Search

Your search keyword '"Weipu Li"' showing total 5 results
Start Over Author "Weipu Li"
5 results on '"Weipu Li"'

1. Research progress on friction and wear properties of powder metallurgy brake pad

Author

Chunyu Yu, Jiawei Chen, Qinghai Zhang, and Weipu Li

Subjects
Mechanical engineering and machinery, TJ1-1570
Abstract

The terrain of China is relatively complex, which leads to the complex and changeable working conditions of high-speed trains during braking. Studying the influence under different braking conditions on the performance of train brake pads is a problem worthy of in-depth discussion. In order to explore the performance changes of powder metallurgy brake pads during train braking, this paper summarizes the friction and wear properties and wear mechanism of powder metallurgy brake pads under different braking conditions; combined with the research status of powder metallurgy brake pad materials, it provides directions for the research of new powder metallurgy materials. Provide reference for the improvement of brake pads of high-speed train in the future.

Published
2022
Full Text
View/download PDF

3. Unveiling the Pyrolysis Mechanisms of Hemicellulose: Experimental and Theoretical Studies

Author

Weipu Li, Rui Li, Yuying Zhao, Xiaoxiao Yang, and Yulong Wu

Subjects
Chemistry, 020209 energy, General Chemical Engineering, Energy Engineering and Power Technology, Lignocellulosic biomass, 02 engineering and technology, Pulp and paper industry, chemistry.chemical_compound, Fuel Technology, 020401 chemical engineering, 0202 electrical engineering, electronic engineering, information engineering, Hemicellulose, 0204 chemical engineering, Pyrolysis
Abstract

Pyrolysis of lignocellulosic biomass is a sustainable and low-cost technology for the production of bio-oil and valued-added chemicals. The present study aims to develop a fundamental and reasonabl...

Published
2019

4. Production of platform chemical and bio-fuel from paper mill sludge via hydrothermal liquefaction

Author

Weipu Li, Rui Li, Yulong Wu, Jianwen Lu, and Lilong Zhang

Subjects
Municipal solid waste, Moisture, business.industry, 020209 energy, Liquefaction, Biomass, Paper mill, 02 engineering and technology, Pulp and paper industry, Analytical Chemistry, Hydrothermal liquefaction, Fuel Technology, 020401 chemical engineering, Biofuel, 0202 electrical engineering, electronic engineering, information engineering, Environmental science, 0204 chemical engineering, business, Pyrolysis
Abstract

As a kind of industrial hazardous solid waste, paper mill sludge (PMS) was hard to treated by conventional process because of its high moisture, high organic content and and high environmental risk. The hydrothermal liquefaction (HTL) shows excellent potential for the conversion to a wide variety of organic matter with high water contents including various kinds sludge into fuels or value-added chemicals. In this paper, the liquefaction potential for PMS under different reaction temperatures were investigated, and the products were classified into several main components based on the results of GC-MS. The results showed that the highest yield of bio-oil was 44 % (wt/wt dry PMS without ash) at 340 °C with simply compound composition. And the bio-oil product has above 26 % long chain hydrocarbon and 22 % cycloketones. It has potential for conversion to biomass platform compounds. It can be used as bio-fuel for heat recovery of alkali recovery system of paper mill. So, adjusting different reaction temperatures of HTL, the properties of products can meet the different requirements for platform chemical and/or bio-oil fuel.

Published
2021

5. Migration and transformation of nitrogen during hydrothermal liquefaction of penicillin sludge

Author

Weipu Li, Chunli Yao, Yuying Zhao, Jianwen Lu, Rui Li, and Yulong Wu

Subjects
020209 energy, General Chemical Engineering, Aqueous two-phase system, chemistry.chemical_element, 02 engineering and technology, 010501 environmental sciences, Condensed Matter Physics, 01 natural sciences, Nitrogen, Hydrothermal liquefaction, chemistry.chemical_compound, Hydrolysis, Residue (chemistry), chemistry, Pyridine, 0202 electrical engineering, electronic engineering, information engineering, Amine gas treating, Redistribution (chemistry), Physical and Theoretical Chemistry, 0105 earth and related environmental sciences, Nuclear chemistry
Abstract

In this study, hydrothermal liquefaction (HTL) was used to dispose the penicillin sludge (PS). The effects of different reaction conditions on the product and the redistribution and transformation pathway of nitrogen were investigated. The results showed that the highest yield of bio-oil was 37.5% when the temperature of HTL was 340 °C and the holding time was 30 min. About 20% of the nitrogen was present in the solid residue obtained by HTL of PS, and the remaining was converted into other phases. The most amino-N in the PS was present in the aqueous phase in the form of Org-N, and the remaining was converted to pyrrole-N, pyridine-N and quaternary-N in the solid residue. The amine-N in the oil phase was also derived from the hydrolysis of the amino nitrogen. As the temperature of the HTL increased, the amine-N formed a heterocycle-n by Diels- Alder reaction.

Published
2020

Catalog

Books, media, physical & digital resources
See catalog results