Papers by Author: Wan Xi Peng

Abstract: In order to widely use Eucalyptus urophydis wood, its ether/acetone extractives were identified by Py-GC/MS. The main and abundant constituents of 750°С pyrolysis products were 1,3-butadiene, 2-methyl-(5.9%), benzofuran, 2,3-dihydro-(4.11%), 1,3-butadiene(3.69%), stigmastan-3,5-diene (3.66%),.gamma.-sitosterol(2.13%), 2-butene, 2,3-dimethyl-(2.03%), toluene (1.92%), 1,4- cyclohexadiene,1-methyl-(1.76%), 1h-indene, 5-butyl-6-hexyloctahydro-(1.73%), 1,3-cyclohexadiene(1.66%), phenol(1.58%), 1-hexene(1.54%), sulfide, bis(2-cyano-3,4- dihydro- 2,3,3-trimethyl-2h-pyrrol-5-yl)- (1.46%), benzene(1.38%), phenol, 4-methyl-(1.35%), cholest-8(14)- ene-3,15-dione(1.23%), acetic acid(1.21%), benzene, 1,2,4-trimethyl-(1.2%), stigmast-4-en-3-one (1.12%), 1-decene(1.1%), 1-heptene(1.08%),etc. So the ether/acetone extractives of Eucalyptus urophydis biomass were used as biomass energy.

Abstract: In order to explore the application prospects of wood extractives in the biomass energy, the several wood extractives were isolated by organic solvent. The results of functional analysis suggested that these wood extractives could accelerate benzene-alcohol’s burning, but played a certain role in inhibiting ether’s burning. This reslut revealed that the wood extractives had huge potential applications in the field of add-on bioenergy.

Abstract: Pinus has been put into mass production. However, many heat release volatiles would produce air pollution during drying process. Therefore, the heat release behavior of Pinus biomass was studied by TD-GC/MS. The main constituents were at 100°С 1,4-methanoazulene,decahydro-4,8, 8-trimethyl-9-methylene-(30.6%), 1,4-methanoazulen-9-ol,decahydro-1,5,5,8a-tetramethyl-(14.85%), 1,2,4-methenoazulene, decahydro-1,5,5,8a-tetramethyl-(8.56%), 1r-.alpha.-pinene(7.92%), epiglobulol(4.57%), bicyclo[2.2.1]heptan- 2-one, 1,7,7- trimethyl-, (1r)- (4.33%), caryophyllene oxide(3.37%), etc. And the main constituents at 110°С were 1,4-methanoazulene, decahydro-4,8, 8-trimethyl-9-methylene-(40.31%), 1,4-methanoazulen-9-ol, decahydro-1,5,5,8a-tetramethyl-(15.35%), .alpha.-pinene(8.88%), bicyclo [2.2.1]heptan-2-one, 1,7,7- trimethyl-, (1r)- (5.73%), cyclohexane-1,3-dione, 2-allylamin omethylene-5,5-dimethyl-(5.24%), naphthalene, 1,1'-(1,2-ethanediyl) bis[decahydro-(4.83%), spiro[5.5]undec-2-ene,3,7,7-trime thyl-11-methylene-(4.05%), etc. The heat release volatiles of Pinus biomass was safe to people during drying process.

Abstract: In order to select the optimal modification method of fire-retardant preservative formulationtion ratio for glued structural lumber of wood-based bridge deck by analysing the bonding strength of experimental samples. Through range analysis, the experiment results showed that: the mode of the best fire-retardant preservative formulationtion ratio was 45ml/(40cm×40cm) preservative, 1g/(40cm×40cm) flame retardant and 18h soaking time of adhesion. And the glued structural lumber had enough bonding strength under high flame-retardant properties, which was fit to make glued structural lumber for wood bridge.

Abstract: Smoked bamboo has been put into mass production. However, many heat release volatiles would produce air pollution during thermoplasticization process. Therefore, the heat release behavior of smoked bamboo biomass was studied by TD-GC/MS to make full use of and prevent the pollution of the volatile materials. The main constituents were acetic acid(43.95%), cyclotrisiloxane, hexamethyl-(15.89%), octasiloxane, 1,1,3,3,5,5,7,7,9,9, 11,11,13,13,15,15-hexadecamethyl-(8.22%), 1,3-benzodioxole, 5-(2-propenyl)- (4.8%), cyclodecasiloxane, eicosamethyl-(4.51%), etc at 100°С. And the main constituents were acetic acid(42.05%), 1-phenanthrenecarboxaldehyde,7-ethenyl- 1,2,3,4,4a, 4b,5,6,7,9,10,10a-dodecahydro-1,4a,7-trimethyl-(8.42%), bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-,(1r)- (8.12%), cyclotrisiloxane, hexamethyl-(6.17%), 1,3-benzodioxole, 5-(2- propenyl)-(5.26%), 4-nitro-4'-chlorodiphenylsulfoxide(3.13%), etc at 115°С. The heat release volatiles of smoked bamboo biomass might be used as biomedicines. Particularly, the volatiles had good application prospects and popularized value in purification of cedrol and acetic acid.

