Помогите, пожалуйста, с переводом слова LUMP в следующем контексте. Речь идет о моделировании реакторов каталитического риформинга..... глава "Кинетика".

Ниже приведены различные параграфы, в которых встречается данный термин:

Various kinetic models for catalytic reforming reactions that have been reported in the literature have been the subject of several reviews. The level of sophistication of these models varies from a few LUMPS to detailed kinetic models and is related to the development of high-speed hardware and large-capacity computers.

Burnett proposed a pseudo-first-order kinetic model involving only hydrocarbons with 7 atoms of carbon. Zhorov incorporated the relationship between the reaction rate constants and the composition of the naphtha feed in the kinetic model consisting of C5 and C6 LUMPS and direct formation of aromatics from paraffins.

Заранее спасибо за любую помощь!

The kinetic model involces a reasonable numbe of LUMPS and pathways, captures the reactivity differences between particular feeds, and ncorporates catalyst deactivation by coke formation. The model considered C6-C8 LUMPS of naphthenes, paraffins, and aromatics and was able to predict interactions between 13 LUMPS that undergo reactions of hydrocracking, hydrogenation-dehydrogenation, cyclization, and izomerization.

Padmavathi and.. developed a simulation model to monitor the performance of a commercial plant, in which details were given as to how the feed and the reacting scheme were LUMPED, as well as details on parameter estimation and model validation. They proposed a LUMPED kinetic model with 26 pseudocomponents.

One of the first studies about FCC kinetic modeling based on lumping technique was the three-lump kinetic scheme [5], which consist of a VGO lump, a gasoline lump (C5 to 493 K) and a gases lump (C4 and lighter) plus coke. In this model the gasoline fraction is the most profitable component of the cracked products. The VGO lump can crack either to form gasoline or to form gases plus coke.
http://www.redalyc.org/pdf/475/47546107.pdf