期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
Influences of Temperature and Coal Particle Size on the Flash Pyrolysis of Coal in a Fast-entrained Bed 被引量:19
1
作者 CUI Li-jie LIN Wei-gang YAO Jian-zhong 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2006年第1期103-110,共8页
The experiments on the flash pyrolysis of a lignite were carried out in a fast-entrained bed reactor as a basic study on a so-called ' coal topping process'. The investigation focused on the effects of pyrolysis tem... The experiments on the flash pyrolysis of a lignite were carried out in a fast-entrained bed reactor as a basic study on a so-called ' coal topping process'. The investigation focused on the effects of pyrolysis temperature and coal particle size on the product distribution and composition. The experimental results show that an increase in the pyrolysis temperature results in a higher yield of gaseous products while a larger particle size leads to a decrease of the liquid yield. An optimum temperature for the liquid yield was found to be 650℃. A certain amount of phenol groups was found in the liquid products, which may be used to produce high-valued fine chemicals. The FTIR analyses of the coal and chars show that aliphatic structures in the chars are gradually replaced by aromatic structures with the increasing of pyrolysis temperature and coal particle size. The results of this study provide fundamental data and optimal conditions to maximize light oils yields for the coal topping process. 展开更多
关键词 Fluidized Bed COAL flash pyrolysis Particle Size TEMPERATURE
下载PDF
Flash Pyrolysis Study of MnTC and NiCT by Using T-Jump/FTIR Spectroscopy
2
作者 孙远华 张同来 +2 位作者 张建国 乔小晶 杨利 《Journal of Beijing Institute of Technology》 EI CAS 2007年第1期103-107,共5页
Flash pyrolysis of MnTC( [Mn2(TNR)2(CHZ)2(H2O)4]·2H2O) and NiCT( [Ni(CHZ)3](TNR)·5H2O) is conducted by using T-jump/FTIR spectroscopy under 0.1 MPa Ar atmosphere. The mole fractions of the indi... Flash pyrolysis of MnTC( [Mn2(TNR)2(CHZ)2(H2O)4]·2H2O) and NiCT( [Ni(CHZ)3](TNR)·5H2O) is conducted by using T-jump/FTIR spectroscopy under 0.1 MPa Ar atmosphere. The mole fractions of the individual products in the pyrolysis gas mixture are described as a function of time. Results show that NiCT appears to produce more N2O, NH3 and HONO upon flash pyrolysis, thus secondary oxidation reduction reactions may take place to a certain extent during its thermal decomposition, which in turn leads to unsteady combustion and possibly to failure of the device. While H2O and CO2 are the major two gas products of flash pyrolysis of MnTC, it warrants further in-depth trials for the adoption in detonators as coo-friendly and chemically compatible primary explosive. The two compounds both liberate volatile metal carbonate, oxide and isocyanate compounds. 展开更多
关键词 CARBOHYDRAZIDE 2 4 6-trinitroresesrcinol manganese complex nickel complex flash pyrolysis FTIR spectroscopy
下载PDF
FLASH PYROLYSIS OF BIOMASS PARTICLES IN FLUIDIZED BED FOR BIO-OIL PRODUCTION 被引量:4
3
作者 ShurongWang MengxiangFang ChunjiangYu ZhongyangLuo KefaCen 《China Particuology》 SCIE EI CAS CSCD 2005年第1期136-140,共5页
Biomass utilization could relieve the pressure caused by conventional energy shortage and environmental pollution. Advantage should be taken of the abundant biomass in China as clean energy source to substitute for tr... Biomass utilization could relieve the pressure caused by conventional energy shortage and environmental pollution. Advantage should be taken of the abundant biomass in China as clean energy source to substitute for traditional fossil fuels. At present, flash pyrolysis appears to be an efficient method to produce high yields of liquids that could either be directly used as fuel or converted to other valuable chemicals. Experiments were carried out of pyrolyzing biomass particles in a hot dense fluidized bed of sand to obtain high-quality bio-oil. Among four kinds of biomass species adopted in our experiment, Padauk Wood had the best characteristics in producing bio-oil. GC-MS analysis showed bio-oil to be a complex mixture consisting of many compounds. Furthermore, an integrated model was proposed to reveal how temperature influences biomass pyrolysis. Computation indicated that biomass particles underwent rapid heating before pyrolysis. 展开更多
关键词 BIOMASS flash pyrolysis fluidized bed BIO-OIL MODEL
原文传递
Flash Pyrolysis Study of M2TNR (M: Carbohydrazide or Semicarbazide) by T-jump/FTIR Spectroscopy 被引量:1
4
作者 孙远华 张同来 +2 位作者 张建国 乔小晶 杨利 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2006年第6期761-764,共4页
