Impacts of P-factor on the Properties of Poplar Chips

Transcription

1 SEM X- XRD TG P Klason P - LCC 1355 TG P P SEM TS742 A X Impacts of P-factor on the Properties of Poplar Chips DUAN Chao 1 2 * FENG Wen-ying 1 2 ZHANG Yan-ling 3 XU Ming 1 2 ZHANG Sheng-you China National Pulp and Paper Research Institute Beijing National Engineering Laboratory for Pulp and Paper Beijing Karpo Technology Consulting Ltd. Beijing * duanchaonba@ 126. com Abstract Based on the concept of biorefinery in pulp and paper industry pre-extracting hemicelluloses from poplar chips via hot-water prehydrolysis before kraft pulping was carried out. The influence of P-factor on the properties of the treated chips was investigated with the help of SEM XRD and TGA and so on. The results indicated that as the P-factor increases the yield and whiteness values of treated chips decrease the content of pentosan reduces significantly and the lignin content also decrease while the celluloses content decreases slightly Both the average length and width of fibers decrease after pretreatment and with the rise of P-factor the crystallinity index of cellulose increases without changing the crystal configuration After prehydrolysis treatment some spheroidalparticles formed by extracted lignin or LCC deposit on the surface of fibers and when the P-factor is higher than 1355 the surface of the treated chips are easier to cover a bright layer produced by lignin and other materials In addition the results of TGA and calorific capacity analysis showed that weight loss of the treated samples is lower than the control sample and the heating value of the treated chips increases with the increase of P-factor. Key words hot-water prehydrolysis P-factor poplar chips SEM 20% ~ 25% BAC11B

2 China Pulp & Paper Vol. 32 No P P 20 Brasch lnv = lnk 0 - E H H RT Sixta t V = P P T 0 V 373K t = IFBR exp T dt t exp exp T exp T 0 + T T 2 P 1V K 0 E H SEM X kj /mol R T K XRD TG 2V T V 373K 100 T 0 K T K t T 0 T h V 373K = 1 1 lnk 0 V lnk 0 E H /R 1. 3 TG 3 Avicel Klason L g /min Color-Touch PC L&W 769YP-15A 20 MPa S-3400N SEM 5 min XRD-6000 X- XRD METLER 3 TG ZDHW % ~ 35% ~ 48 h L&W /min 4 XRD 200 XRD λ = nm 2θ = 5 ~ 40 2θ = 0. 1 /s P = I I amorph /I Sixta I amorph 2θ = I 002 2θ = P 2 7 P 5 SEM TG 2 China pulp & Paper Vol. 32 No

3 S-3400N SEM Avicel TG 80 TG TG - 0 ~ /min 2 P Klason 140 ~ P Klason / /min / /min > > P P P - Klason ph IFBR - 2 %

4 China Pulp & Paper Vol. 32 No P P 3 P /% O A P 1643 B C D /mm /μm P XRD - LCC 2 2 2θ 10 P Ι c 3 d c 4 d 2. 5 P 5 a ~ China pulp & Paper Vol. 32 No P 2. 4 SEM P c 3 d

5 ~ % 5 b P 205 P P 0 DTG 5 a P kj /g 11 P kj /g P kj /g

6 China Pulp & Paper Vol. 32 No Klason P 220 ~ ~ 9. 61% % % 6. 43% % Klason % % % 1 Yang Shuhui. Wood Chemistry M. Beijing China Light Industry Press # 2 # P /% IFBR Klason hydrolysis J 3. 2 M X- XRD Ι P J % % 3. 3 SEM - LCC CPP P. M Adriaan Van Heiningen. Converting a Kraft Pulp Mill into an Integrated Forest Biorefinery J. Pulp and Paper Canada /kj g Brasch D J Free K W. Prehydrolysis-Kraft Pulping of Pinus Radiata Grown in New Zealand J. TAPPI Sixta Hadi Ashtari. Kraft Pulping Kinetics M. Handbook of Pulp. Weinheim Germany WILEY-VCH DUAN Chao FENG Wen-ying ZHANG Yan-ling. Research Progress in Pretreatment Technologies for Woody Biomass Biorefinery J. China Pulp & Paper J DUAN Chao FENG Wen-ying ZHANG Yan-ling. Study on Hot Water Pre-hydrolysis Process of Triploid Poplar J. Paper & Paper Making J Shijie Liu. Woody biomass Niche position as a source of sustainable renewable chemicals and energy and kinetics of hot-water extraction /. Biotechnology Advances Shi Shulan He Fuwang. Pulp and Paper Analysis and Detection M. Beijing China Light Industry Press DONG Feng-xia LIU Wen LIU Hong-feng et al. Preparation of Cellulose Nanocrystal from Cotton Pulp with Different Pretreatments J. China Pulp & Paper Wen Jialong Yuan tongqi Sun Runcang. Quantitative structures of lignins obtain by multiple NMR techniques C //Proceeding of the 4 th International Conference on Pulping Papermaking and Biotechnology. Volume I. Nanjing China Thipse S S Sheng C Booty M R et al. Chemical makeup and physical characterization of a synthetic fuel and methods of heat content e- valuation for studies on MSW incineration J. Fuel TG 6 China pulp & Paper Vol. 32 No