In the research Pinus koraiensis and Lorix gmelini were used as raw materials,with the analysis of L9 (34) experimental design and pulping mechanism, the optimal pulping technological parameters and corresponding AS-A...In the research Pinus koraiensis and Lorix gmelini were used as raw materials,with the analysis of L9 (34) experimental design and pulping mechanism, the optimal pulping technological parameters and corresponding AS-AQ pulp properties were obtained. The results showed that the ylelds of Pinus koraiensis and Larix gmelini AS-AQ pulp were much higher than that of corresponding kraft and has an environmental advantage over kraft. AS-AQ pulping Produces pulps with strength properties comparable to kraft.展开更多
The rationale for this research is to more efficiently produce higher yield and uniform linerboard grade pulps comparable to current manufacturing technologies using a modified kraft cooking characterized by a green l...The rationale for this research is to more efficiently produce higher yield and uniform linerboard grade pulps comparable to current manufacturing technologies using a modified kraft cooking characterized by a green liquor pretreatment stage. The pretreatment stage employed is considered a low capital method that employs mill green liquor at the front end of cook. Since green liquor typically has a high sulfidity to alkalinity ratio, it is ideal for significant improvements to pulp properties.The manufacture of linerboard grade pulps in this study has been accomplished in the laboratory by pretreating industrially supplied southern pine chips with varying concentrations of green liquor and anthraquinone (AQ). The influence of the pretreatment level of green liquor, pretreatment time, AQ, kraft cooking AA dosage, and H-factor on the properties of the pulp obtained was investigated. The potential benefits of this green liquor pretreatment pulping technology for the paper industry are a decrease in alkali digester consumption, shortened cooking times, and pulp yield increases.展开更多
依据PAS 2050商品和服务全生命周期的温室气体(GHG)排放评价规范及欧洲造纸工业联合会(CEPI)纸和纸板碳足迹评价框架文件,以"摇篮-到-大门"的方法对100%OCC生产的箱纸板碳足迹进行了评价。结果表明,生产1000 kg箱纸板排放的...依据PAS 2050商品和服务全生命周期的温室气体(GHG)排放评价规范及欧洲造纸工业联合会(CEPI)纸和纸板碳足迹评价框架文件,以"摇篮-到-大门"的方法对100%OCC生产的箱纸板碳足迹进行了评价。结果表明,生产1000 kg箱纸板排放的温室气体为1798.2 kg CO2e,产品碳存储为-41.4 kg CO2e,其中抄纸过程是主要排放过程,占GHG排放量的61.7%,排放源主要来自电力和蒸汽的消耗。因此造纸工业提高能源利用效率、降低单位产品能耗是推行低碳造纸的必由之路。展开更多
文摘In the research Pinus koraiensis and Lorix gmelini were used as raw materials,with the analysis of L9 (34) experimental design and pulping mechanism, the optimal pulping technological parameters and corresponding AS-AQ pulp properties were obtained. The results showed that the ylelds of Pinus koraiensis and Larix gmelini AS-AQ pulp were much higher than that of corresponding kraft and has an environmental advantage over kraft. AS-AQ pulping Produces pulps with strength properties comparable to kraft.
文摘The rationale for this research is to more efficiently produce higher yield and uniform linerboard grade pulps comparable to current manufacturing technologies using a modified kraft cooking characterized by a green liquor pretreatment stage. The pretreatment stage employed is considered a low capital method that employs mill green liquor at the front end of cook. Since green liquor typically has a high sulfidity to alkalinity ratio, it is ideal for significant improvements to pulp properties.The manufacture of linerboard grade pulps in this study has been accomplished in the laboratory by pretreating industrially supplied southern pine chips with varying concentrations of green liquor and anthraquinone (AQ). The influence of the pretreatment level of green liquor, pretreatment time, AQ, kraft cooking AA dosage, and H-factor on the properties of the pulp obtained was investigated. The potential benefits of this green liquor pretreatment pulping technology for the paper industry are a decrease in alkali digester consumption, shortened cooking times, and pulp yield increases.
文摘依据PAS 2050商品和服务全生命周期的温室气体(GHG)排放评价规范及欧洲造纸工业联合会(CEPI)纸和纸板碳足迹评价框架文件,以"摇篮-到-大门"的方法对100%OCC生产的箱纸板碳足迹进行了评价。结果表明,生产1000 kg箱纸板排放的温室气体为1798.2 kg CO2e,产品碳存储为-41.4 kg CO2e,其中抄纸过程是主要排放过程,占GHG排放量的61.7%,排放源主要来自电力和蒸汽的消耗。因此造纸工业提高能源利用效率、降低单位产品能耗是推行低碳造纸的必由之路。