Flash pyrolysis of (CHZ)2TNR and (SCZ)2TNR was conducted by T-jump/FTIR spectroscopy under 0.1 MPa Ar atmosphere. The results show that eleven IR-active gas products obtained during flash pyrolysis process of the ... Flash pyrolysis of (CHZ)2TNR and (SCZ)2TNR was conducted by T-jump/FTIR spectroscopy under 0.1 MPa Ar atmosphere. The results show that eleven IR-active gas products obtained during flash pyrolysis process of the two title compounds are NO, CO, HCN, NH3, NO2, N2O, HNCO, HNO2, CO2, H2O and HCHO, of which NO and CO are the main gas products. The molar fraction of the individual product in the pyrolysis gas mixture was described as a function of time. At least some of the NO2, N2O and H2O can result from the oxidization reaction of NH3 during flash pyrolysis of (CHZ)2TNR. It can be concluded that the two compounds are not worthy of further in-depth consideration of the adoption in detonators as eco-friendly primary explosive, and should not be used as gas generation composition of automobile crash airbag system taking into account the toxicity. 展开更多
关键词 2 4 6-trinitroresorcinol CARBOHYDRAZIDE SEMICARBAZIDE T-jump/FTIR flash pyrolysis
原文传递
n-Alkane bound biomarker fingerprints from asphaltenes in the bitumens of Eastern Dahomey Basin,Nigeria:Source and genetic implications
5
作者 Modupe A.Egbeola Olubunmi C.Adeigbe Olajide J.Adamolekun 《Petroleum Research》 EI 2024年第1期85-91,共7页
The asphaltene fractions of the bitumens of Eastern Dahomey Basin in Nigeria,were analyzed by flash pyrolysis-gas chromatography(Py-GC)method in order to unravel its geochemical history and properties.The distribution... The asphaltene fractions of the bitumens of Eastern Dahomey Basin in Nigeria,were analyzed by flash pyrolysis-gas chromatography(Py-GC)method in order to unravel its geochemical history and properties.The distributions of the initial biomarkers of the original oils from the pyrolysates are related to the assessment of organic matter source,paleo-redox conditions and source environment during deposition.Also,it effectively establishes the genetic relationship of the bitumens.The n-alkane distributions in the pyrolysates reveal nC_(9)-nC_(32)n-alkanes,maximizing at nC_(14),isoprenoids-pristane(Pr)and phytane(Ph),and some n-alkene peaks.High peaks of low to medium-weight nC_(9)-nC20 n-alkanes and low peaks of nC_(21)+n-alkanes characterize the distributions.These reveal that abundant algal organic matter with some terrigenous inputs contributed to the source rock of the bitumens.The high concentration of marine organic matter inputs to the source rock is further confirmed by the nC_(17)/nC27 ratios which range from 5.39 to 19.82 and shows the predominance of nC_(17)alkanes.The general unimodal n-alkane distributions in the bitumens indicate derivation from similar organic matter types showing that they are genetically related.The anoxic to suboxic environmental conditions that prevailed during the deposition of the sediments is revealed by the isoprenoids,Pr/Ph ratios(0.72-1.28).Pristane/nC_(17)and Phytane/nC_(18)range from 0.16 to 0.33 and 0.22 to 0.56,revealing that the bitumens were from predominantly marine organic matter(type II kerogen)preserved in a reducing environment with no evidence of biodegradation.However,the Ph/nC_(18)ratio and the cross plot of Pr+Ph/nC_(17)+nC_(18)allow the classification of the bitumens into two subfamilies/groups(A and B).The bitumen samples have low wax content as indicated by the degree of waxiness ranging from 0.21 to 0.38 which confirms low terrigenous input.Based on the carbon preference index(CPI:0.92 to 1.55)and odd-even predominance(OEP:0.70 to 1.36),it is concluded that the bitumens are immature to marginally mature. 展开更多
关键词 Genetic relationship flash pyrolysis BIOMARKER ASPHALTENE Pyrolysates
原文传递
Kinetics Study on the Exothermic Decomposition Reaction of [Cd(CHZ)3](ClO4)2 被引量:2
6
作者 孙远华 张同来 +3 位作者 张建国 乔小晶 杨利 郑红 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2005年第12期1607-1610,共4页
The Temperature-jump/FTIR (T-jump/FTIR) spectroscopy was introduced to resolve the decomposition kinetics parameters of [Cd(CHZ)3](ClO4)2 (CdCP) at high temperature following very rapid heating process. The in... The Temperature-jump/FTIR (T-jump/FTIR) spectroscopy was introduced to resolve the decomposition kinetics parameters of [Cd(CHZ)3](ClO4)2 (CdCP) at high temperature following very rapid heating process. The increase in the absorbances during the flash pyrolysis of CdCP yielded the kinetics parameters in the range of 360-430 ℃ at 0.1 MPa Ar atmosphere: Ea=28.6 kJ/mol and In A= 17. The kinetics parameters of the exothermic decomposition reaction were also determined by using DSC method. The value of Ea determined by T-jump/FTIR spectroscopy is smaller than that by Kissinger method and Ozawa-Doyle method, which makes these values qualitatively consistent with other energetic materials. The T-jump/FTIR spectroscopy might be resembled as the surface of explosion reaction very closely. In addition, the decomposition kinetics of evolution of the major four individual gas products was also resolved by T-jump/FTIR spectroscopy, which might be essential for detailed combustion modeling of solid energetic materials. 展开更多
关键词 cadmium perchlorate CARBOHYDRAZIDE kinetics T-jump/FTIR flash pyrolysis
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部