 MPa) in the presence of excess alkali (NaOH), ii) removal of sodium from the black liquor primary oil by acid wash, and iii) catalytic upgrading of the sodium-free black liquor primary oil. The yield of primary oil was about 40 wt-% of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7% (dry matter basis) and only about 1% of the oil was distillable (<260°C). By washing the oil with dilute acid the sodium content dropped to 0.02%. In this case the distillate yield was 11%. After the catalytic (NiMo/CoMo) two-stage (30 min at 280°C and 60 min at 390°C) hydrotreatment an oil yield of 88% was obtained and the distillate yield was 51%. The total loss of organics in the wash and upgrading stages was 20-25%.
Original languageEnglish
QualificationLicentiate Degree
Awarding Institution
  • Helsinki University of Technology
Supervisors/Advisors
  • Alén, Raimo, Supervisor, External person
  • McKeough, Paterson, Advisor, External person
Place of PublicationEspoo
Publisher
Publication statusPublished - 1991
MoE publication typeG3 Licentiate thesis

Fingerprint

waste liquors
oils
sodium
heat treatment
fuel oils
acids
alkalis
washing
viscosity

Cite this

@phdthesis{758683c79fcc44568dd8f16eaf40e090,
title = "Thermochemical conversion of black liquor organics into fules: Licenciate thesis",
abstract = "A low-viscosity fuel oil has been prepared from black liquor by the following process: i) thermal treatment of black liquor at 300-350°C under pressure (20 MPa) in the presence of excess alkali (NaOH), ii) removal of sodium from the black liquor primary oil by acid wash, and iii) catalytic upgrading of the sodium-free black liquor primary oil. The yield of primary oil was about 40 wt-{\%} of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7{\%} (dry matter basis) and only about 1{\%} of the oil was distillable (<260°C). By washing the oil with dilute acid the sodium content dropped to 0.02{\%}. In this case the distillate yield was 11{\%}. After the catalytic (NiMo/CoMo) two-stage (30 min at 280°C and 60 min at 390°C) hydrotreatment an oil yield of 88{\%} was obtained and the distillate yield was 51{\%}. The total loss of organics in the wash and upgrading stages was 20-25{\%}.",
author = "Anja Oasmaa",
note = "TK503",
year = "1991",
language = "English",
publisher = "Helsinki University of Technology",
address = "Finland",
school = "Helsinki University of Technology",

}

Oasmaa, A 1991, 'Thermochemical conversion of black liquor organics into fules: Licenciate thesis', Licentiate Degree, Helsinki University of Technology, Espoo.

Thermochemical conversion of black liquor organics into fules : Licenciate thesis. / Oasmaa, Anja.

Espoo : Helsinki University of Technology, 1991. 80 p.

Research output: ThesisLicenciateTheses

TY - THES

T1 - Thermochemical conversion of black liquor organics into fules

T2 - Licenciate thesis

AU - Oasmaa, Anja

N1 - TK503

PY - 1991

Y1 - 1991

N2 - A low-viscosity fuel oil has been prepared from black liquor by the following process: i) thermal treatment of black liquor at 300-350°C under pressure (20 MPa) in the presence of excess alkali (NaOH), ii) removal of sodium from the black liquor primary oil by acid wash, and iii) catalytic upgrading of the sodium-free black liquor primary oil. The yield of primary oil was about 40 wt-% of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7% (dry matter basis) and only about 1% of the oil was distillable (<260°C). By washing the oil with dilute acid the sodium content dropped to 0.02%. In this case the distillate yield was 11%. After the catalytic (NiMo/CoMo) two-stage (30 min at 280°C and 60 min at 390°C) hydrotreatment an oil yield of 88% was obtained and the distillate yield was 51%. The total loss of organics in the wash and upgrading stages was 20-25%.

AB - A low-viscosity fuel oil has been prepared from black liquor by the following process: i) thermal treatment of black liquor at 300-350°C under pressure (20 MPa) in the presence of excess alkali (NaOH), ii) removal of sodium from the black liquor primary oil by acid wash, and iii) catalytic upgrading of the sodium-free black liquor primary oil. The yield of primary oil was about 40 wt-% of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7% (dry matter basis) and only about 1% of the oil was distillable (<260°C). By washing the oil with dilute acid the sodium content dropped to 0.02%. In this case the distillate yield was 11%. After the catalytic (NiMo/CoMo) two-stage (30 min at 280°C and 60 min at 390°C) hydrotreatment an oil yield of 88% was obtained and the distillate yield was 51%. The total loss of organics in the wash and upgrading stages was 20-25%.

M3 - Licenciate

PB - Helsinki University of Technology

CY - Espoo

ER -