Abstract: In order to select the optimal production technology for laminated veneer lumber of wood bridge, the properties and mechanics of experimental samples made by China southern plantation were analyzed. The experiment results showed that: the best production technology mode was 1.6min/mm hot process time, 4 MPa hot process pressure and 25 mm board thickness. And the eucalyptus veneers were fit to make laminated veneer lumber for wood bridge.

Abstract: The benzene/ethanol extractives of Eucalyptus camaldulensis biomass were identified by Py-GC/MS to find out biomedical application. The main 350°С pyrolysis components were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)- (21.22%), .beta.-sitosterol acetate (6.4%), stigmasterol, 22,23-dihydro-(5.87%), ergosta-4,6,22-trien-3.beta.-ol(3.6%), etc. The main 350°С pyrolysis components were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)- ( 23.58%), ergosta-4,6,22-trien- 3.alpha.-ol(6.27%), decanoic acid, 1,2,3-propanetriyl ester(6.1%), 4.alpha.-methylcholest-7-en- 3-one(3.92%), stigmasterol, 22,23-dihydro-(3.57%), stigmastan-3,5- diene(2.61%), etc. And the main 750°С pyrolysis components were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)- (28.83%), .beta.-sitosterol acetate (5.58%), cholest-8(14)-ene-3,15-dione(4.33%), 1,3-butadiene,2-methyl-(3.42%), etc. So the benzene/ethanol extractives of Eucalyptus camaldulensis could be used as biomedicine.

Abstract: Smoked bamboo, which was made by bamboo in high temperature smoke, is a new indoors materials. In order to evaluate its potential health risk to human settlements, the volatile organic compounds of smoked bamboo biomaterial were adsorbed and determined by TD-GC-MS. And the main constituents of volatiles at 60°С were cyclononasiloxane, octadecamethyl-(35.14%), acetic acid(23.27%), cyclotrisiloxane, hexamethyl- (9.53%), bicyclo[4.4.0]dec-1-ene,2-isoprop yl-5-methyl-9-methylene-(7.56%), silane, 1,4-phenylenebis[trimethyl(4.32%), 1,3-benzodioxole, 5-(2-propenyl)- (3.47%), cedrol(2.75%), etc. (2) The main constituents of volatiles at 130°С were acetic acid(43.78%), 2,5-furandione, dihydro-3- methylene-(16.57%), 1,3-benzodioxole, 5-(1-propenyl)-,(z)-(6.75%), octasiloxane, 1,1,3,3,5,5,7,7,9,9, 11,11,13, 13,15,15- hexadecamethyl -(4.09%), bicyclo[2.2.1]heptan-2-one, 1,7,7- trimethyl-, (1s)- (3.21%), etc. Generally, the smoked bamboo biomaterial was safe under 60-130°С.

Abstract: The main constituents at 230°С were propanoic acid, 2-(aminooxy)-(16.99%) , propanamide, 2-hydroxy-n-methyl-(14.20%) , benzaldehyde, 2-methyl-(13.22%) , furfural(9.44%) , butanal, 2-methyl-(8.09%) , acetic acid(7.09%) , hydrazine, methyl-(4.14%) , etc. And the main constituents at 280°С were hydrazine, ethyl-(24.87%) , 2(3h)-furanone, dihydro-4-hydroxy-(15.24%) , phenol, 2,6-dimethoxy-(11.82%) , benzaldehyde, 2-methyl-(11.49%) , furfural(4.90%) , etc. The heat release volatiles of smoked bamboo biomass might be used as raw materials of rare biomedicines. So the smoked bamboo biomass for building materials had environmental friendly characteristics.

Abstract: In order to evaluate its thermal aging properties, the volatile organic compounds of engineering smoked bamboo were adsorbed and determined by TD-GC-MS. The result were: (1) The main constituents of volatiles at 160°С were acetic acid(42.20%), benzofuran, 2,3-dihydro- (7.32%), 1,3-benzodioxole, 5-(2-propenyl)-(5.72%), etc. (2) The main constituents of volatiles at 180°С were acetic acid(41.69%), benzofuran, 2,3-dihydro- (7.32%), 3(5)-[[1,2-dihydroxy-3-propoxy]met hyl]-4-hydroxy- 1h-pyrazole-5(3)-ca rboxamide (6.75%), 1-phenanthrenecarboxaldehyde, 7-ethenyl- 1,2,3,4,4a,4b,5,6,7,9,10,10a- dodecahydro- 1,4a,7 - trimethyl- (3.46%),etc. So the engineering smoked bamboo was safe under 160-180°С.