STUDY ON THE SIMULTANEOUS PYROLYSIS OF ETHANE-PROPANE MIXTURE IN PULSED MICRO-REACTOR SYSTEM

The authors have investigated the simultaneous pyrolysis of ethane-propane mixture in pulsed micro-reactor system designed and assembled by themselves in the following reaction conditions: temperature 700-825℃, residence time 0.04-2.0 s, inlet pressure 1.06-1.3×10~5Pa,dilution ratio N_2:(C_2H_6+C_3H_8)=1:1.25,, mole ratio of ethane to propane in the mixture feedstock C_2H_6:C_3H_8 =1:0-0:1. The synergistic effect between the components of mixed feedstocks in pyrolysis process has been studied. The model of free radical reaction scheme composed of 18 reaction components has been advanced and the values of kinetic parameters have been estimated. The pyrolysis product distribution and selectivity calculated from this model are close to those in literature. The present paper points out the way to utilize economically oil fidd gas and natural gas sources as the feedstocks of pyrolysis in ethylene plants.     

STUDY ON THE COLLOID CHEMISTRY BEHAVIOR IN THE ONP DEINKING SYSTEM

1.INTRODUCTIONWith the great rising of secondary fiber in today’s paper market, people has been paying more and more attention to the technology of recycling the secondary fiber. However, in today’s world, the basal study of waste paper deinking is not enough. People lack the systemic cognition of different secondary fiber’s recycling. In this paper, from study on the physical-chemistry behavior in the DIP, we mainly researched the colloid chemical behavior of the pulp coarse disper…     

METHODS OF ENHANCING ETHICAL CLIMATES IN THE ORGANIZATION AND A CASE STUDY OF BUSINESS IN TAIWAN

This study involves the compilation of related Chinese and Western literature to complement an initial understanding of the enhancing methods of ethical climate in the organization. Six companies are selected as the objects of the measurements, in order to understand their responses to the methods.     

A SYNOPSIS OF THE REVISED SYSTEM FOR THE CLASSIFICATION OF CHARACEAE

All charophytes,whether living or fossil,are placed in a single class,theCharophyceae.This is generally divided into the following three orders:theSycidiales,Trochiliscales,and Charales.All living genera are referred to the familyCharaceae.J.Groves‘(1935)and R.D.Wood‘s(1962)systems for the classification ofthe Characeae were quite generally followed until today.Groves and most phyco-logists think that the corticate forms(e.g.Chara)have been derived from the     

A STUDY ON THE RATE OF SUCROSE DECOMPOSITION IN IMPURE SUGAR SOLUTIONS

探讨了不纯糖液中蔗糖酸性分解的反应动力学机理。认为，影响蔗糖分解反应速率常数Ｋ的显著因素是ｐＨ、温度以及二者的交互作用；非糖组分的影响作用不显著，它们是通过对ｐＨ的贡献来实施影响的。论文还建立了相应的数学模型，并进行了验证。     

THE STUDY OF MODIFIED TALC POWDER ON FILLER RETENTION IN PAPERMAKING

TRODUCTIONIn the past several decades, the paper industry hasbeen modernized. The efficiency is improvedcontinuously, however, the problems associated withraw material, energy and pollution are becomingmore and more serious. The requirement to improvethe retention of filler and fine fibre remains a keytask in R and D. The improvement of retention isalso good to decrease water pollution and productioncost.Filler modification is a new approach for retentionresearch. Since pulp fibre carrie…     

A STUDY ON THE IMPACT BEHAVIOUR OF EP POLYMER

This paper is a study by means of unnolched series impacting tests for some EP polymers at different temperatures, dealing with the effects of temperature and composition on the impact fracture. The results show that there is an extreme value on impact strength against temperature. And the hard particles of the second phase can enhance the impact strength of brittle materials while they induce the fracture origin initiating.