Flue gas torrefaction of distilled spirit lees and the effects on the combustion and nitrogen oxide emission

Xiaochao Zhu; Shengquan Zhou; Ziqiang Zhang; Yonggang Zhang; Jian Li; Sarwaich Ahmed; Beibei Yan; Guanyi Chen; Ning Li

doi:10.1016/j.biortech.2021.125975

Flue gas torrefaction of distilled spirit lees and the effects on the combustion and nitrogen oxide emission

Bioresour Technol. 2021 Dec:342:125975. doi: 10.1016/j.biortech.2021.125975. Epub 2021 Sep 20.

Authors

Xiaochao Zhu¹, Shengquan Zhou¹, Ziqiang Zhang², Yonggang Zhang³, Jian Li⁴, Sarwaich Ahmed¹, Beibei Yan⁵, Guanyi Chen⁶, Ning Li¹

Affiliations

¹ School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China.
² School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China; CECEP Green Carbon Environment Protection, Beijing 100082, PR China.
³ CECEP Green Carbon Environment Protection, Beijing 100082, PR China.
⁴ School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China. Electronic address: lijian_2014@tju.edu.cn.
⁵ School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China; Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China.
⁶ Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, PR China; School of Science, Tibet University, Lhasa 850012, PR China.

PMID: 34563818
DOI: 10.1016/j.biortech.2021.125975

Abstract

Flue gas torrefaction (FGT) integrated with combustion was introduced for the clean treatment of distilled spirit lees (DSL). The effects of temperature, residence time, and volumetric flow rate of FGTs were investigated. The improvement in the physicochemical and combustion characteristics of the torrefied DSL and the reaction mechanisms were clarified by a tube furnace and the TG-MS device. The results showed that FGT could effectively improve the properties of DSL. With increasing temperature, residence time, and volumetric flow rate, the mass and energy yields decreased. FGT showed positive effects on the removal of free and bonding water, as well as the enrichment of lignin. FGT effectively inhibited the release of NO_x. The overall emission of NO_x was reduced by 57.3%. Additionally, the cost of DSL drying and denitrification could be greatly reduced by FGT. This study provided a practical treatment for DSL and new insight into FGT.

Keywords: Combustion; Distilled spirit lees; Flue gas torrefaction; NO(x); TG-MS.

MeSH terms

Chemical Phenomena
Nitrogen Oxides*
Temperature

Substances

Nitrogen Oxides