大粒径、低堆密度催化剂易膨胀；
The catalyst with big size and low bulk density is prone to expand.
催化剂还具有强度高、堆密度小、自再生能力强等特点。
The catalyst also had high side pressure, low bulk density and good capacity of self - generation.
结果表明，预聚合使催化活性增大、产物堆密度增大、颗粒大小均匀。
The results showed that catalytic activity and bulk density of the product particles increased and the size distributions of the product particles narrowed with the using of prepolymerization method.
随着焙烧温度的升高，比表面积、孔体积略有减少，表观堆密度增大。
The apparent density increased with the increase of calcination temperature, while the surface area and pore volume decreased little.
湿膨胀系数用于预报谷物堆密度和研究谷粒应力裂纹产生原因等研究。
The hydroscopic expansion coefficient of grains is an important physical parameter for prediction of bulk densities and study of internal stresses of grain kernel during adsorption and desorption.
测定了不同混合比例的陶瓷颗粒和小麦秸秆粉混合物含气堆密度、填充堆密度。
Bulk densities of mixture of wheat stalk powder and ceramic micro-beads with various ratios were measured by experiment for designing biomass pyrolysis equipment.
测定其水溶性浸出物和吸湿性，及其堆密度、休止角，考察其填充性和流动性状况。
Measure water soluble extract and humidity-absorption, pile concentration and dormant Angle, investigate its fill and flow.
方法确定加入辅料最大量，选择处方，制备药粉，测定吸湿量百分率、休止角、堆密度。
Methods To determine the maximum dose of adjuvant, select formula, prepare powder, and detect hygroscopicity, Angle of repose and bulk density.
实验室研究了添加氧化铝对中温变换催化剂堆密度、机械强度、活性和热稳定性的影响。
The influence of alumina addition on the bulk density, mechanical strength, activity and thermal stability of high temperature shift (HTS) catalyst was studied in laboratory.
考察了HJ - 2 0 - 2气相防锈剂的溶解度、熔点、堆密度等物理化学性能。
The solubility, melt point and density of HJ-20-2 vapor phase inhibitor are investigated.
考察了活性炭的失重率、堆密度、比表面、孔径分布及灰分含量随活化次数的增加而变化的情况。
The variation of the mass loss, packing density, surface area, distribution of pore diameter, amount of ash with the cyclical Numbers were researched.
实验中通过添加表面活性剂以及采用不同的粒度配比，有效地解决了石油沥青表面润湿性能差和具有较低堆密度的缺点。
Low surface wettability and bulk density of petroleum asphalt are effectively solved by the use of a kind of surfactant and different particles distribution in the experiment.
实验中通过添加表面活性剂以及采用不同的粒度配比，有效地解决了石油沥青表面润湿性能差和具有较低堆密度的缺点。
Low surface wettability and bulk density of petroleum asphalt are effectively solved by the use of a kind of surfactant and different particles distribution in the experiment.
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