METHOD AND SYSTEM FOR PREPARING UREA BY COUPLING DENITRATION WITH ELECTROCATALYTIC REDUCTION

Title:

METHOD AND SYSTEM FOR PREPARING UREA BY COUPLING DENITRATION WITH ELECTROCATALYTIC REDUCTION

Document Type and Number:

WIPO Patent Application WO/2022/156549

Kind Code:

A1

Abstract:

The present invention relates to a method and a system for preparing urea by coupling denitration with electrocatalytic reduction. Specifically, the method of the present invention comprises: introducing an absorption solution containing nitrite and nitrate, generated by carrying out a denitration process on flue gas containing nitric oxide, into a separation process to separate out the nitrite and the nitrate, so as to obtain a solution rich in nitrite and nitrate; and introducing the solution rich in nitrite and nitrate generated in the separation process into an electrocatalysis process, and performing electrocatalytic reduction in the presence of carbon dioxide or carbonate so as to generate a urea solution. The system of the present invention comprises: a denitration device, a separation device connected to the denitration device, and an electrocatalysis device connected to the separation device. The method and system of the present invention can be used for the deep removal of nitrogen oxides from industrial flue gas at a low temperature, and can achieve the recycling of nitrogen.

More Like This:

JP2006247573	DENITRATION CONTROL APPARATUS FOR COMBINED CYCLE POWER GENERATION PLANT
JP2864642	[Title of the invention] NO bottom x gas treatment method
JP2710985	[Title of Invention] Air Preheater Performance Diagnosis Method

Inventors:

PENG YUE (CN)
LI JUNHUA (CN)
CHEN ZHEN (CN)
YIN HAIBO (CN)
WANG RONG (CN)

Application Number:

PCT/CN2022/070761

Publication Date:

July 28, 2022

Filing Date:

January 07, 2022

Export Citation:

Click for automatic bibliography generation Help

Assignee:

UNIV TSINGHUA (CN)

International Classes:

B01D53/56; C07C273/02; B01D53/78; C07C273/16

Foreign References:

CN112920087A	2021-06-08
CN106474898A	2017-03-08

Other References:

ZHOU HUAMIN: "Electrochemical Synthesis of Urea by Simultaneous Reduction of NO3- and CO2", CHINESE MASTER'S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCES I, no. 1, 15 January 2014 (2014-01-15), XP055952778

Attorney, Agent or Firm:

LINDA LIU & PARTNERS (CN)

Download PDF:

View/Download PDF PDF Help

Previous Patent: UCI MULTIPLEXING TRANSMISSION METHOD AND APPARATUS, AND STORAGE MEDIUM

Next Patent: ELECTRONIC DEVICE