Method of suppressing metal contamination of synthesis gas production apparatus

Patent metadata

Field	Value
Publication number	US-2016272895-A1
Application number	US-201615170123-A
Country	US
Kind code	A1
Filing date	Jun 1, 2016
Priority date	Mar 31, 2011
Publication date	Sep 22, 2016
Grant date	—

Abstract

A synthesis gas production apparatus (reformer) to be used for a synthesis gas production step in a GTL (gas-to-liquid) process is prevented from being contaminated by metal components. A method of suppressing metal contamination of a synthesis gas production apparatus operating for a GTL process that includes a synthesis gas production step of producing synthesis gas by causing natural gas and gas containing steam and/or carbon dioxide to react with each other for reforming in a synthesis gas production apparatus in which, at the time of separating and collecting a carbon dioxide contained in the synthesis gas produced in the synthesis gas production step and recycling the separated and collected carbon dioxide as source gas for the reforming reaction in the synthesis gas production step, a nickel concentration in the recycled carbon dioxide is not higher than 0.05 ppmv.

First claim

1 . A method of suppressing metal contamination of a synthesis gas production apparatus operating for a GTL (gas-to-liquid) process, comprising:
a synthesis gas production step of producing synthesis gas by causing natural gas and gas containing steam and/or carbon dioxide to react with each other for reforming in a synthesis gas production apparatus; a step of separating and collecting carbon dioxide contained as an unreacted source gas or an intermediary product in the synthesis gas produced in the synthesis gas production step by introducing the synthesis gas into a carbon dioxide absorption apparatus having therein a bed of a filling material and bringing the synthesis gas into contact with an aqueous solution of amines in the carbon dioxide absorption apparatus; a Fischer-Tropsch oil manufacturing step of manufacturing Fischer-Tropsch oil by subjecting the synthesis gas from the step of separating and collecting carbon dioxide to a Fischer-Tropsch reaction and subsequently isolating a gaseous product from the Fischer-Tropsch oil; and an upgrading step of manufacturing various hydrocarbon oils by subjecting the Fischer-Tropsch oil manufactured in the Fischer-Tropsch oil manufacturing step to hydrotreatment and distillation, wherein the separated and collected carbon dioxide is recycled to the synthesis gas production step, and wherein the filling material in the carbon dioxide absorption apparatus is a nickel-free filling material, whereby a nickel concentration in the recycled carbon dioxide is not higher than 0.05 ppmv.

2 . The method according to claim 1 , wherein the aqueous solution of amines contains a tertiary amine.

3 . The method according to claim 1 , wherein the gas supplied to the synthesis gas production apparatus shows a H 2 O/C mol ratio between 0.1 and 3.0 and/or a CO 2 /C mol ratio between 0.1 and 3.0.

4 . The method according to claim 1 , wherein the nickel-free filling material is selected from the group consisting of titanium, ceramics, nickel-free stainless steels, and a combination of two or more thereof.

Assignees

• Japan Oil Gas & Metals Jogmec
• Inpex Corp
• Jx Nippon Oil & Energy Corp
• Japan Petroleum Exploration Co Ltd
• Cosmo Oil Co Ltd
• Nippon Steel & Sumikin Eng Co
• Chiyoda Corp

Inventors

• Wakamatsu Shuhei
• Yagi Fuyuki
• Mikuriya Tomoyuki
• Kawazuishi Kenichi

Classifications

• C01B2203/1241

  Natural gas or methane · CPC title

• C01B2203/0238

  the reforming step being a carbon dioxide reforming step · CPC title

• C10G2/30 Primary

  from carbon monoxide with hydrogen · CPC title

• C01B3/38 Primary

  using catalysts · CPC title

• C01B3/54

  including a catalytic reaction · CPC title