Recent research progresses in catalysts,such as dolomite,olivine,clay minerals,char,alkali metal-based compounds and Rh/CeO2/SiO2 for cracking biomass tar and CaO,LZ-Y82 and Ni-3 for cracking coal tar are reviewed in this article. The advantages and disadvantages of catalysts as well as catalytic mechanism are analyzed.
Results indicated that the leaf area, stem and leaf biomass, and caliper of seedlings of all four poplar clones increased with the decrease in cutting density.
Leaf area index reached its highest level at the spacing of 40 cm×40 cm, while the aboveground biomass of the seedling on an area basis increased as the cutting density increased.
Root biomass, length, and the number of roots in every diameter class, for each soil layer and for each plant species, are regarded as observation variables.
Each of the biomass materials was first treated with dilute sulfuric acid under selected conditions (acid concentration =1.4% (w/w), temperature =165°C, and time =8 min) and then treated with the enzymes (cellulases and β-glucosidase).
Japanese oak bark, which is one of the most difficult woody biomass materials for iron-catalyzed lowtemperature (>amp;lt;700°C) hydrogasification, was subjected to HNO3 oxidation as the pretreatment after prewashing with water.
Lignocellulosic biomass materials were pretreated with dilute sulfuric acid, followed by analysis of partially and extensively washed pretreated solids.
Reaction Kineties of gasification of biomass-char in carbon-dioxide at atmospheric pressure was investigated in a thermobalance reactor using six kinds of biomass-char.From the experimental data, their mean specific gasification rates were determinded. The rate equation dx/dt = k(l-x) is proposed and used to evaluate the apparant activation energy and preexponen-tial factor for gasification reaction of six kinds of biomass-char in carbon-dioxide. Results show that the rate equation proposed is reasonable.
In this paper,three biomass gasification technologies for MHV fuel gas:steam gasification,oxygen,gasifieation dual bed gasification,have been analyzed and their advantages have also been discussed.Based on the oxygen gasification,the investment of equipment and cost of MHV fuel gas have been estimated.Compaired with the normal fuel gas,it has been found that the biomass MHV fuel gas has strong competitive ability in Chinese market.
This paper analyzes the design and application of the biomass CFBG. Some key parameters of the biomass CFBG,have been determined and elucidated in detail. The ER is the most important parameter and must be controlled carefully. Some key technologies in biomass CFBG development have also been investigated in this paper.