Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level

Naoyuki Kunisada, Ki Hyouk Choi, Yozo Korai, Isao Mochida, K. Nakano

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

A two layer catalyst bed was prepared to achieve desulfurization without H2S (NH3) removal between layers. The functions of the catalysts in each layer were defined as follows. first layer: complete removal of reactive sulfur species and 95% removal of refractory sulfur species. second layers: remaining refractory sulfur species (∼ 400-500 ppm) must be removed to < 10 ppm in the presence of H2S and NH3. Several types of zeolite containing supports for HDS catalysts were prepared to be studied in the first and second layers. Acidity is important to enhance HDS of the refractory sulfur species in the hydrogenation route by moderate H2S inhibition. Zeolite containing CoMo and NiMo showed higher activity in straight run gas oil (SRGO), hydrodesulfurized SRGO + H2S + NH3. On the other hand, zeolite having strong acidity was easily deactivated and could crack and isomerizes hydrocarbons. Alumina-zeolite composite catalyst showed very high activity in HDS of HSRGO, while it did not crack the substrate so much. Thus, modified zeolite alumina catalyst might have longer life time than any other zeolite containing catalyst, with high cracking activity. Appropriate sets of two catalysts with successive layers were very active to achieve regulated sulfur level of gas oil.

Original languageEnglish
Pages (from-to)502-503
Number of pages2
JournalACS Division of Fuel Chemistry, Preprints
Volume48
Issue number2
Publication statusPublished - Sep 1 2003

Fingerprint

Hydrodesulfurization
Catalyst supports
Sulfur
Catalysts
Gas oils
Refractory materials
Acidity
Alumina
Cracks
Desulfurization
Hydrogenation
Catalyst activity
Hydrocarbons
Composite materials
Substrates

All Science Journal Classification (ASJC) codes

  • Energy(all)

Cite this

Kunisada, N., Choi, K. H., Korai, Y., Mochida, I., & Nakano, K. (2003). Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level. ACS Division of Fuel Chemistry, Preprints, 48(2), 502-503.

Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level. / Kunisada, Naoyuki; Choi, Ki Hyouk; Korai, Yozo; Mochida, Isao; Nakano, K.

In: ACS Division of Fuel Chemistry, Preprints, Vol. 48, No. 2, 01.09.2003, p. 502-503.

Research output: Contribution to journalConference article

Kunisada, N, Choi, KH, Korai, Y, Mochida, I & Nakano, K 2003, 'Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level', ACS Division of Fuel Chemistry, Preprints, vol. 48, no. 2, pp. 502-503.
Kunisada, Naoyuki ; Choi, Ki Hyouk ; Korai, Yozo ; Mochida, Isao ; Nakano, K. / Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level. In: ACS Division of Fuel Chemistry, Preprints. 2003 ; Vol. 48, No. 2. pp. 502-503.
@article{f4104a9337cf45768aff42ec2c6a6629,
title = "Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level",
abstract = "A two layer catalyst bed was prepared to achieve desulfurization without H2S (NH3) removal between layers. The functions of the catalysts in each layer were defined as follows. first layer: complete removal of reactive sulfur species and 95{\%} removal of refractory sulfur species. second layers: remaining refractory sulfur species (∼ 400-500 ppm) must be removed to < 10 ppm in the presence of H2S and NH3. Several types of zeolite containing supports for HDS catalysts were prepared to be studied in the first and second layers. Acidity is important to enhance HDS of the refractory sulfur species in the hydrogenation route by moderate H2S inhibition. Zeolite containing CoMo and NiMo showed higher activity in straight run gas oil (SRGO), hydrodesulfurized SRGO + H2S + NH3. On the other hand, zeolite having strong acidity was easily deactivated and could crack and isomerizes hydrocarbons. Alumina-zeolite composite catalyst showed very high activity in HDS of HSRGO, while it did not crack the substrate so much. Thus, modified zeolite alumina catalyst might have longer life time than any other zeolite containing catalyst, with high cracking activity. Appropriate sets of two catalysts with successive layers were very active to achieve regulated sulfur level of gas oil.",
author = "Naoyuki Kunisada and Choi, {Ki Hyouk} and Yozo Korai and Isao Mochida and K. Nakano",
year = "2003",
month = "9",
day = "1",
language = "English",
volume = "48",
pages = "502--503",
journal = "ACS Division of Fuel Chemistry, Preprints",
issn = "0569-3772",
number = "2",

}

TY - JOUR

T1 - Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level

AU - Kunisada, Naoyuki

AU - Choi, Ki Hyouk

AU - Korai, Yozo

AU - Mochida, Isao

AU - Nakano, K.

PY - 2003/9/1

Y1 - 2003/9/1

N2 - A two layer catalyst bed was prepared to achieve desulfurization without H2S (NH3) removal between layers. The functions of the catalysts in each layer were defined as follows. first layer: complete removal of reactive sulfur species and 95% removal of refractory sulfur species. second layers: remaining refractory sulfur species (∼ 400-500 ppm) must be removed to < 10 ppm in the presence of H2S and NH3. Several types of zeolite containing supports for HDS catalysts were prepared to be studied in the first and second layers. Acidity is important to enhance HDS of the refractory sulfur species in the hydrogenation route by moderate H2S inhibition. Zeolite containing CoMo and NiMo showed higher activity in straight run gas oil (SRGO), hydrodesulfurized SRGO + H2S + NH3. On the other hand, zeolite having strong acidity was easily deactivated and could crack and isomerizes hydrocarbons. Alumina-zeolite composite catalyst showed very high activity in HDS of HSRGO, while it did not crack the substrate so much. Thus, modified zeolite alumina catalyst might have longer life time than any other zeolite containing catalyst, with high cracking activity. Appropriate sets of two catalysts with successive layers were very active to achieve regulated sulfur level of gas oil.

AB - A two layer catalyst bed was prepared to achieve desulfurization without H2S (NH3) removal between layers. The functions of the catalysts in each layer were defined as follows. first layer: complete removal of reactive sulfur species and 95% removal of refractory sulfur species. second layers: remaining refractory sulfur species (∼ 400-500 ppm) must be removed to < 10 ppm in the presence of H2S and NH3. Several types of zeolite containing supports for HDS catalysts were prepared to be studied in the first and second layers. Acidity is important to enhance HDS of the refractory sulfur species in the hydrogenation route by moderate H2S inhibition. Zeolite containing CoMo and NiMo showed higher activity in straight run gas oil (SRGO), hydrodesulfurized SRGO + H2S + NH3. On the other hand, zeolite having strong acidity was easily deactivated and could crack and isomerizes hydrocarbons. Alumina-zeolite composite catalyst showed very high activity in HDS of HSRGO, while it did not crack the substrate so much. Thus, modified zeolite alumina catalyst might have longer life time than any other zeolite containing catalyst, with high cracking activity. Appropriate sets of two catalysts with successive layers were very active to achieve regulated sulfur level of gas oil.

UR - http://www.scopus.com/inward/record.url?scp=1042301652&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1042301652&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:1042301652

VL - 48

SP - 502

EP - 503

JO - ACS Division of Fuel Chemistry, Preprints

JF - ACS Division of Fuel Chemistry, Preprints

SN - 0569-3772

IS - 2

ER -